THE LONG-HORNED WOOD-BORING BEETLES. 



1093 



0. gracilis Fab., antennas fuscous, legs pale, tips of tibiae and 

 tarsi darker, length 10-13 mm., is known from New York, New Jer- 

 sey and southward. 



2015 (6505). Oberea ruficollis Fab., Ent. Syst, II, 1775, 311. 

 Elongate, sub-cylindrical, rather robust. Pale reddish-yellow ; antennae, 



elytra, tibiae and tarsi nearly black. Thorax short, about as broad as long, 

 without discal black spots. Elytra rather densely clothed with gray pubes- 

 cence and with irregular rows of moderately fine oblong punctures ; tips 

 subtruncate. Length 15-18 mm. 



Vigo County; rare. June 19. One specimen taken on the wing. 



LXXI. Tetrops Steph. 1839. (Gr., "four + eyes.") 



This genus, sufficiently characterized in the key, is represented in 

 the State by a single species. 



2016 (G507). Tetrops monostigma Hald., Trans. Amer. Phil. Soc, X, 



1857, 57. 



Elongate, slender, cylindrical. Black, shining; elytra with black, re- 

 cumbent and erect hairs; head and thorax red. the latter with black spot 

 on disk ; femora reddish-yellow ; antennal joints paler at base, pilose with 

 long hairs. Thorax feebly constricted before and behind, sparsely and 

 rather coarsely, punctured. Elytra with rows of rather closely placed, 

 coarse and deep punctures; tips rounded. Length 7-9 mm. 



Dubois and Spencer counties ; scarce. May 22-May 24. Taken 

 by sweeping low herbage along roadsides. The middle trochanters 

 of male are very strongly developed. T. jucunda Lec. is doubtless 

 a synonym, the legs in the specimens at hand varying from wholly 

 black to almost wholly reddish-yellow. 



LXXII. Tetraopes Serville. 1835. (Gr., ' < four + eyes.") 



Medium-sized, stout-bodied species, having the antenna? shorter 

 than body ; thorax armed with a blunt tubercle each side and, in our 

 species, marked with four round black spots. They occur altogether 

 on the different species of milkweed (Asclepias) , in the stems and 

 roots of which they breed. Four of the eight known species have 

 been taken in the State. 



KEY TO INDIANA SPECIES OF TETRAOPES. 



a. Elytra with a common median and apical heart-shaped black space; 

 disk of thorax red, regularly convex. 2017. caxteriatoe. 



aa. Elytra with rounded or elongate black spots ; disk of thorax distinctly 

 elevated. 



6. Antenna} black, not annulate: abdomen very sparsely punctulate; 

 larger median spot of elytra oblong. 2018. tetraophthalmus. 



