W. L. MC ATEE 311 



Key to the Color Var-ieties 



A. Upi)er surface with distinct color markings. 



B. Dominant markings sanguineous to dusky angukite vittae extending 

 from humeri to cross-veins; apex of clavus with a marking not in- 

 volved in the longitudinal vittae. 

 C. Sanguineous vitta extending from humerus to costal plaque, thence 

 to cross- veins; upper surface, from scutellum to cross-veins, occu- 

 pied by a pale diamond-shaped saddle spot traversed by red streaks. 



var. cancellata new variety, p. 320. 

 CC. Sanguineous to dusky vitta extending from humerus onto clavus, 

 leaving a pale area anterior to costal plaque; dorsal saddle spot 

 vase-shaped ornamented by red to yellow spots. 

 D. Color markings other than angulate vittae, yellow. 



var. ziczac Walsh, p. 320. 

 DD. Color markings other than angulate vittae, red. 



var. ziczac Walsh, red form, p. 320. 

 BB. Dominant markings otherwise, or if they are angulate vittae, they 

 are either not sanguineous to dusky, or not unicolorous, or not con- 

 tinuous from humeri to cross-veins. 

 C. Dorsal surface with dark markings other than the usual spots on costal 

 placjues and in the apical cells. 

 D. Tegminal vittae dusky, interrupted Ijehind costal placiue by a broad 

 transverse whitish hyaline area; pronotum and basal triangles 

 of scutellum ruby-red, apex of scutellum narrowly margined with 



black var. venusta new variety, p. 319. 



DD. Tegminal vittae or spots red to yellow. 



E. Scutellum without dark markings; spots on inner margins of 

 clavi black. 

 F. Tegmina whitish hyaline, almost lacking color markings. 



var. octonotata Walsh, p. 317. 

 FF. Tegmina with well developed color markings. 

 V G. Color markings red. . var. accepta new variety, p. 317. 



GG. Color markings yellow. 



var. accepta new variety, yellow form, p. 31S. 

 EE. Scutellum with dark markings. 



F. Scutellum with a median vitta, or the apex blac-k. 



G. Scutellum with a median black vitta sometim(>s dcvel()i)e(l 

 only basally; black spots on clavi; tegminal markings in 

 the form of spots. 

 H. Color markings red. . var. compta new variety, p. 318. 

 HH. Color markings yellow. 



var. compta new variety, yellow form, p. 318. 



GG. Scutellum with the apex and apical part of sides black; 



most of clavus and a band l)etween clavus and (-ostai 



plaques red var. axnanda new variety, p. 31!). 



FF. Scutellum with the basal triangles black; color markings roti. 



var. coloradoensis Gillette, p. 318. 



TRANS. AM. ENT. SOC, XLVI. 



