1927] 
New Megachilid Bees 
115 
rounded, slightly concave in profile also, but so slightly as to be 
hardly noticeable, with no erect hairs visible in profile, finely and 
closely punctured, pubescence appressed, yellowish- white, more 
or less reddened medially to apex, hiding the surface on apical 
half, thin basally, with scattered inconspicuous erect black hairs 
at sides; scopa entirely yellow, but with a few lateral dark hairs 
on segment 6. Length 13 mm. 
Type: Female (Type No. 15719, Mus. Comp. Zool.); Oak 
Creek Canyon, Arizona, 6000 ft. altitude, Aug. (F. R. Snow, 
collector). Paratype: 1 female, topotypical. 
In mendica s. str. the pubescence of segment 2 is black on the 
disc, and that on segment 6 is entirely dark, while in this form 
the pubescence of segment 2 is pale, and segment 6 is covered 
over most of its surface with whitish appressed pubescence. 
Otherwise the two forms are very similar. 
Megachile laurita n. sp. 
$ . Head broad, eyes subparallel; supraclypeal plate close- 
ly and finely punctured, with some shining impunctate spaces 
medially; clypeus rather coarsely punctured, the punctures more 
separate medially, crowded above and at sides, apex thickened 
medially, the upper margin slightly but broadly produced me- 
dially; mandibles broad, reddish apically, coarsely striately 
punctate above, very closely and finely punctate on outer face at 
base, striately punctate medially, 3-dent ate, the apical tooth 
bluntly rounded (apparently worn), the subapical tooth sub- 
acute, the cutting edge long, with an upper and an under carinate 
margin, but not much hollowed out between the two, the upper 
one broadly incurved, the under one more nearly straight; cheeks 
broad, closely punctured above, sparsely so below where the 
surface is finely tessellated; vertex slightly rounded, punctures 
mostly well separated, very fine and close between ocelli; lateral 
ocelli about equally distant from eyes and edge of vertex; front 
below ocelli densely punctured; antennae dark above, reddish 
below, somewhat flattened, short, the middle joints fully as 
broad as long; pubescence fuscous on cheeks and vertex, some 
pale hairs intermixed on the vertex, and occiput largely fringed 
