AHT. 28 REVISION OF DISONYCHA NORTH OF MEXICO — BLAKE 21 



median, and submarginal vittae, the median vitta tending to be 

 evanescent in some specimens from Michigan and Illinois; metaster- 

 num and tibiae more or less dark and tarsi dark. Head with interoc- 

 ular space more than half width of head ; interantennal space broad 

 and somewhat produced; frontal tubercles well marked; occiput and 

 front usually coarsely and often rugosely punctate; pale, usually 

 with occiput and often tubercles and labrum darkened ; labrum in 

 some specimens from North Carolina and Georgia pale. Antennae 

 robust, dark with paler basal joints, third and fifth joint subequal, 

 the fourth slightly longer. Prothorax scarcely twice as wide as 

 long, somewhat convex, with a callosity on either side in basal half 

 and a slight median basal depression; somewhat narrowed ante- 

 riorly with arcuate sides; surface somewhat shining, under high mag- 

 nification minutely alutaceous and finely and moderately densely 

 punctate; pale with two anterior spots usually well marked, lateral 

 ones and median stripe often paler brown, sometimes evanescent. 

 Scutellum dark. Elytra with sides parallel, somewhat convex, humeri 

 well marked with short intrahumeral sulcus; in female on lateral 

 apical half a faint trace of ridging such as occurs in the pcnsylvamca 

 group, but much shorter; surface finely alutaceous, finely and quite 

 densely punctate; vittae narrow, the submarginal and sutural 

 usually rather weakly uniting at apex; the median vitta in specimens 

 from about Lake Michigan often interrupted, sometimes almost en- 

 tirely disappearing. Body beneath densely and rather coarsely pu- 

 bescent, pale with metasternum in part darkened, tibiae more or less 

 dark, often pale with apex only dark, and tarsi dark. Length, 6.5 

 to 8.5 mm ; width, 3.5 to 4.5 mm. 



Type locality. — "Carolina" (as here restricted). 



Distribution. — Maine (Monmouth, Paris) ; New Hampshire (Can- 

 obie Lake, White Mountains) ; Vermont (Brattleboro, Burlington) ; 

 Massachusetts (Andover, Chicopee, Framingham, Ipswich, Ludlow, 

 Springfield, Wareham, Wilbraham) ; Connecticut; New York (Long 

 Island) ; New Jersey (Clementon) ; Virginia (Nelson County) ; 

 North Carolina (Dillsboro) ; South Carolina (Salem, Columbia, 

 Newry) ; Tennessee; Louisiana (New Orleans); Illinois (Chicago, 

 Grand Tower, Havana, Kahokia, Metropolis, Muncie, Topeka 

 Beach, Waukegan) ; Indiana (Millers, Pine, Turkey Hun) ; Ohio 

 (Camp Perry, Columbus, Cincinnati) ; Michigan (Berrien Springs, 

 Breedsville, Douglas Lake, Lewiston, Marquette, Monroe, Port 

 Huron, Toledo Beach) ; Minnesota (Lake Pelican, St. Anthony 

 Park) ; Wisconsin (Baldwin, Elkhorn, Hangen, Madison) ; South 

 Dakota (Perkins County) ; Kansas (Douglas County, Ellis County, 

 Hamilton County, Medora, Pawnee County, Rooks County, Russell 

 County, Wichita) ; Nebraska (Vf est Point) ; Oklahoma (Cleveland 



