THE SHORT-WIXGED SCAVENGEIi BKKTLKS. 391 



densely and rather finely puuctate. Abdomen sparsely and finely punctate 

 above, more distinctly beneath. Length s-'.i.o mm. 



One in AVoleott collecti&u from beai-h of Lake Michigan near 

 Pine, Lake County. June li. Known from Michigan, Kentucky 

 and the northwest. 



XXXVI. AcTOBius Fauvel. 1875. (Ur., "shore + 1 live.") 



Small, slender, sparsely pubescent species having the last joint 

 of maxillary palpi conical, acute and longer than the next to last 

 joint; the first joint of hind tarsi e(|ual to or shorter than fifth. 

 The males have the front tarsi more or less dilated and the last 

 ventral emarginate. often feebly so. Twenty-three species are listed 

 from the United States. Of these the following have been taken or 

 probably occur in Indiana: 



KEY TO INDIAN; A SPECIES OF ACTOBIUS. 



a. Upper surface black or piceous. 



b. Elytra very densely punctured and opaque. 



V. Head opaque, very fiuely and densely punctured both abnve aud 

 below. 7.5.0. cI^•ERAScE^-s. 



cc. Head more or less shiuing. punctures ab.ive coarse and much less 

 dense. 

 (?. Thorax oval, very little lunger than wide. 



e. Elytra longer than thurax. the latter not narrower behind. 



750. NANUS. 



( c. Elytra not longer than thorax, the latter very plainly narrowed 

 behind. inutilis. 



do. Thorax oblong, much longer than wide ; elytra depressed, paral- 

 lel, longer than thorax. 7.57. fkateeculus. 

 bli. Elytra more or less shining, their punctures distinct. 



f. Thorax oblong, narrower behind, its punctures numerous, irregu- 

 larly placed; elytra distinctly lunger than thorax, paler at tips, 

 the punctures sparse and rather coarse. 75s. soBEixrs. 



ff. Thorax more or less oval, not narrowed behind, the punctures few- 

 er and arranged in three irregular rows each side. 

 g. Elytra finely and rather densely punctured ; larger, 5-6 mm. ; 

 luceous, the legs pale. 

 7i. Elytra very densely punctured; front tarsi of male very broad- 

 ly dilated. patella. 

 7(7|. Elytra shining, le.-s densely punctured: front tarsi of male 

 much less dilated. 7.59. loxatus. 

 (/(/. Elytra coarsely punctured : smaller, not over 3.5 mm. ; anterm;e 

 and legs pale. 7iiO. pabcus. 

 u(i. Bicolored species; thirax and legs always yellow. 



(■ Abdomen above and beneath rather densely punctured, feebly or not 

 at all shining. 



