CARABID.E. 



43S 



Fig. 3G9. 



of use as a protection against its enemies. They are yellow- 

 ish red, with bluish and greenish elytra. Helluomorpha 

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

 large inentum and much compressed antenna;. 



Galerita is similar but 

 much larger, with a red 

 thorax, and blue or black 

 elytra. Fig. 3 70 represents 

 the larva ; Fig. 371 the pupa 

 of G. Lecontei Dejean, a Southern species. 

 Casnonia has a rhomboidal head, with 

 a long narrow neck and a cj'lindrical tho- 

 rax. C. Pensylvanica De- 

 jean (Fig. 372) is not un- 

 common, being f o u n d 

 under stones. The species 

 of Lebia are found upon 

 flowers, especially the 

 golden rod, in August and 

 September. They are gaily 

 colored, with the head con- 

 stricted behind and the ri &- 3T1 - 

 thorax pedunculate. The species of 



Fi <r 370 



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 Ptcrosti- 

 c/ms, which is a genus of great extent, the three basal 

 joints of the antennas are smooth, the 

 anterior tibiae are thickened at the ex- 

 tremity, and the dilated tarsal joints are 

 triangular or cordate. The species are Fig. 372. 

 black and of common occurrence. Amara differs 

 in the head not being narrowed behind, the slightly 

 Fig. 373. 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 

 beneath the surface of the soil, do not mature for several 

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

 28 



