FIELD BOOK OF INSECTS. 



found only in Brachymis and Chl&nius but e ect setae are 

 present and are important in technical classification; the 

 head is held horizontally or slightly inclined <.nd is usually 

 narrower than the thorax. Although some bright-colored 

 Lebiini hunt by day on plants, the majority hide under 

 stones or other cover. If disturbed, they run rapidly but 

 rarely fly except at night, when some species swarm about 

 lights. They are beneficial because of their predaceous 

 habits; the musky odor of many species telling of their 

 diet of flesh. The larvae are relatively long, and rather 

 flat; they have sharp, projecting mandibles and a pair of 

 posterior bristly appendages; they usually live in under- 

 ground burrows, pupating in small earthen cells. 



Cychrus is a genus (late authors divide it into several 

 genera) which is usually rather rare and, since the violet 

 or brownish-purple beetles are of good size, they are 

 often sought by collectors. The pronotum is more or less 

 turned up at the edges. The head and mandibles are 

 long, narrow, and straight, so that they may be thrust 

 into snail-shells in order to draw out the owners; the palpi 

 are shaped like a long-handled spoon. As might be guessed, 

 they are to be found only where snails are common: in 

 moist woods and similar places. See Plate LXXII. 



Carabus may be separated from Calosoma by the fact 

 that the former has the third joint of the antennas cylindri- 

 cal and the latter has it compressed. 



The species of Carabus are black or brown- 

 ish-black, and about an inch long. C. 

 sylvosus: margins of the turned-up pronotum and of 

 elytra blue; striae on elytra very fine; usually in sandy 

 woods. C. serratus: margins of pronotum (slightly turned 

 up) and of elytra violet; elytra with two or three slight 

 notches in the margin near the base; usually in damp 

 places. C. limbatus: bluish margins; pronotum a half 

 wider than long; elytra deeply striate; usually in moist 

 upland woods. C. vinctus (Plate LXXII) : bronzed, prono- 

 tum with a greenish tinge at borders; usually under bark in 

 low, moist woods. All may be caught by sinking bottles 

 or cans, baited with molasses, in the soil. 



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