On each side, about halfway between the lateral margin and the middle line, the posterior surface of the labrum is strengthened by a vertical chitinous slip set with large setæ.
The mouth of the Cockroach is enclosed between the labrum in front, and the labium behind, while it is bounded laterally by the mandibles and first pair of maxillæ.
A little above the articulation of the labrum the width of the clypeus is suddenly reduced, as if a squarish piece had been cut out of each lower corner.
The labrum is a secondary outgrowth from this segment, and, in some cases at least, it originates as a pair of processes which resemble true appendages, though it is unlikely that such is their real character.
The labrum is narrower than the clypeus, and of squarish shape, the lower angles being rounded.
The mouth is overhung by a large labrum or upper lip, and the integument of the dorsal surface of the body forms a more or less definite dorsal shield.
Lepidurus Angassi: a, dorsal aspect; b, ventral aspect of head showing the labrum and mouth-parts.
The labrum and clypeus are developed as a single prolongation of the oral piece, not as a pair of appendages.
In reference to the structure of the head-capsule in the imago, it appears that the clypeus and labrum represent, as already said, an unpaired median outgrowth of the oral piece.
On the dorsal surface there is already present a rudiment of the cephalic shield, continuous anteriorly with the labrum (l) or upper lip, the extraordinary size of which is characteristic of the larvae of Phyllopods.
An upper lip or labrumis formed as an unpaired organ in the line between the procephalic lobes.
They are inserted at the sides of the large upper lip or labrum (l).
In the median ventral part of the procephalic region there arises the labrum (fig.
An unpaired eye is situated on the ventral surface of the head, and immediately behind it there springs a more or less considerable upper lip (lb), which resembles the Phyllopod labrum rather than that of the Copepoda.
A plate which supports the labrum in certain Crustacea.
A small appendage beneath the upper lip or labrum of certain insects.
The labrum forms a segment of a circle; it is reddish, edged with a small number of very short, stiff hairs.
The labrum is prominent, is not distinctly divided from the head, is curved in front and edged with pale and very fine bristles.
The labrumand the complicated lamina formed by the lip and the jaws leave between them a narrow slit in which the mandibles work.
The labrum and mandibles can only be seen by removing the large labial palpi.
Rufus, duumvirs of justice for the second time, caused the labrum to be made at the public expense, by order of the Decurions.
The room in its general arrangement resembles the hot bath of the men; it has a labrum in the laconicum, and a hot bath contiguous to the furnace.
There is in the Vatican a magnificent porphyry labrum found in one of the imperial baths; and Baccius, a great modern authority on baths, speaks of labra made of glass.
Indeed the whole arrangement of the limbs of Apus with the sensory endites forms an excellent trap to catch prey over which the labrum has passed.
The labrum necessitates the animal passing forwards over its prey, then darting backward to follow it with its jaws.
This labrum almost necessitated a very deliberate manner of browsing.
In alcoholic specimens of Apus the labrum is not in a horizontal plane, as it is in most well preserved trilobites, but is tipped down at an angle of from 30 to 45, and the big mandibles lie under it.
It seems entirely possible that the hypostoma of the trilobite had as much mobility as the labrum of Apus, and that byopening downward it brought the mouth lower and nearer the food.
If the hypostoma were used in the manner indicated, the muscles must have been more efficient than those of the labrum of Apus, and it is probable that they crossed to the dorsal test.
The mouth is overhung by a large labrum or upper lip and the integument of the dorsal surface of the body forms a more or less definite dorsal shield.
The structure of the head shows that its generic distinctness from Saperda is well founded, as the head is smaller and flatter, the clypeus being twice as large, and the labrum broad and short, while in S.
The labrum or upper lip, and the clypeus are large and as distinct as in the embryos of other insects, a fact to which we shall allude again.
The labrumis distinctly defined by a well marked suture, and forms a squarish, knob-like protuberance, and in size is quite large compared to the clypeus.
About the mouth are the so-called rotary mouth brushes, dense masses of long hairs borne by the labrum and having the function of sweeping food into the mouth.
