854 [Assemblt 
The head is retractile within and but half as broad as the second segment, and is coal 
Mack except at its base, the black being edged posteriorly with ehesnut brown. The 
wpper lip or labrum is transverse oval, rather broader towards its base, honey yellow, 
•nd covered with short yellow hairs which incline forwards. The upper jaws or mandi- 
Mesare robust, with an angular obtuse tooth-like projection near the middle of their 
inner sides, their tips being simple and rather blunt. The antennas are minute conical 
two-jointed points projecting outwards at the base of the mandibles and dtotant from 
«ie base of the head. The feelers arc thrice the size of the antenna;, conical, three- 
jainted and of a ehesnut brown color; the lobe of the lower jaws or maxilire projects 
at the inner base of the feelers and is more than half their length and clothed with 
short dense pubescence. The feelers of the lower lip or the labial palpi are minute but 
perceptible. The throat is whitish, the suture at the base of the oral organs black 
edged posteriorly with ehesnut brown. The apical segment of the body is divided 
iirto two parts by a trausver.se impressed line, and might, as in many other larva;, be 
■Counted as two segments, the last one being much more narrow and short in this 
insect. 
The celebrated Swedish entomologist, Baron De Geer, long ?go 
published a description and figure of this beetle in the fifth volume 
his Meraoires on Insects, page 113, under the name of Cerambyx 
tigrinus, or the Tiger Cerambyx, a napie suggested perhaps from 
its size and colors. It has lately been described by Rev. D. 
Xiegler, and by Prof. Haldeman, under the name of Monohammus 
frmentosus, or the Wooly Cerambyx, which name, however, must 
give place to that whicli was previously bestowed. Some of the 
descriptions that have been published have evidently been drawn 
from imperfect specimens, denuded of their pubescence in places. 
The medium length of this beetle is about one inch, though, like most other Long 
horned beetles the two sexes differ much in size, the males being often only 0.85, 
whilst the females are 1.16. The ground color is brown, sometimes tingfd with red- 
Htfc or on the elytra with pale yellow; and the surface is covered beneath and for 
the most part above with fine short oppressed hairs of an ashy o: a tawny-yellowish 
white color. The head is punctured, at least on its summit, and has an impressed 
fine in its middle. The mouth is of a honey-yellow colo#above aDd beneath, the 
«^>er lip being hairy and blackish except at its anterior edge, and the mandibles are 
deep black, their bases brown. In the notch of the eyes is an elevation on which the 
Mtennte are inserted. These are rather shorter than the body, eleven-jointed, the 
second joint very short and more broad than long; the basal joint is double the thick- 
nesa and but half the length of the third joint, which, with those that succeed it are 
about equal in length and gradually diminish in thickness. The two basal joints are 
brown, all the others whitish or pale yellow and stained with brown at their tips. 
The thorax is everywhere covered with short appressed hairs, which are more dense 
beneath, and has on each side in the middle,a conical erect, spine rounded at its apex. 
The seutel is brown, its spiral half covered with whitish or light yellow lmb.s. The 
