96 
PRELIMINARY LIST 
median dark lineon the posterior three-fourths, and a small 
on either side of the center close to the posterior margin. Ocelli black. Pronotum greenish 
on the disc the margin yellowish. Scutellum yellow. Elytra hyaline, nervures more 
less yellow.' Venter and eyes pale yellow. Tlbial spines arising from black spots, tips of 
the tarsi infuscate. 
Male: Face, vertex, venter, and legs sulphur yellow. 
Length of female, 4.85 mm„ of male 4 mm. Described from four males and one female. 
Steamboat Springs, July 12th on Carex (Bakei). 
Thainnotettix clitellaria Say. 
Custer County, miclalpine (Cockerell, 10). 
Thainnotettix emarginata n. sp. 
Face one-seventh wider than long; clypeus one-half longer than broad, sides parallel, 
apex rounded, basal suture nearly straight; lorae as long as the clypeus and two-thir Is as 
broad; genae strongly depressed below the eyes, the outer margin strongly obtuse y 
angled, attaining the tip of the clypeus, very narrow be¬ 
low the lorae; front one-fourth longer than broad, once 
and three-fifths the length of the clypeus, gradually nar¬ 
rowing below, rapidly near the clypeus, the superior 
angle broadly rounded. Face and anterior half of vertex 
finely shagreened. Eye distinctly and narrowly emargi- 
nate within at the antennae. Disc of the vertex flat, 
length at the middle once and a third that at the eyes, 
width between the eyes one and four-fifths times the 
length. Pronotum twice wider than long, the length once 
and three-fifths that of the vertex, curvature one-half of 
the length, indistinctly transversely wrinkled posteriorly, 
hind margin concave, sides short and very feebly cari- 
nated. Scutellum finely rugose, transverse groove curved 
forward. Color pale greenish yellow. Face pale yellow 
with a small speck on the genae next the lorae and a large 
spot beneath the antennae, black. Front slightly infus¬ 
cate, with about six pale dashes on each side. Vertex yel¬ 
low with a large dark spot near the compound eyes just 
within the hind margin. Pronotum yellow, disc darker. 
Scutellum unicolorous. Elytra smoky subhyaline, veins 
yellowish basally, smoky apically. Venter yellow, with the 
middle basal portion and narrow lateral margins of each 
segment, black. Pronotum and meso-sterna black. Legs yellow, bases of tibial spines 
and tips of tarsi blackish. 
Length 5 mm. Decribed from one male. 
Steamboat Springs, July 26th (Gillette). 
Thainnotettix flavicapitata YanD. 
Det. VanDuzee. 
Colorado (VanDuzee, 4). 
Steamboat Springs, July 26th (Gillette). 
Thainnotettix ftavomarginata n. sp. 
Face one-fourth wider than long; clypeus one-half longer than broad, sides concave, 
apex obtusely rounded, basal suture nearly straight, lorae subovate, three-fourths as 
broad and four-fifths as long as the clypeus; genae not distinctly depressed beneath e 
