98 
PRELIMINARY LIST 
Thamnotettix geminataY anD. Det. YanDuzee. 
Colorado (VanDuaee, 4). 
Dolores, June 18th (Gillette). 
Thamnotettix gillettei YanD. Det. YarDuzee. 
Colorado (Gillette—see YanDuzee, 2). Colorado (VanDuzee, 4). 
Steamboat Springs, July 26th (Gillette). 
Thamnotettix infuscata n. sp. 
Face about an eighth wider than long; clypeus one-fourtli longer than wide, not at all 
contracted in the middle, sides parallel, very slightly narrowed towards the tip, basal 
suture slightly curved; lorae as long and slightly 
more than one-half as broad as the clypeus; genae 
broad, somewhat concave below the eyes, outer 
margin evenly rounded; front scarcely longer than 
broad, four-fifths longer than the clypeus, gradually 
narrowing below, superior angle little greater than 
a right angle and rather pointed. Face and anterior 
half of vertex shagreened. Disc of vertex with a 
transverse median depression and with a small pit 
on either side basally close to the eyes, length at 
the middle once and two-tliirds that next the eyes, 
width between the eyes once and three-fourths the 
length at the middle. Pronotum eight-ninths 
wider than long, length once and two-tliirds that of 
the vertex, curvature five-elevenths of the length, 
smooth anteriorly, posterior two-thirds finely trans¬ 
versely wrinkled and with numerous scattered sub- 
obsolete dark punctures, posterior margin slightly 
concave,sides little longer than in T. atridorsum, and 
with a distinct carina. Scutellum finely shagreened, 
the transverse groove curved forwards. Last ven¬ 
tral segment with hind margin concave, posterior 
angles subacute, obliquely cut off. Color yellowish. 
Face and vertex smoky yellow. Pronotum dark 
with yellow anterior and lateral margins. Scutel¬ 
lum yellow, within the posterior angles smoky, two 
dark dots before the posterior line. Elytra dark 
smoky, subhyaline, darker on the shoulders, veins 
yellowish. Abdomen with segments black, mar¬ 
gined apically and laterally with yellow. Venter 
with two last segments and pygofers yellow. Legs 
sordid yellow, tips of tarsi infuscate, black spots 
at base of tibial spines. 
Length 6 mm. Described from one female. 
Estes Park, July 12th (Gillette). 
Thamnotettix kennicotti Uhl. 
Colorado (YanDuzee, 4). 
Fort Collins, May 8th; Spring Canon, May 11th (Gillette). 
Thamnotettix laeta Uhl. Det. YanDuzee. 
From mountains near Beaver Brook, August 6th (Uhler, 5). High mount¬ 
ains, June 19th to September 6th (Carpenter—see Uhler, 6). Colorado (Yan¬ 
Duzee, 4). 
Det. YanDuzee. 
