190 FAMILY IT. CAKABID^E. 



356 (1146). STENOLOPHUS DISSIMILIS Dej., Spec. IV, 1824, 424. 



Resembles the preceding. Readily distinguished by the black head, 

 yellow thorax and black and yellow elytra. Thorax with narrower margin 

 and more rounded hind angles. Length 6-7 mm. 



Posey County; rare. November 8. 



LXX. ACLTPALPUS Latr. (Gr., "slender + palpus.") 



Very small oblong black or piceous beetles, distinguished from 

 Stenolopkus, with which they were formerly grouped, by the char- 

 acters given in generic key. The last joint of the labial palpi is 

 rather stoutly oval, but slender at tip. whence the generic name. 

 For literature see: 



LeConte.In Proc. Phil. Acacl. Nat. Sci., 1868, 377-378. 

 Horn. In Bull, Brook. Entom. Soe., VI, 1883, 15. 



Two of the five known species have been taken in Indiana. They 

 have but one dorsal puncture, as usual, on the second stria; hind 

 angles of thorax obtuse, somewhat rounded; frontal suture more 

 distinct than in the other forms. 



KEY TO INDIANA SPECIES OF ACt'PALPUS. 



a. Head brownish, scarcely narrower than thorax and almost as long ; eyes 



small ; elytra oval. 357. HYDROPICUS. 



fid. Head black or piceous, distinctly narrower than thorax; eyes larger, 



more prominent ; elytra oblong-oval, iridescent. 358. CABUS. 



357 (1149). ACUPALPUS HYDROPICUS Lee., N. Spec. N. Amer. Col.. 1, 1863, 17. 



Oblong-oval, convex. Head and thorax dark brown, strongly shining; 

 elytra piceous. the suture and narrow margins paler; antenme and legs dull 

 yellow. Thorax trapezoidal, a little broader than long, narrowed behind, 

 rounded on the sides only before the middle ; basal impressions broad, dis- 

 tinct, sparsely punctured. Elytral strire rather deep ; intervals subconvex. 

 Length 3 mm. 



Starke and Marshall counties; scarce. May 20-June 16. 



358 (1150). ACTJPALPUS CARUS Lee., N. Spec. N. Amer. Col.. I. 1863. IS. 

 Elongate-oval, subconvex. Thorax either dusky yellow or piceous; ely- 



tra piceous, iridescent; antennte dusky, the basal joints and legs pale. 

 Thorax subquadrate, a little broader than long; sides feebly curved from 

 apex to base ; hind angles rounded ; basal impressions rather deep, obso- 

 letely punctate. Elytral strife fine ; intervals flat. Length 2.5-3 mm. 



Throughout the State; frequent. March 26-October 17. Oc- 

 curs beneath bark and stones in damp localities. Easily distin- 

 guished from hydropicus by the narrower head, dusky antennfe and 

 less narrowed base of thorax. 



