92 THE ENTOMOLOGIST. 
NEW. AMERICAN BEES.—VIII. 
By T. D. A. CockERELL. 
Nomada vexator, n. sp. 
?. Length, 7 to 8 mm.; ferruginous red; head, thorax, and 
legs marked (not heavily) with black, but with no yellow; abdomen 
shining light ferruginous, with no black except three spots (one basal 
and two lateral) on first segment, and even these sometimes hardly 
developed ; second abdominal segment with a variable but always 
large cream-coloured patch on each side; third segment with much 
smaller spots, sometimes reduced to dots ; fourth with two transverse 
subdorsal spots, sometimes absent; fifth with a pair of large spots, 
usually confluent; apex with a rather narrow band of silvery tomen- 
tum. Antenne entirely clear ferruginous, third joint a little longer 
than fourth, flagellum rather thick; mandibles simple ; first joint of 
labial palpi much longer than the other three united ; middle of face, 
connecting with a large area enclosing ocelli, and hind part of cheeks, 
black ; scutellum strongly bilobed; mesothorax very densely punc- 
tured, with a median black band, broadening anteriorly; metathorax 
with a black band, and its sides with white hair; tegule bright 
ferruginous; wings dusky hyaline, clear subapically and strongly 
dusky at apex; stigma ferruginous, nervures fuscous; b.n. meeting 
t.m.; second s.m. large, receiving the r. n. far beyond its middle; 
third s.m. narrowed greatly above; tibie and tarsi without black, 
but the femora marked with black, especially the hind ones; venter 
of abdomen red without markings. In my table of Rocky Mountain 
Nomada (Bulletin 94, Colo. Exp. Sta.) this runs nearest to N. luteo- 
picta, but differs in the proportions of the antennal joints, and the 
‘pale yellow abdominal markings. The same characters, and the 
venation (b. n. meeting t. m.) readily separate it from N. cymbalarie 
and N. mera, which run to the same point in the table. In many 
respects N. vexator resembles N. accepta, but the abdomen is much 
darker and more copiously ornamented with cream-colour in accepia, 
while the mesothorax is three banded, and there are yellow spots at 
the lower corners of the face. 
3. Length, 7mm.; head and thorax black, without any red ; 
both densely punctured, and with quite abundant white hair, which 
is appressed and bright silvery on face; thorax with no light mark- 
ings except a cream-coloured spot on the tubercles; clypeus with the 
lower half (narrowest in the middle), lateral marks sending linear up- 
ward extensions to level of antenns, scape in front, labrum, and 
mandibles except apex, light yellow; third antennal joint about as 
long as fourth on upper side, but much shorter below ; scape and first 
four joints of flagellum black above, remaining joints showing succes- 
sively decreasing infuscation: legs red, anterior and middle femora 
black basally beneath, hind femora black with the apex red; second 
s.m. narrower than in female, receiving r. n. in middle; abdomen 
marked nearly as in female, but basal half of first segment nearly all 
black, and blackish transverse stains on third and fourth; apical seg- 
ments with thin white pubescence; apical plate very narrow and 
