W. L. MC ATEE 271 



BB. Vertex less pointed (figs. 3,4), coloration otherwise. 



C. Chief color markings small black or red dots; black dots in base of 

 fourth apical cell, one on middle of costa and another on corium 

 near middle of clavus, the latter usually ocellate with red. 



E. illinoiensis Gillette, p. 290. 

 CC. Chief color markings not small black or red dots. 



D. Tegmina with a complete transverse dark band, or chiefly red 

 with a large pale discal spot. 

 E. Broad band across tegmina at cross-veins and posterior half 



of thorax smoky to black E. morgani DeLong, p. 292. 



EE. Tegmina chiefly red with A large discal pale spot. 



E. hartii Gillette, p. 293. 

 DD. Tegmina otherwise; scutellum, adjacent parts of thorax, and 

 sometimes more or less of head smoky to black. 



E. scutelleris Gillette, p. 294. 



Group 5 



A. Posterior half of pronotum, scutellum and anterior third of tegmina 



yellow, pink or sanguineous E. basilaris Say, p. 294. 



AA. Coloration otherwise. 



B. Color pattern, when present (hyaline varieties exist), made up chiefly 

 of red, sanguineous or yellow irregular spots, some of which in vari- 

 eties are more or less fused E. maculata Gillette, p. 296. 



BB. Chief color markings, zigzag scarlet vittae from scutellum to cros.s- 

 veiiLs E. ligata new species, p. 301. 



Group 6 



A. Nearly the whole upper surface smoky brown to black. 



E. infuseata Gillette, p. 302. 

 AA. Upper surface colored otherwise. 



B. Upper surface with a large red saddle-spot, with reil to dusky cross- 

 bands, or chiefly red. 

 C. Anterior cross-band covering bases of tegmina. 



E. vitis Harris, p. 303. 

 CC. Anterior cross-band not covering bases of tegmina. 



E. tricincta Fitch, p. 30(5. 

 BB. Upper surface nearly colorless, or with a color pattern consisting of 

 irregular red to yellow spots of which three (the upper two sometimes 

 fused) are on clavus, and those on corium tend to be arranged in 

 three oblique series; these markings sometimes fused into red to dusky 

 angulate vittae; dorsum sometimes ornamented by black spots. 



E. comes Say, p. 310. 



TRANS. AM. ENT. SOC, XLVI. 



