1028 



FAMILY' Lll. — CERAMBYCID.T:. 



KEY TO SPECIES OF OBKIUM. 



a. Head and tlun-ax piccous, coarsely and closely punctate; elytra pale red- 

 dish-brown, very s])arsely punctate. kubidum. 

 aa. Body uniformly reddish-yellow; thorax not closely punctate; elytra 

 more closely punctate. 1901. rubrum. 



1901 (G00l>). Obrium RiBRtM Newni., Knt. Mag., V, 1838, 393. 



Elongcate, subcylindrical. I'ale reddish-yellow, shining. Head liroader 

 tlian thorax, the latter with an obtuse tubercle each side near middle. Ely- 

 tra rather coarsely punctate, each puncture bearing a yellowish hair. Fe- 

 mora rather strongly clubbed. Length 5.5-6.5 mm. 



Posey, Piitnam and Crawfoi-rl counties; scarce. June 24-June 

 28. Beaten from vegetation. 



Tribe III. STENOPTINI. 



In this tril)e tlie front coxal cavities are widely angnlated on the 

 outer side, but entirely closed behind; abdomen normal in both 

 sexes; head extended forward, the front large and oblique; eyes 

 finely granulated and deeply emarginate ; hind tarsi with first joint 

 twice as long as second ; legs and thorax sparsely clothed with long 

 flying hairs. Two genera, each represented in Indiana by a single 

 species, compose the tribe. 



KEY TO GENERA OF STENOPTINI. 



*;. Elytra scarcely longer than thorax, their tips separated and rounded; 



mesosternum triangular and truncate. XX. Molorchus. 



(Id. Elytra elongate, gradually awl-shai)ed and widely separated at apex; 



mesosternum broad, widely emarginate behind. XXT. Calmmoxys. 



XX. ]\IoLORCHi's Fab. 17f)2. (A mythological name.) 



1902 (0100). 



Fig. 437. X 4. 

 (After Wickham.) 



MoLORCTiL's BiMACULATUs Say, Joum. Phil. Acad. Nat. Sci., 

 Ill, 1824, 428; ibid. II, 202. 



Elongate, subdepressed. Dull black, sparsely pubes- 

 cent with long grayish hairs. Elytra dull yellow, blackish 

 at tip and margin; antennse and legs reddish-brown. Tho- 

 rax subcylindrical, rounded at sides, much narrowed at 

 base, surface coarsely and rather densely punctate. Length 

 5-7 nun. (Fig. 437.) 



Throughout the State, common; less so in the 

 northern counties. April 12-May 27. Often 

 abundant on the flowers of the red haw {Cra- 

 fcegtis). Mating April 26 and May 27. Breeds in 

 hickory, maple, ash nnd dogwood. 



