256 



THE UNIVERSITY SCIENCE BULLETIN. 



Distribution: Occurs throughout the state where wild or cul- 

 tivated grapes are found. The following map shows where 

 specimens have been taken : 



Hosts: The nymphs seem to be confined to the grape. On 

 this host it is of great economic importance, as shown by the 

 bulletins listed in the above bibliography. The adults, how- 

 ever, are known to feed on almost any host that happens to be 

 convenient. It is frequently found on various trees, grasses, 

 and shrubs, though the grape is the favorite plant. 



Erythroneura comes var. ziczac Walsh. 



Erijthruiieiira ziczac Walsh, Proc. Bost. Soc. Nat. Hist., ix, p. 317, 1864. 

 Typhlocyba ziczac Woodw., Psyche, v, p. 214, 1889. 



Tupldocyba comen var. ziczac Gill., Proc. U. S. Natl. Mus., xx, p. 761, 1898. 

 Typhlocyba comes var. ziczac Osb., Me. Agr. Exp. Sta., Bui. 238, p. 156, 1915. 

 Typhlocyba comes var. ziczac DeL., Tenn. St. Bd. Ent., Bui. 17, p. 107, 1916. 

 Erythroneura comes var. ziczac Van D., Cat. Hemip. N. A., p. 713, 1917. 

 Erythroneura comes var. ziczac Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 116, 1919. 



Form: Like comes in size and structure. 



Color: Pale yellow, marked with red and reddish-brown. Vertex with 

 two reddish lonjjitudinal lines. Pronotum with lateral margins and a Y 

 on disc i-eddish or blood-brown. Scutellum with basal angles and tip 

 blood-brown. Elytra with a zigzag blood-brown line on basal half of 

 clavus, then to black spot at about middle of costal margin, from there 

 to dark spot just beyond apex of clavus, and then as a smoky band nearly 

 reaching black spot near tip of vving, the edges of this line and the spots 

 on tip of clavus sometimes red, as in comes. 



External genitalia: As in conies. 



Internal male genitalia: There seem to be slight differences between 

 the oedagus of this and typical comes, but seemingly not enough to make it 

 a distinct species. 



