CARABID^. 



43n 



Fig. 36i>. 



of use £is a protection against its enemies. The}' are 3ellow- 

 ish red, with bhiish and greenish elytra. Helluomoi'pha 

 (H. praeusta Lap. Fig. 369 ; a, mentum) has a 

 large mentum and much compressed antenniie. 

 Galerita is similar but 

 much larger, with a red 

 thorax, and blue or black 

 elytra. Fig. 370 represents 

 the larva ; Fig. 371 the pupa 

 of G. Lecontei Dejeau, a Southern specieSo 

 Casnonia has a rhomboidal head, with 

 a long naiTOw neck and a cylindrical tho- 

 rax. C. Pensylvanica De- 

 jean (Fig. 372) is not un- 

 common, being found 

 under stones. The species 

 of Lehia are found upon 

 flowers, especially the 

 golden rod, in August and 

 September. They are gaily 

 colored, with the head con- 

 stricted behind and the 

 thorax pedunculate. The species of 

 Platynus (P. cupripenne Say, Fig. 373) 

 are often of brilliant metallic green and red colors. In Cymin'^ 

 dis, which is hairy, the head is not constricted behind, and the 

 last joint of the labial palpi is dilated. In Pterosti- 

 chus, which is a genus of great extent, the three basal 

 joints of the antennjB are smooth, the 

 anterior tibiai are thickened at the ex- 

 tremity, and the dilated tarsal joints are 

 triangular or cordate. The species are Fi-. 372. 

 black and of common occurrence. Amara differs 

 in the head not being narrowed behind, the slightly 

 emarginate labrum and the elytra being without 

 the usual punctures. Zimmerman states that the species are 

 annual, or double brooded annually ; the eggs, which are laid 

 l)eneath the suiface of the soil, do not mature for several 

 days after coupling ; the larvte moult once, live six to eight 



Fig. 371. 



Fia-. 370. 



Fig. 373. 



