260 THE UNIVERSITY SCIENCE BULLETIN. 



Erythroneura dorsalis (Gill,)- 



(PL 17, fig. 14.) 

 TypMoeyha ohliqua var. dorsalis Gill., Proc. U. S. Natl. Mus., xx, p. 757, 1898. 

 . Typhlocyba ohliqua var. dorsalis Van D., Trans. San Diego Soc. Nat. Hist., ii. p. 57, 

 1914. 



Typhlocyha ohliqua var. dorsalis DeL., Tenn. St. Bd. Ent., Bui. 17, p. 105, 1916. 

 Erythroneura ohliqua var. dorsalis Van D., Cat. Hemip. N. A., p. 715, 1917. 

 Erythroneura ohliqua var. dorsalis Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 118, 1919. 



Form: Length, 3 mm. Like ohliqua except that vertex seems to be pro- 

 portionally longer. 



Color: Yellowish or whitish, with a broad dark red stripe running 

 the length of the insect to the smoky apical cells of the elytra. In addi- 

 tion the costal margin of the wing, especially basally, is reddish, and 

 there are one or two dark spots before the transverse veins, just outside 

 of the red discal stripe. The face is red except for two broad white 

 stripes just below the margin of the vertex and whitish spots on the 

 lorag. 



External genitalia: As in ohliqua. 



Internal male genitalia: Styles as in ohliqua except apically where 

 they are entirely different, for instead of having one long curving apical 

 tooth, there are two much shorter and practically straight ones; connec- 

 tive V-shaped and as in ohliqua; oedagus very different from that of the 

 latter for the dorsal process is very much smaller, the main terminal 

 process is more slender, and has two apical and curving lateral processes, 

 and in addition the base of the oedagus bears a pair of very large and 

 conspicuous horn-like processes which extend laterad. The pair of small 

 ventral processes are present as in ohliqua. 



Distribution: The only specimens at hand are from Douglas 

 county. 



Hosts: Grape seems to be the common host of this species. 



The very clear differences in the tips of the styles and in the 

 whole structure of the cedagus, show clearly that this cannot 

 possibly be a variety of ohliqua. Its genitalia are very char- 

 acteristic and seem to be very constant, the specimens dissected 

 agreeing in every particular, as did those of typical ohliqua 

 among themselves. 



Erythroneura fumida (Gill.). 



(PI. 17, figs. 8-9.) 

 Typhlocyha ohliqua var. fumida Gill., Proc. U. S. Natl. Mus., xx, p. 758, 1898. 

 Enithroneura ohliqua var. fumida Van D., Trans. San Diego Soc. Nat. Hist., ii, p. 57, 

 1914. 



Typhlocyha ohliqua var. fumida DeL., Tenn. St. Bd. Ent., Bui. 17, p. 105, 1916. 

 Erythroneura ohliqua var. fumida Van D., Cat. Hemip. N. A., p. 715, 1917. 



Form: Length, 3 mm. Like ohliqua, except that vertex seems rela- 

 tively shorter. 



Color: Yellowish, but smoky throughout. Vertex and pronotum un- 



