196 Annals Entomological Society of America [Vol. VIII, 
Described from one female taken at Sabinal, Texas, April, 
1910; -by thelate- Ce Pract: 
Chlorotettix nacreosa n. sp. (Pl. XIX, figs. 9, 10). 
An uniform pearly white above and below in the female. Deep 
orange in the male. 5. to 5.5 mm. long, 1.6 mm. broad. 
Vertex flat, one-third broader between eyes than middle length, 
one-half longer on apex than at eye, three-fourths as long as pronotum, 
distinctly angulate, profile of face and vertex acute, lorae remote from 
margin of cheek. 
Color: @ pale, uniform grayish subiridescent white both dorsally 
and ventrally, the eyes green, spines on legs brownish, ovipositor dark, 
elytra faintly tinged apically with brownish, venation pale. co Uniform 
deep orange above and below, eyes green. 
2 Ultimate ventral segment twice as long as the preceding, twice 
as broad as long, posterior margin triangularly emarginate nearly one- 
half way to base. The outline broken by a pair of rounded, submedian 
lobes narrower and shorter than the lateral lobes and with their outline 
continued across the lateral lobe by a suture. 
& Valve strongly convex anteriorly, rounded posteriorly, twice as 
long as preceding segment, nearly two and one-half times as broad as 
long; plates one-fifth longer than broad, nearly two and one-half times 
as long as valve, transversely convex, the margin upturned, tips bluntly 
rounding, sub-truncate, equalling all but the brown apical styles of 
the pygofers. 
Described from eighteen females and four males, collected 
by the author, July 29-30, 1914, from Arundinaria tecta, at 
Clarksville, Tennessee. 
Chlorotettix vacuna n. sp. (Pl. XIX, figs. 22, 23). 
Size and general appearance of Balli, but with genitalia distinct. 
Length 6. to 6.5 mm., breadth 1.6 mm. 
Vertex convex, one and one-half times broader between eyes than 
middle length, one-third longer on middle than next eye, bluntly 
subangulate, margin thick. 
Color: Vertex, anterior margin of prothorax and the scutellum 
yellowish, tinged with green, prothorax brownish, elytra subhyaline, 
brownish, front tinged with orange, venter green. 
Q Ultimate ventral segment two and one-half times as long as 
penultimate, one and one-half times as broad as long, not te¢ctiform, 
but uniformly transversely convex from the lateral margins, closely 
applied to the pygofers, membranous, intricately rugose, lateral margins 
but little narrowed, the posterior angles distinct, the posterior margin 
occupied by a broad, sinuated, triangular excavation three-fourths 
to base of segment, the apical half of the excavation straight margined. 
