COLEOPTERA. — TROGOSITIDES. 147 



phylinus. Unless excited or in fear their movements are slow, like the 

 imago. The jaws are much exserted, and frequently opened whilst 

 creeping about. The head is flat, and in walking it is constantly in 

 motion from side to side, or upwards and downwards. They draw the 

 abdomen after them by the contraction of the rings, affixing them- 

 selves in their advanced position by means of an anal proleg; and in 

 running backwards, which they easily do, they fasten themselves by 

 this proleg, and then pull the rest of the body towards it; when 

 fastening themselves by the legs again they extend the body back- 

 wards, again affixing themselves by the anal proleg. The last segment 

 of the body is furnished above with two small spines. 



The larva (7?^. 11. 21.) of Trogosita caraboides {^fig- 11. 14.) is 

 long, narrow, especially towards the head, white, fleshy, and with long 

 scattered hairs ; the head small and piceous, as well as two spots on 

 each of the thoracic segments ; the last abdominal segment has two 

 rather strong conical spines. This larva is termed by the French 

 Cadelle, and is extremely injurious to housed grain, upon which it 

 feeds. There is a memoir by Mr. Kirkupp on this insect in Entomo- 

 logical Trans, pt. 3. ; and anotherby M. Dorthes upon its ravages in 

 granaries, and an account of its transformations, noticed in Latreille's 

 Hist. Generale, vol. xi. Dr. Hammerschmidt has also figured this insect 

 in its different states in his memoir De Insectis AgriculturcB damnosis, 

 Vienna, 4to. 1832, pi. 2. 



Mr. MacLeay observes of the larva of Tribolium (Colydium Herhst.^ 

 castaneum, that it scarcely differs from that of Dermestes, except in 

 being less hirsute (^Ann. Javanica, No. 92.). I am indebted to M. V. 

 Audouin for a figure and description of the larva of Colydium sulcatum 

 i^fig' 12. 5.), which resides beneath the bark of the elm. The larva 

 is long, subdepressed, slightly curved; with three pairs of short tho- 

 racic legs, and a pair of short recurved horny sharp points upon the 

 terminal segment of the body. Dr. llatzeburg has also figured this 

 insect in its different states in his Forst-lnsecten, representing the 

 larva as creeping in a horizontal position, and not with the body 

 curved; the pupa is very much elongated, with two short obtuse 

 points at the extremity of the body. 



Engis rufifrons {Ji^. 11.6.) inhabits Boleti. I am indebted to Dr. 

 Dickson for a specimen of Boletus polymorphus, in which a great num- 

 ber of this insect had been reared, and in which I also discovered the 

 larvae (^^. 11. 13.) in great profusion, which arc narrow, somewhat 



L 2 



