'■-i.yl FAMILY XI. STAPHYLINID.T:. 



(Kjl ( ). Tbichusa atea Casey. Trans. Acad. Sci. St. L., XVI, 1906. 



329. 

 I<''onn of the preceding but shorter. Deep black, shining, clothed with 

 sparse erect hairs ; legs pale ; antenna fuscous, paler at base, reaching base 

 of thorax, more slender. than in pariHoeps, second joint much longer than 

 third. Thorax one-half wider than long, sideg^ rounded into base, surface 

 minutely and sparsely jiunctate. Elytra one-half wider and longer than 

 thorax, the punctures more distinct than there. Abdomen parallel, as wide 

 as the elytra. Length 1.5 mm. 



Putnam and Lawrence counties; scarce. April IT-ilaj^ 12. 

 Taken by sifting woody debris. 



XIX. Atheta Thorns. ISoO. (Gr., "without place or position.") 



A large genus of small brown or blackish species having the head 

 usually narrmver than thorax, the latter never wider than elytra; 

 the body not clothed with prominent erect hairs as in Tricliiusa. 

 The following species from the State have been identified by Dr. 

 Feiiyes or are described as new. and there are also a half-dozen or 

 more unidentified ones at hand. 



KEY TO INDIANA SPECIES OF ATHETA. 



a. Eyes moderate or rather large in size, separated at most by less than 

 twice their long diameters. 

 J). Abdomen parallel or only very feebly narrowed behind the middle. 

 c. Tliird joint of antennae not, or only a little, shorter than second. 

 a. Thorax only very feebly transverse, about one-third wider than 

 long. 

 c. Middle cuxre almost contiguous: seventh dorsal segment of ab- 

 ilomen in male simple; color mostly black or piceous. 

 f. Front of head not Impressed. 

 (]■ Cheeks (gense) entirely margined. 

 h. Male with eighth dorsal segment of abdomen simple, the 

 sixth ventral truncate at tip. 062. palistris. 



Ml. Male with hind margin of eighth dorsal quadridentate. 

 the sixth ventral rounded at tip. 663. dichboa. 



(ig. Cheeks margined only behind ; elytra In part and legs dull 

 yellow. 664. ^MULA. 



ff. Front of head distinctly impressed. 665. caviceps. 



'■''. .Middle eox:e more widely separated ; sfveuth dorsal abdominal 

 segment of male with a blunt tulierclc at middle; elytra 

 wholly or in great part pale. 

 /. Thorax without a median iniprcsseil line; eleventh antennal 

 joint stout, conical, almost as long as joints S-IO together. 



666. dejN I A I'A. 



//. Thorax with a distinct median imi)resse(l line; eleventh joint 



not longer than 9 and 10 together. 607. sulcata. 



itih Thorax strongly transvei-sc. one-half or more wider than long. 



densely and rather coansely punctate ; abdomen pale at base. 



