AMERICAN HYMENOPTERA. 125 



Hfegachile deflexa. — '^.— Form broad, parallel; black, opaque, finely 

 and densely punctured; face and clypeus clothed with a long dense yellow 

 pubescence, on cheeks it is white and on vertex sparing and mixed with black; 

 mesothorax with a very short sparse black pubescence, while on the prothorax, 

 metathorax and pleura it is long and pale ochraceous; tegulse piceous; wings 

 dusky at tips; legs fulvo- testaceous, clothed with pale pubescence, coxse and 

 four posterior femora black, anterior coxae each with a short black spine, 

 their tarsi simple; basal segment of abdomen and narrow apical margin of 

 segments 2 — 5 clothed with pale ochraceous pubescence, base of these seg- 

 ments transversely depressed; sixth segment gradually narrowed to tip which 

 is truncate and incurved, and clothed beneath with white pubescence. Length 

 .55 inch. 



Hah. — Kansas, (Ridings). One specimen. Easily recognized by 

 the shape of sixth dorsal segment of abdomen. 



Megachnle fexana.^9 . — Form broad, robust; black, finely and closely 

 punctured; face, cheeks, thorax behind and beneath and basal segment of 

 abdomen densely clothed with whitish pubescence, on vertex and disk of 

 mesothorax and seutellum it is sparse, short and black; clypeus densely 

 punctured, with short fuscous pubescence; wings dusky on apical margin; 

 legs robust, with short pale pubescence, the tarsi broad at base, clothed be- 

 neath with dense yellow pubescence; abdomen broad, densely punctured, 

 clothed with short black pubescence longer on lateral margin, segments 2 — 5 

 with a narrow fringe of white pubescence at tip, apical segment with a short, 

 dense pale pile; ventral scopa pale yellowish- white, that on two apical seg- 

 ments black. Length .60 inch. 



'^.— Form broad, parallel; head slightly broader than thorax, the face and 

 clypeus with dense pale yellowish pubescence; anterior legs pale fulvous 

 within, their coxae each with a short black spine, their tarsi simple, slender, 

 fringed beneath with long white pubescence; abdomen subquadrate, closely 

 punctured, the segments much depressed at base and before apex; first seg- 

 ment clothed with pale pubescence, segments 2 — 5 with a short white fringe 

 on depressed apical margins and more or less broadly banded at base with a 

 dense pale pubescence, covering also the sixth segment, which is depressed, 

 the apical margin coarsely serrate and deeply emarginate medially; apical seg- 

 ment bisinuate or indistinctly tridentate; ventral segments narrowly fringed 

 at apex with white jjubescence. Length .50 inch. 



Hab. — Texas, (Belfrage). Seven specimens. The pubescence on 

 the two apical segments of venter is entirely black. 



Megachile generosa.— ?. — Form rather broad, subrobust; black, 

 o])aque, finely, not closely punctured; face, cheeks, thorax behind and be- 

 neath, and basal segment of abdomen rather densely clothed with white 

 pubescence, that on vertex, mesothorax except sides and seutellum except 

 behind, short, sparse and black; clypeus nude, shining, deeply punctured; 

 mesothorax dull, with the punctures on disk sparse and fine; wings dusky on 

 apical margin; legs with short pale pubescence, that on tarsi beneath dense 

 and yellow; abdomen shining, very finely punctured, clothed with short black 

 pubescence, segments 2 — 5 with a narrow white fringe on apical margin; 

 apical segment depressed at tip, with a short dense pale pile; ventral scopa 



