1915] New Species of Jassoidea 193 
white dot on the apex, a fuscous cloud on the disc, remainder of insect 
dorsally and ventrally, excepting the black upper half of face, an uni- 
form, pale yellowish brown, the cells of elytra, the pronotum and venter 
sometimes faintly infuscated. The macropterous form is the more 
infuscated. 
2 Last ventral segment of abdomen two and one-half times as long 
as penultimate, nearly twice as broad as long, distinctly angulate 
anteriorly with a second membrane excavated nearly to the base as in 
compactus, outer membrane strongly emarginate laterally from the 
base, exposing a rounded lobe of the inner membrane, the lateral angles 
obsolete, the posterior margin gently convex with a pair of median pale, 
fuscous triangles. 
co Valve convex, twice as broad as long, strongly convex on both 
anterior and posterior margins, the posterior margin subangulate; plates 
twice as long as valve, as broad as valve at base, as long as broad, 
strongly, concavely narrowing to the acute tips, which equal the apex 
of the pygofers. Pygofers distinctly broader than plates and set with 
coarse, infuscated bristles. 
Described from five males and two females taken September, 
1914, by the author at Clarksville, Tennessee, on Andropogon 
virginicus. In the macropterous form the elytra are much 
longer than the abdomen, while in the brachypterous form the 
elytra are distinctly shorter than the abdomen. 
Deltocephalus vicilinus n. sp. (Pl. XIX, figs. 5, 6). 
Resembling sylvestris, but smaller, male plates broadly truncated. 
2.4 to 2.6 mm. long, .7 mm. broad. 
Vertex flat, as long as width between eyes, one-half longer on middle 
than next eye, strongly angulate, long as pronotum, front very convex, 
clypeus tapering, rounded at apex, which exceeds the gene, pronotum 
twice as wide as long, venation as in sylvestris, elytra exceeding abdomen, 
narrowing posteriorly. 
Color: As in sylvestris, vertex pale greenish, with a median longi- 
tudinal pair of brownish stripes, apex, front margin, and the median 
stripe whitish, a curved fuscous line from apex toward the black ocelli, 
pronotum green, paler anteriorly with six pale, fuscous stripes, elytra 
pale olive green, infuscated apically, the venation pale, front infuscated 
gray with light arcs, clypeus and gene pale. 
2 Ultimate ventral segment one and one-half times as long as the 
penultimate, twice as broad as long, strongly convex anteriorly, posterior 
margin gently emarginate, the median third slightly subtruncately 
excavated. A transverse black line at middle. 
o Valve rounded posteriorly, three times as broad as long; plates 
distinctly broader than the valve, about three and one-half times as 
long as valve, nearly as long as broad, as broad as pygofers at base, side 
margins nearly straight, tips roundingly truncated, one-half as broad 
as base, a common triangular basal area yellow, margined with fuscous, 
pygofers slightly exceeding plates and densely clothed with coarse bristles. 
