TEXAN HYMENOPTERA. 269 



ochraceous, on raesothorax it is very short and sparse, except in front where it 

 is longer and more dense; wings dusky at tips; legs with short pale pubes- 

 cence, on tarsi beneath dense and yellow; abdomen broad, obconic, deeply 

 concave at base, sides of first segment and narrow apical margin of segments 

 1 — 5 with pale ochraceous pubescence; ventral scopa pale yellowish-white^ 

 Length .45 inch. 



Three specimens. (Belfrage.) Same size as optiva, but less 

 broad, with the pubescence of a different color. 



Megachile languinosa. 



Megachile languinosa, Smith, Brit. Mus. Cat. i., p. 190. 

 Twelve 9 specimens. (Belfrage; Boll.) This is probably the 9 

 of b rev is, Say. 



Megachile studiosa, n. sp. 



9- — Small, narrow, parallel, opaque black, head and thorax closely and 

 strongly punctured; head large, not broader than thorax, face and cheeks be- 

 neath with dense whitish pubescence; elypeus coarsely punctured, with short 

 sparse whitish hairs; mandibles large; vertex and cheeks with very sparse 

 pubescence; mesothorax and scutellum with very short and sparse black pu- 

 bescence; a small tuft on each side behind tegulse, another in front and an- 

 other beneath, of dense snow-white pubescence, on sides of metathorax, pro- 

 thorax and pleura the pubescence is long and whitish ; wings slightly dusky 

 at tips; legs slender, with short pale pubescence; abdomen as long as head 

 and thorax, sides parallel, above convex, shining, sparsely punctured, clothed 

 with short black pubescence, base broadly concave, apical margins of segments 

 1 — 5 with a narrow fringe of snow-white pubescence, that on first segment di- 

 lated laterally, apex obtuse; ventral scopa white. Length .38 inch. 

 Three specimens. (Belfrage.) 



Megachile osmoides, n. sp. 



9 . — Small, narrow, parallel, black, closely and rather coarsely punctured ; 

 head very large, nearly as large as thorax, very full behind eyes, the vertex 

 being unusually long; face and cheeks beneath with dense white pubescence, 

 on elypeus it is short and sparse, while on vertex it is still more so; middle of 

 vertex smooth and shining, with a few large scattered punctures; prothorax, 

 mesothorax anteriorly, a line over tegulae, scutellum posteriorly, metathorax, 

 and pleura anteriorly and posteriorly, more or less densely clothed with long 

 white pubescence; tegulae smooth and polished, black; wings hyaline; legs 

 with thin whitish pubescence; abdomen convex, shining, finely punctured, 

 sides parallel, base broadly concave, apical margins of segments 1 — 4 with a 

 narrow fringe of snow-white pubescence, dilated on sides of first, apex with a 

 very short dense pale sericeous pile, very dense on apical margin of last seg- 

 ment, which is obtusely rounded; ventral scopa pale yellowish. Length .33 — 

 .36 inch. 



£.— Head less enlarged behind eyes; face, elypeus and thorax laterally and 

 posteriorly more densely pubescent; apex of abdomen with four broad, promi- 

 nent, equidistant teeth, the two central ones truncate at tip. Length .33 inch. 



Four specimens. (Belfrage.) This resembles certain species of 

 Osmia very much in form. 



