THE GRAIN AND BARK-GNAWING BEETLES. 665 



well as those of bend, rather tine and sparse. Elytra twice as long as wide, 

 slightly broader behind the middle, intervals subconvex, each with two rows 

 of distinct punctures. Length G nim. 



Vigo County; rare. February 14. 



*1274 (3843). TENEBKOIDES AMERICANA Kirby, Faun. Bor. Arner., 1837, 166. 



Oblong, moderately depressed. Black or piceous, shining; under sur- 

 face and legs dark reddish-brown. Head and thorax finely alutaceous. 

 rather sparsely and finely punctate; the latter two-thirds wider than long, 

 the margins reflexed, sides sinuate near base, hind angles acute. Elytra 

 elongate-oval, the strife shallow and rather finely punctate ; intervals slightly 

 convex, densely and distinctly rugulose, each with two rows of fine punc- 

 tures. Length 9-10 mm. 



Throughout the State, frequent; more so in the southern half. 

 February 4-September 5. Gregarious in winter. This is the spe- 

 cies usually listed as castanca, Kirby 's name having priority. 



1275 (3843a). TENEBROIDES LATICOLLIS Horn, Proc. Phil. Acad. Nat. Sci., 



1862, 86. 



Form of amcricana. Dark reddish-brown to piceous. Thorax twice as 

 wide as long, strongly depiessed; sides feebly curved, not sinuate, hind an- 

 gles more obtuse, less distinct. Elytral intervals very finely rugose. Length 

 7.5-8 mm. 



Posey County; rare. April 27. Listed as a variety of ameri- 

 cana but the much wider and shorter thorax, with smaller hind 

 angles, shows it distinct. 



1276 (3843b). TENEBROIDES OBSCURA Horn, Proc. Phil. Acad. Nat. Sci., 



1S62, 86, 87. 



Oblong, depressed. Pale brownish-yellow, shining. Head and thorax 

 sparsely and rather coarsely punctate ; the latter twice as wide as long, 

 sides feebly curved, but little narrowed behind the middle. Elytra oblong- 

 oval, the strife more strongly impressed and with coarser punctures than 

 in any of the preceding species ; intervals almost flat, very finely punctu- 

 late. Length 5 mm. 



Harrison County; rare. November 14. Usually considered a 

 variety of ami ricmia but appears to be very distinct. 



1277 (3845). TENEBROIDES BIMACULATA Melsh., Proc. Phil. Acad. Nat. Sci., 



II, 1844, 110. 



Oblong, subdepressed. Black, tinged with bronze, shining ; elytra each 

 with an irregular yellowish spot slightly in front of middle ; club of an- 

 tennas and tarsi yellowish. Thorax transverse, finely and densely punctate; 

 sides rounded, margin slightly reflexed. Elytral strife shallow, their punc- 

 tures obsolete on apical third. Length 5 mm. 



