North-American Bees. 445 
behind except at apex, middle femora with a black streak 
behind ; hind tibiz blackened outwardly on basal half; hair 
on inner side of basal joint of hind tarsi fuscous; abdomen 
of ordinary shape, minutely roughened, lemon-yellow, with 
the basal half of the first segment black, and the hind mar- ~ 
gins of all the segments ferruginous; sixth segment with a 
black spot at sides, overlapped considerably by fifth ; apical 
plate hairy, ferruginous, notched, but so slightly as to appear 
at first sight entire ; venter yellow varied with ferruginous, 
the last segment with a conspicuous patch of short white 
hairs. 
Hab. Corvallis, Oregon, June (Cordley). 
Received from Mr. Viereck. 
Nomada Cordley?, sp. n. 
fg .—Length 7 millim. 
Black with yellow markings and ferruginous stains; pecu- 
liar for its slender form, very long antenne, and subclavate 
abdomen, which, taken with the attitude and appearance of 
the hind legs, is somewhat suggestive of such flies as Syritta 
pipiens. ‘The hind coxe are long, and the arched hind 
femora look as if they proceeded from the abdomen. Face 
transversely oval, vertex very broad; eyes pale green; 
clypeus, supraclypeal region, and labrum thickly covered 
with silver-white hair ; mandibles simple; clypeus except 
two spots on upper border, lateral face-marks (broad below, 
continued as a line up orbital margin to level of antenne), 
labrum, mandibles except tips, line beneath eyes, and broad 
stripe on scape beneath, lemon-yellow; scape swollen, black 
except the yellow stripe ; third antennal joint extremely short, 
much shorter than filth, and less than half the length of 
fourth, which is much longer than fifth ; flagellum extremely 
long, black above, ferruginous beneath; thorax extremel 
densely punctured, hairy (the pubescence white), black 
without any yellow; tubercles and tegule largely dark 
brown. Wings iridescent, fairly clear, dusky on apical mar- 
gin; second submarginal cell unusually narrow, its side 
towards the third bulging; transverso-medial nervure joining 
discoidal a short distance from its base. Legs yellowish 
ferruginous, the femora and tibie (especially the hind 
ones) more or less black behind; abdomen yellowish ferru- 
ginous, with lemon-yellow spots on the sides of the segments ; 
basal half of first segment black, the other segments with 
broad black bands with suffused edges; hind margins of 
segments rather dark reddish ; apical plate emarginate ; venter 
