THE SHORT- WINGED SCAVENGER BEETLES. 



403 



joint twice the length of fourth. Thorax subcylindrical, widest one-third 

 from base; disk finely, evenly and densely punctate and with a narrow, 

 deep median impression just behind the middle. Elytra at base as wide 

 as head, slightly longer than wide, coarsely and regularly punctate. Length 

 4.4-5 mm. 



Floyd County; rare. October 9. Taken along the Ohio River; 

 also by .Dury at Cincinnati. 



779 (2304). Stenus colon Say, Trans, Amer. Phil. Soc, IV, 1834, 458; 

 ibid. II, 574. 



Elongate, rather slender. Black, shining; under surface piceous; ely- 

 tra each with a sublimate or triangular reddish-yellow spot behind the mid- 

 dle; legs dull yellow, the femora fuscous on apical third. Head slightly 

 more than twice as wide as long, deeply excavated and densely punctured 

 between the eyes ; antenna? not reaching middle of thorax, the third joint 

 one-half longer than fourth. Thorax widest at middle, densely and rather 

 coarsely punctate and with a short, narrow and deep impression just be- 

 hind the middle. Elytra at base much narrower than head, densely and 

 coarsely punctate. Length 3.6-4 mm. 



Described from Posey County. Known from Michigan, Vir- 

 ginia and other Southern States. Not represented in the collection 

 at hand. 



S. semicolon Lee, has the same range as the preceding and 

 doubtless occurs sparingly in Indiana, 



Division B. 



In addition to the complete spiral or whorl of united punctures, 

 the members of this Division usually have single, more or less iso- 

 lated punctures on the other parts of the elytra. Four species be- 

 longing here may occur in the State, though but three have been 

 taken. 



KEY TO INDIANA SPECIES OF DIVISION B. 



a. Legs black beneath. 



t». Elytra (along the suture) distinctly longer than thorax ; head as wide 

 as the elytra at base, deeply excavated between the eyes. 



780. juno. 



b~b. • Elytra rather shorter than thorax, the latter very robust; body de- 

 pressed. AUSTINI. 

 aa, Legs not black beneath; elytra slightly longer than thorax, the latter 

 widest at or just behind the middle. 

 c. Median impression of thorax beginning before the middle, narrow, 

 deep, conspicuous; elytra deeply, closely and irregularly channeled; 

 fifth ventral of male with a rounded notch at apex. 



781. FEMORATUS. 



