from Embudo, New Mexico. old 
(1) Perdita Townsend?, Ckll. 
Both sexes, Sept. 25 and 26. Known before only from 
the White Sands. 
(2) Perdita affinis, Cress. 
Known before only from Colorado. Many taken, Sept. 26. 
(3) Perdita rhodura, sp. n. 
? .—Length hardly 6 millim. 
Head and thorax dark olive-green, moderately hairy, face 
not hairy ; abdomen banded. Head ordinary, front strongly 
granular ; antenne dark brown, stripe on scape and flagellum 
beneath dull yellowish or ochraceous; labrum, mandibles 
(except tips), and face-marks white; sides of clypeus with 
large shallow punctures; lower half of clypeus white, the 
white extending upwards in three tooth-like projections, 
the lateral ones having the clypeal dots at their base; the 
upper outline of the white.on the clypeus is that of a W; 
lateral face-marks broad below, gradually tapering to a blunt 
point opposite the upper edges of the antennal sockets. 
Tubercles white at ends; mesothorax granular and sparsely 
punctured; tegule hyaline, with a dull white spot; wings 
hyaline, iridescent; nervures dark brown, stigma hyaline 
except margin, poststigmatal portion of marginal cell a little 
longer than substigmatal, second submarginal large, narrowed 
more than half to marginal, third discoidal distinct. Legs 
black ; trochanters, knees, anterior and middle tibiz in front, 
and anterior tarsi light yellow or yellowish white. Abdomen 
above with segments 1 to 3 white, 4 and 5 brownish orange ; 
segments 1 to 3 with piceous bands at base and hind margin, 
4 with similar but more suffused banding. Venter dull 
yellowish, becoming orange at apex. 
g.—Length 5 millim. 
Antenne bright lemon-yellow, funicle and flagellum 
(except last two segments) largely piceous above ; face all 
bright lemon-yellow up to the level of the length of the scape 
above insertion of antenne, the yellow including the ante- 
orbital black spots; labrum and mandibles (except extreme 
tips) lemon-yellow ; prothorax (except two spots anteriorly 
and quadrate patch on pleura) yellow; legs yellow, hind 
tibie behind and hind tarsi piceous; abdomen with the first 
segment piceous at base, but no well-defined bands, only 
suffused ones along hind margins of 1 and 2. 
Hab. Embudo, Sept. 25. Many specimens. 
