W. L. MC ATEE 275 



Length, 2.73 mm.; vertex: LM 7.5, LE 3, WA 12, WP 18.5, OA 6, OP 11, 

 OH 15; pronotmn: L 10, W 19; tegmen 11-56. 



Specimens other than the type examined were collected at Plummer's 

 Island, Seven Locks and Beltsville, Maryland, and at Falls Church, Virginia, 

 (W. L. McAtee), (W. L. M.). 



Erythroneura vulnerata var. nigerrima new variety 



A darker form even than variety niger, the pale areas on clavus being 

 smaller, semi-hyaline and inconspicuous; in extreme examples there is only 

 a single pale point at two-thirds length of clavus, and one on corium near it, 

 besides the ]iale yellow costal jilarjue and paler costal area just posterior. 



Length, 2.G4 mm.; vertex: LM 6, LE 3, WA 10.5, WP 17, OA 5.5, OP 10, 

 OH 15; pronotum L 10, W. 19; tegmen 13-54. Measurements taken from 

 a female paratype; Maryland, near Plummer's Island, June 17, 1913, (W. 

 L. McAtee). 



Type — 9 (aliout 2.14 mm.); Maywood, Alexandria County, 

 Virginia, February 20, 1916, (W. L. McAtee), [W. L. M.]. Para- 

 types — Plummer's Island, Maryland, June and November, [W. 

 L. M.]; Fort Washington, Maryland, and Washington, Disti'iet 

 of Columbia, [U. S. N. M.]. 



Erythroneura obliqua Say 



T. [(itiyonia] nbliqua. Say, Thomas. Descriptions of new Hemipterous 

 Insects collected in the Expedition to the Rocky Mountains, performed 

 by order of Mr. Calhoun, Secretary of War, under command of Major 

 Long. Journal of the Academy of Natural Sciences of Philadelphia, iv, 

 1825, p. 342; The Complete Writings of Thomas Say on the Entomology 

 of North America, Vol. II, 1859, p. 259. [Engineer Cantonment on the 

 Missouri.] 



This sf)ecies and the following two forms, which may prove to 

 he no more than varieties of it, constitutes a group, easily recog- 

 nizable among Nearctic Erythroneura by the broad fourth apical 

 cell with smoothly curved base which joins radial margin at a 

 very acute angle (fig. 8) ; in addition practically all of the indiv- 

 iduals of the group have, in some form, two strong posteriorly 

 diverging longitudinal color vittae on vertex, which are often con- 

 tinued on pronotum. 



The known range of E. ohliqua extends from Quebec, Ontario 

 and Colorado to Virginia, Louisiana and California. The single 

 previously pul)Iished California record'' is supported, to a degree, 

 l^y the locality of var. auda hereafter descril)ed, which, however, 



■''Gillette, Am. Typhlocybinao, 1898, ]>. 757. 



TRANS. AM. ENT. SOC, XLVI. 



