1927 ] 
New Megachilid Bees 
107 
appressed and best seen in profile, on either side of this the 
the surface is covered with subappressed white pubescence, while 
the extreme tip is clothed with dense appressed fuscous pubes- 
cence, segment with erect black hairs across the base, conspicuous 
at sides; scopa yellowish- white, black on segment 6, and with a 
small tuft of black hairs at extreme sides of segment 5. Length 
13 mm. 
Type: Female (Type No. 15707, Mus. Comp. Zook); Austin, 
Texas, May 8, 1901 (C. T. Brues, collector). 
Megachile wheeler! n. sp. 
$ . Head broad, eyes subparallel, pubescence greyish-white 
on face, thin and white on cheeks, long and black or fuscous on 
vertex, extending down on cheeks for a short distance; supra- 
clypeal plate quite closely punctured, shining spaces between 
the punctures medially; clypeus with punctures close above and 
laterally, more separate in middle where the surface is shining, 
apex entire, smooth and impunctate, thickened on the edge 
which is slightly grooved; mandibles broad, reddened apically, 
sparsely punctate above, 4-dentate, the three apical teeth sub- 
equal in size and rounded, the inner one acute, a slightly in- 
curved bevelled edge between the two inner teeth; cheeks about 
as broad as eye, shining, the punctures rather large but shallow, 
quite close, finer, closer and deeper above; vertex shining, nearly 
flat, with punctures well separated in general, close along edge 
behind ocelli; lateral ocelli slightly nearer edge of vertex than 
to nearest eye; front below ocelli densely punctured; antennse 
black above, obscurely reddened below, middle joints but slightly 
longer than broad. 
Thorax white pubescent at sides and behind, largely black 
on mesonotum and scutellum, whitish on mesonotum anteriorly 
and on scutellum posteriorly; mesonotum quite deeply and 
closely punctured, but the punctures well separated in center 
where the surface between them is shining; scutellum closely 
and finely punctate; pleura very closely and finely punctate 
above, the punctures larger and not so much crowded below; 
sternum with large, rather close punctures; propodeum with 
