THE SHOET- WINGED SCAVENGES BEETLES. 



399 



aa. Fourth joint of maxillary palpi very small; outer margin of thorax not 

 acute in front of middle. 

 b. Thorax elongate-oval, the sides rounded into base and apex. 



774. LONGICOLLIS. 



hi). Thorax with distinct angles. 



c. Punctures of thorax confused, and confined to the sides; reddish- 

 brown, elytra piceous with sides and tips yellowish. 



775. RUFICOLLTS. 



cc. Punctures of thorax in dorsal rows ; color piceous or black. 

 d. Punctures of dorsal rows 8-10 in number ; legs pale. 



NIGRITULUS. 



dd. Punctures of dorsal rows 12-14 in number; legs dark. 



SERIATUS. 



773 (2284). Leptacinus flavipes Lee, N. Sp. N, A. Col.. I. 1863, 41. 

 Elongate, slender. Head and abdomen blackish-piceous. shining ; thorax 



and elytra dark reddish-brown ; antennae brown, paler at base ; legs reddish- 

 yellow. Head longer than wide, with rather dense elongate punctures on 

 sides and base. Thorax oblong-oval, rather sparsely, evenly and finely punc- 

 tate on the sides, smooth at middle, the dorsal rows with 12-16 punctures. 

 Elytra as wide and long as thorax, sparsely and finely punctate. Abdomen 

 finely and rather densely punctate. Length 4-4.5 mm. 



Putnam County ; frequent locally. March 20-April 22. Sifted 

 from vegetable debris. 



774 (2287). Leptacinus longicollis Lee, N. Sp. X. Amer. Col.. I, 1863. 41. 

 Elongate, very slender. Dark reddish-brown to piceous, shining, sparsely 



clothed with erect hairs; legs and base of antenna? paler. Head one-half 

 longer than wide, its surface, as well as that of thorax and elytra, finely 

 and sparsely punctate. Thorax one-half longer than wide, but feebly nar- 

 rowed behind, disk with a smooth space at middle. Elytra slightly wider 

 and distinctly shorter than thorax. Abdomen slightly narrower at base 

 than elytra, thence gradually broadening, the fifth dorsal distinctly wider 

 than first ; surface finely and rather closely punctate. Length 3-3.3 mm. 



Clark County; rare. May 6. Occurs beneath stones, often in 

 ante' nests.. 



775 (2290). Leptacinus euficollis Lee. N. Sp. N. Amer. Col.. I. 1863. 42. 

 Elongate, slender. Head and abdomen piceous; antenme, thorax and 



legs pale reddish-brown. Head longer than wide, alutaceous, coarsely and 

 evenly punctate. Thorax one-third longer than wide, with a broad, smooth 

 space at middle. Elytra with four or five somewhat irregular rows of fine 

 punctures. Abdomen very slightly widening from base to apex, finely and 

 sparsely punctate. Length 4-1.5 mm. 



Putnam County; rare. April 22. Probably occurs sparingly 

 throughout the southern half of State. 



L. nigritulus Lee. 3.5 mm., and L. seriatus Lee. 4.8 mm. in 

 length, were both described from Detroit and Canada, and probably 

 occur in the northern third of Indiana. 

 [26—23402] 



