460 FAMILY XT. STAPH YLINIDiE. 



b. Legs black. 



c. Sides of thorax feebly rounded ; elytra pale, with suture, sides and 

 a narrow stripe black. majok. 



«■. Sides of thorax much rounded ; elytra wholly black. 



888. STYGICUS. 



66. Legs yellow. 



(/. Col(jr above wholly or in great part black or piceous. 

 c. El.vtra in part at least dull yellow. 



f. Suture and sides of elytra black. 889. vittatus. 



ff. Suture and outer apical angles black. fasciatus. 



ct: Ii:iytra wholly black ; under surface pale yellow. bicolor. 



del. Color above reddish-yellow. 



(/. Sides of elytra fuscous. 890. latekalis. 



gg. Spot on head, two (ru thorax and part of dorsal surface of ab- 

 domen, black. 891. occipitalis. 



0. fciiKii-alis Grav., 7-7. o mm. and 0. major Grav., 9 mm. in 

 length, have both been recorded by Dury from C'incinnati. 



888 (21192). OxYPORi's sTY(iU'iis ,Say. Trans. Amer. Phil. Soc, IV, 18;!4. 

 4.59; iliid. II, .575. 

 Elonsate. rather robust. Black, strongly shining ; antennse piceous, 

 joints 2 to .1 and the tarsi reddish-brown. Thorax widest at middle, thence 

 much narrowed to base, sides strongly jnunded; surface, as well as that of 

 head, smooth. Elytra together one-half wider and one-third longer than 

 thorax, each with a subsutural and two discal striiK, the former finely, the 

 latter more coarsely punctate, and witli a number of coarse, scattered punc- 

 tures intervening. Abdomen at base slightly narrower than elytra, smooth. 

 Length U.5-8..") mm. 



Southern half of State; frequent. June 11-Noveniber 4. 



889. (2(i9:-;). OxYPOEUs VITTATUS Grav., Mon. ("ol. Micr., IXOC, i;»5. 



Oblong, robust. Black or piceous. shining; elytra dull clay .vellow, the 

 suture and a stripe on sides, gradually widening from humerus to apex, 

 black ; legs and base of anteume reddish-yellow. Head slightly wider than 

 thorax, the base very tiiiely and sparsely i)unctate. Thorax one-half wider 

 than long, sides strongly curved, the base much narrower than apex, disk 

 smooth. Elytra one-third wider and distinctly longer than thorax, with a 

 sutural and two discal rows of rather tiue punctures and a number of 

 coarser scaltcrcd ones. Abdomen as wide as elytra, smooth, the tip of the 

 last segment pale. Length .".."i-O mm. 



Lake and Vigo counties; frequent. July 2-0ct()bei' 9. Occurs 

 especially in clumps of overlapping fungi at liase of gtumps. 



0. fasciaiiis Melsh. and 0. hivdlur Fauv., are in all probability 

 only color varieties of rillaius. 1 have included them in the key, 

 that the variation may lie noted, though authentic specimens of 

 neither are in the collection at hand, 



