1927] 
New Megachilid Bees 
121 
broadened, the middle tarsi densely whitish pubescent without; 
spurs reddish-testaceous; claws testaceous basally, ferruginous 
apically, without distinct basal teeth. 
Abdomen broad, sides subparallel, rather suddenly narrowed 
apically, pubescence ochraceous except for some short incons- 
picuous black pubescence on discs of segments 4 and 5; segments 
1-5 with entire, dense, whitish apical fasciae, broad on apical seg- 
ments, narrowed medially on the basal segments; punctures fine 
and close in general, well separated on discs of segments 4 and 5 ; 
segment 6 slightly concave at sides viewed from above, straight 
in profile, closely punctured, pubescence entirely light, largely 
subappressed, with scattered erect hairs basally; scopa white 
with a faint yellowish tinge, entirely black and short on segment 
6. Length 13 mm. 
Type: Male (Type No. 15714, Mus. Comp. Zool.); Camp 
Umatilla, W. T., Washington Territory June 26, 1882. Allotype; 
topotypical. Paratypes: 3 males, topotypical; 1 male, Little 
Spokane, W. T., July 26, 1882 (Samuel Henshaw, collector). 
This interesting species is quite similar to the type species of 
the genus, M. oenotherce Mitch., but is considerably larger and the 
pubescence is almost entirely ochraceous. In oenotherce the pubes- 
cence is white, with a patch of black hair on the mesonotum 
and the length is 9-10 mm. M. oenotherce $ was described as 
being 3-dentate, with a notch on the inner side of the second 
tooth. In umatillensis this notch is represented by a distinct 
though small tooth, and the apical tooth is much longer than in 
oenotherce. In the male the front tarsi are more dilated and hol- 
lowed out in this species and are distinctly pale in color, whereas 
in oenotherce they are but slightly dilated and hollowed out and 
are black in part. 
