260 THE UNIVERSITY SCIENCE BULLETIN. 



Erythroneura dorsalis (Gill.). 



(PI. 17, fig. 14.) 



Typhlocyba obliqua var. dorsalis Gill., Proc. U. S. Natl. Mus., xx, p. 757, 1898. 

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

 1914. 



Typhlocyba obliqua var. dorsalis DeL., Tenn. St. Bd. Ent., Bui. 17, p. 105, 1916. 

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

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



Form: Length, 3 mm. Like obliqua 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 

 lorae. 



External genitalia : As in obliqua. 



Internal male genitalia: Styles as in obliqua 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 obliqua; 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 obliqua. 



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 oedagus, show clearly that this cannot 

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

 acteristic and seem to be very constant, the specimens dissected 

 agreeing in every particular, as did those of typical obliqua 

 among themselves. 



Erythroneura fumida (Gill.). 



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



Typhlocyba obliqua var. fumida Gill., Proc. U. S. Natl. Mus., xx, p. 758, 1898. 

 Erythroneura obliqua var. fumida Van D., Trans. San Diego Soc. Nat. Hist., ii, p. 57, 

 1914. 



Typhlocyba obliqua var. fumida DeL., Tenn. St. Bd. Ent., Bui. 17, p. 105, 1916. 

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



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

 tively shorter. 



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



