W. L. MC ATEE 281 



Plummer's Island, Maryland, July 10, 1914, (W. L. McAtec). Another 

 spprimen (2.8 mm.), same data (W. L. M.). 



Erythroneura obliqua var. fumida CJillette 



Ti/phlocyba obliqua var. funiida Gillette, C. P. Am. Typhlocybinae, 1898, p. 

 758. [Onaga, Kansas.]. 



This and the followino; variety of Erythroneura obliqua owe 

 their characteristic appearance to the chiefly dark dorsum of ab- 

 domen, and of underlying parts of scutellum and pronotum which 

 show through the wings and superficial layers of anterior parts, 

 giving the insects a more or less pronounced dusky appearance. 

 Besides this transmitted darkening the exterior surface may have 

 dark coloring of its own in addition to the usual color markings 

 of the species. 



In variety fumida the dark markings are chiefly in the form of 

 three transverse bands, an underlying one influencing appearance 

 of posterior part of pronotum and anterior part of tegmina, an- 

 other at about middle of tegmina, and the third an actual fu- 

 mose l)and across tegmina over cross-veins. Between these mark- 

 ings in the type specimen the tegmina are distinctly whitish; 

 costal plaques opaque whitish; the red vittae are wide, the scu- 

 tellum wholly red except for a central spot and the vittae on pro- 

 notum and vertex unusually heavy. 



The under surface of the type specimen also is unusually heav- 

 ily pigmented; the whole face except lower surface of vertex l)e- 

 ing red, pinkish laterally, the remaining lower surface slaty lirown, 

 with the edges of abdominal segments pale. 



A paratype has all the details of color pattern less pronounced. 



Length, 2.7 mm.; vertex: LM 6, LE 3, WA 11.5, WP 19; OA 5.5, OP 10; 

 OH 15; i)ronotum, L 10, W 19; tegmen 14-57. 



Type— 9 ; Onaga, Kansas; [No. 3445, U. S. N. M.] Paratype— 

 same data. 



A considerable number of specimens (2.9 to 3.03 nun.) of this 

 variety, collected at Mount Vernon, Virginia; Branch ville and 

 Plummer's Island Maryland; Anacostia, District of Columbia, 

 and at Oxford, Indiana, also, have been examined. The obscu- 

 ration of dorsal surface varies, the anterior two bands often more 

 or less fused; the color markings, also, vary in detail, the color 

 vittae on scutellum and anterior parts sometimes varying strong- 

 ly toward yellow. 



TRANS. AM. ENT. SOC, XLVI. 



