96 



PRELIMINARY LIST 



mecllan dark line on the posterior three-fourtiis, and a small more or less distinct dark spot 

 on either side of the center close to the posterior margin. Ocelli hlack. Pronotum greenish 

 on the disc, the margin yellowish. Scutellum yellow. Elytra hyaline, nervures more or 

 less yellow. Venter and eyes pale yellow. Tibial spines arising from black spots, tips of 

 the tarsi infuscate. 



Male: Face, vertex, venter, and legs sulphur yellow. 



Length of female, 4.35 mm., of male 4 mm. Described from four males and one female. 



Steamboat Spl'ings, July 12th on Carex (Baker). 



Thamnotettix clitellaria Say. 



Custer County, midalpine (Cockerell, 10). 

 Thamnotettix 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-thirds as 

 broad; genae strongly depressed below the eyes, the outer margin strongly obtusely 

 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 poi-tion 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 (Clillette) . 



Thamnotettix ftavicapitata VanD. 



Colorado (VanDuzee, 4). 



Steamboat Springs, July 26th (Gillette). 



Thamnotettix Aavoniarginata n. sp. 



Pa.ee 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; geaae not distinctly depressed beneath the 



Det. VanDuzee. 



