EXTERNAL ANATOMY OF INSECTS. 523 
I shall conclude what I have to communicate to you 
relative to the organs of which we are treating, with a 
few observations with respect to their statzon when the 
insect reposes. In the Capricorn beetles, Hucera and 
other insects with Jong antennz, they are merely turned 
back or on one side with no particular cavity for their re- 
ception when unemployed, but probably the apex passes 
under the body. In the Predaceous and Darkling bee- 
tles (Adephagana and Melasoma) their station is usually 
under the sides of the prothorax, and in the Tortoise bee- 
tles (Casstda), under its anterior margin. In the Elastic 
beetles (Hater) they are received into a groove between 
the under margin of that part and the fore-breast (ante- 
pectus). In <Anthrenus, when the animal reposes or 
counterfeits death, the antennze are concealed in a ca- 
vity of the underside of the prothorax, at right angles 
with the throat*. In the kindred genus Byrrhus, another 
simulator of death, a large cavity is excavated under the 
same part, to receive both the forelegs and antenna, a 
narrow space being left between the angle of the pro- 
thorax and fore-breast exactly admitting the base of the 
latter, which are quite concealed under the former. In 
Cryptocephalus and Chlamys, kindred beetles, when at 
rest they are withdrawn, except their scape and pedicel, 
with the head within the cavity of the prothorax. In 
others they are turned under the head, without any par- 
ticular cavity for their reception; as in many moths, 
Apion, &c. In most of the Lamellicorn beetles their sta- 
tion is in the cavity formed by the eye and the throat, 
the knob forming an angle with the rest of the antenna. 
In Heterocerus they follow the contour of the eye’. In 
Brentus, a genus of weevils remarkably long and slen- 
* De Geer iv. ¢. vii. f. 22. » Prats XXYV, Fic. 35. 