Mouth suctorial, with the mandibles and maxillae placed back to back, enclosed in a hood, formed by the union of the labrum and palpi.
The animal's Mouth and Cirri were ill-preserved; but I was able to make out that thelabrum had some strong teeth, and that the mandibles were furnished with five teeth, a greater number than in any other species.
The crest of the labrum is not toothed; the palpi have long hairs along the exterior basal margin.
Mouth: labrumwithout teeth: mandibles with five sharp teeth: maxillae with the edge straight.
The crest of labrum is hairy: the palpi are square, and have no bristles along their basal exterior margins, but long ones at their truncated ends.
I may mention, however, that the crest of the labrum is toothed, and that the segments of the posterior pairs of cirri support five pairs of main spines.
The males, in the latter, are attached to the other sex, between the basal edge of the labrum and the adductor scutorum muscle; but in S.
Mouth with the labrum notched in the middle, not swollen; palpi large, almost touching each other; mandibles generally with the lower teeth laterally double; third pair of cirri with their segments resembling those of the second pair.
The crest of the labrum is notched, and on each side of the notch there is a long row of teeth, which, however, are sometimes worn away.
Another sexual kind of clothing is exhibited by the females of those bees that have theirlabrum or upper-lip inflexed (Megachile Latr.
The labrum is highly bullate, with a row of minute teeth on the crest, placed very close together in the middle.
The labrum is moderately bullate, the longitudinal diameter of this part equalling about one third, or half of that of the rest of the mouth.
Labrum generally considerably bullate in the upper part, with a row of teeth on the crest.
Male of Ibla Cumingii; labrum and palpi, as seen with the eye on a level with the summit of the mouth.
The largely bullate labrum is placed far from the adductor, in the same manner as in the hermaphrodite.
The inner fold of the labrum forming the supra-oesophageal cavity, is thickened, and shows a trace of a central line of junction, as in Sessile Cirripedes.
Labrum placed far from the adductor scutorum muscle, with the upper part exceedingly prominent; apparently there are no teeth on the crest.
The inner fold of the labrum is much thickened, yellow, punctured, and with a tuft of fine bristles on each side.
As soon as the wound is made the insect pours out through the tube of the hypopharynx some of the secretion from the salivary glands and then begins to suck up the blood through the hollow labrum into the pharynx and on into the stomach.
The uppermost of these, the labrum-epipharynx, or labrum as we will call it, is the largest and is really a hollow tube very slightly open on its under side.
The alveus (3) is at one end, and the labrum (4) at the other.
The flues under the calidarium and the labrum (1) may be observed, as also the opening in the roof above.
The Corixidae are small flattened water-bugs, with very short unjointed beak, the labrum being enclosed within the second maxillae, and the foot in the fore and intermediate leg having but a single segment.
In front of the rostrum and the piercers lies the pointed flexible labrum and within its base a small hypopharynx (fig.
The actual piercing organs are the mandibles, while the upper lip or labrum forms a sucking tube.
The maxillae are not piercing organs, and their function is to protect the mandibles and labrum and separate the hairs or feathers of the host.
Maxillary and labial palpi are also present, and the latter, together with the labrum or lower lip, form the rostrum.
The direction of Vitruvius, that the labrum should be placed under a window in such a way that the shadows of those standing around should not fall on it, is here literally observed.
The labrum is intact, a round, shallow basin of white marble resting on a support of masonry; it has here no separate niche.
A lead pipe leading from it to the labrum of the women's caldarium is still to be seen; the water bubbled up in the middle of the labrum.
In the caldarium the niche for the labrum remains; the bath basin probably stood opposite the entrance, where it could be easily heated from the kitchen.
They make the puncture and are interlocked with the labrum to form a sucking tube.
The labial palpi are forced apart as the mandibles and labrum penetrate into the victim’s flesh.
The labrumis considered by some authorities to be the hypopharynx.
When the flea has chosen a spot to pierce the skin, the rostrum, with the mandibles and long upper lip or labrum inside it, is moved a little forward.
