THE LONG-HORNED WOOD-BORING BEETLES. 



1015 



KEY TO INDIANA SPECIES OF CRIOCEPHALUS. 



a. Third joint of hind tarsi emarginate for half its length, two-thirds 

 longer than wide : elytra finely punctured. agrestis. 

 a a. Third joint of hind tarsi bilobed. cleft nearly to base, very little longer 

 than wide; elytra more coarsely punctured. 1SS0. obsoletus. 



C. agrestis Kirby, pieeous, length 22-27 nun., is said to inhabit 

 "the United States east of Rocky Mountains." 



1850 (5978). Criocephalus obsoletus Rand.. Bost. Journ. Nat. Hist.. II. 



1S3S. 27. 



Elongate, snbcylindrical. Dark sooty or smoky brown. Front of head 

 with an impressed line. Thorax subrotimd. sides rounded, apex and base 

 truncate, the latter more narrow : disk finely and densely punctate and with 

 a distinct oval impression each side of middle. Elytra each with two finely 

 elevated lines, surface more coarsely punctate than thorax. Length 20- 

 24 mm. 



Lake County; rare. May 25. Taken from the vvashup of Lake 

 Michigan. Occurs in C1 western New York and Canada." its larvaB 

 feeding upon pine. 



V. Tetropium Kirby. 1837. (Gr., "four + eyes.") 



Oblong, subeylindrieal species having the eyes divided by a 

 deep emargination into an upper and lower portion; these parts 

 connected along the hind margin by a narrow band on which the 

 facets or granulations are obsolete. 



1851 (5982). Tetropium cinnamopterum Kirby. Faun. Bor. Ainer.. IV. 



1S37. 174. 



Oblong, subeylindrieal. Dull sooty or slaty brown: under surface, legs 

 and often the sides of elytra reddish-brown. Head and thorax slightly 

 shining, closely but distinctly punctured: the latter subrotimd without dis- 

 cal impressions. Elytra opaque, more finely punctured than thorax, each 

 with two feeble raised lines. Length 12-14 mm. 



T aPorte County: scarce. June 5. Two specimens beneath bark 

 of pine. 



VI. S modicum ITald. 1845. (Gr.. li with protuberances. ") 



Front broad, short and perpendicular: the eyes coarsely granu- 

 lated and very deeply emarginate ; antenna? scarcely as long as 

 body, male: shorter and more slender, female: the joints polished, 

 sparsely punctured and pilose. One species occurs from Xew Eng- 

 land to Texas. 



