320 NEARCTIC ERYTHRONEURA (hOMOPTERa) 



Erythroneura comes var. ziczac Walsh 



Ery I krone lira ziczac. Walsh, B. D. Fire-blight. Two new foes of the apple 

 and pear. The Prairie Farmer, 10, No. 10, Sept. 6, 1862, p. 149. [Illi- 

 nois.] 



Ground color pale yellow; sides of thorax and scutellura, and angiilate 

 vittae on tegmina running from humeri over middle of clavi, thence to inner 

 edges of costal plaques thence to cross-veins near radial margin, sanguineous 

 to dusky. Costal plaque pale yellow, more or less overlaid by white with an 

 oblique black streak posteriorly; costa both in front of and behind costal 

 phKjue pale yellow; apical cells chiefly dusky, paler within two and four, in 

 effect producing an irregular oblique dusky vitta from base of fourth cell to 

 apex of second. The vase-shaped saddle spot is marked with yellow at 

 least at apices of clavi. Lower surface stramineous to pale yellow. 



Length, 2.83 mm.; vertex: LM 7.5, LE 3.5, WA 13.5, WP 20.5, OA G.5, 

 OP 11, OH 16; pronotum: L 11, W 21; tegmen 13-59. Measurements from 

 a female, Plummer's Island, Maryland, July 19, 1914, (W. L. McAtee.). 



Other specimens (2.73 to 2.83 mm.) examined; from same lo^ 

 cality as measured individual, July, August, October, (W. L. 

 McAtee); Denver, Colorado, Sept. 11, 1914, (E. C. Jackson), [W. 

 L. M.]; Riley County, Kansas, July, (Marlatt), [U. S. N. M.]. 



Erythroneura comes var. ziczac, red form 



In this form the apex of scutellum, tips of clavi, two oblique streaks in 

 front of costal plaque, and other traces of comes type of markings (some of 

 them apparently overlaid by longitudinal dusky vittae) are red. 



Length, 2.7 mm.; vertex'LM 7, LE 4, WA 12, WP 19, OA 7, OP 10, OH 

 Ki; pronotum: L 10.5, W 21; tegmen 14-55. Measurements from a male; 

 Plununer's Island, Maryland, Dec. 14, 1913, (W. L. McAtee). 



Other specimens (2.67 to 2.87) examined from same locality as 

 measured individual, January, April, August, September, Nov- 

 ember, (W. L. McAtee, L. O. Jackson), [W. L. M.]; Michigan, 

 No. 1970, [U. S. N. M.]. 



Erythroneura comes var. cancellata new variety 



Vertex and pronotum dusky sanguin(H)us, the usual vittae barely distin- 

 guishable by their brighter red color; scutellum sanguineous except broad 

 median pale vitta, and bright red tif); on each t(>gmen a broad sanguineous 

 vitta from humerus to costal plaque and from costal plaque to cross-veins 

 near radial margin ; these vittae enclose (wi£h pale area on scutellum) a large 

 pale diamond-shaped saddle-spot, extending from base of scutellum to cross- 

 veins which is ornamented by bright red markings as follows; tij) of scutellum 

 and of clavus, a V-shaped marking on middle of each clavus, connected by 

 a short oblique streak to longitudinal sanguineous vitta near posterior en<l of 

 costal plafiue. Costal placjuc pale yellow, an oi)ii(|m> black streak posteriorly, 



