394 



FAMILY XI. STAPH YLIXIDJE. 



762 (2252). Actobies jocosus Horn, Trans. Amer. Ent. Soc. XI. 18S4. 

 232. 



Elongate, slender, parallel. Color of preceding except that the elytra 

 are wholly black, and the antenna? brown, paler at base. Thorax oblong, 

 slightly narrowed behind, sides almost straight, punctate as in pwderoides ; 

 elytra much longer and more coarsely punctured than there, one-half longer 

 than wide. Length 4.5 mm. 



Lake County ; rare, June 15. Taken from beneath the prickly- 

 pear cactus. 



A. inutilis Horn. 3.5-4 mm.: A. patella Horn. 5 mm.; A. termi- 

 naMs Lee. 4.5 mm., and A. umljripennis Lee. 3.5 mm. in length; 

 all have a known range which might include Indiana in their dis- 

 tribution, but no one of them has as yet been noted within the State. 



Tribe III. XANTHOLLNINL 



Very slender, small or medium-sized species, having the head 

 usually equal in width to thorax and narrowed behind into a small 

 neck; antenna? elbowed, inserted close together near the middle of 

 the front margin of the front; thorax long and rectangular with 

 rows of punctures of which the outer ones are curved, its side mar- 

 gins double and thoracic spiracles visible. Of the seven genera 

 comprising the tribe, four are represented in Indiana. 



KEY TO IXDIANA GEXEKA OF XAXTHOLIXIXL 



(/. Antenna? strongly elbowed; edges of elytra overlapping at suture: mid- 

 dle coxa? widely separated. 

 b. Last joint of maxillary palpi long, not awl-shaped. 



XXXVII. Xanthounus. 

 bb. Last joint of maxillary palpi short, awl-shaped. 



c. Front tarsi broadly dilated : head densely strigose-punctate. 



XXXVIII. Leptolixus. 

 cc. Front tarsi not dilated. XXXIX. Leptacixes. 



a a. Antennae feebly elbowed; elytra not overlapping at suture, the sutural 

 stria deep ; thorax narrowed in front. XL. Diochus. 



XXXVII. Xanthomnus Serv. 1825. (Gr.. "yellow.") 



This genus, sufficiently characterized above, is represented in the 

 State by nine known species, while one other may occur. 



KEY TO INDIANA SPECIES OF XANTHOLINUS. 



a. Upper (outer) marginal line of thorax bent downward and united with 

 the lower -one at middle: thorax with dorsal rows of' five or six fine 

 punctures. 763. cephales. 



aa. Upper marginal line of thorax separate from the lower one nearly to 

 apex, not bent downward in front. 



