536 Descriptions and Records of Bees. 



behind very long ; no fuscous hair on thorax above ; keel of 

 sixth abdominal segment jagged on each side of the rounded 

 emargination ; apical teeth of abdomen five, the median one 

 well developed, the lateral ones small, a trifle nearer to the 

 sublateral than the sublateral are to each other. The 

 abdomen has conspicuous dark hair on segments 3 to 5. 

 The scutello-mesothoracic suture is wholly without a light 

 band. 



Hab. Los Angeles County, California {Coquillett). U.S. 

 National Museum. 



I describe this as a subspecies of M. mendica, but it is 

 equally close to 31. hrevis, and until the female is known we 

 cannot be sure which it should be associated with. Males 

 collected by Snow in Arizona, which I consider to represent 

 a variety of brevis, resemble coqidlletti in their rather large 

 size and ochreous hair, but they have dark anterior tarsi, 

 and the keel of sixth segment only faintly crenulate on each 

 side of the emargination. 



Megachile penicillata, sp. n. 



? . — Long and narrow, with the general form and appear- 

 ance of M. occidentalis. 



Black, including the tarsi, mandibles, and antennse ; 

 wings strongly fuscous. Head large, rounded ; eyes promi- 

 nent, chocolate-colour ; mandibles quadridentate (quinque- 

 dentate in occidentalis) ; labriim broad at apex, with two 

 pencils of red hair directed forwards (vertically to plane of 

 labrum) ; clypeus strongly subconfluently punctured, with 

 a slender smooth median line, lower margin very broadly 

 but shallowly excavated, or it could be described as straight, 

 with a broad low lobe at each side ; sides of face, and region 

 above and between antennae, with copious greyish-white 

 hair; hair of clypeus extremely thin, but not fuscous; 

 region behind ocelli large, with strong quite close punctures ; 

 mesothorax strongly and extremely densely punctured, with 

 very short and sparse pale hair, but a pair of oblique bars of 

 dense white hair (as in occidentalis, but not so large) in 

 front, a light band along lateral margins, and a thin one in 

 scutello-mesothoracic suture ; tubercles densely covered with 

 creamy-white hair ; tegulae rufo-piceous. Legs with white 

 hair, pale yellowish on inner side of tarsi; hind basitarsi 

 very slender. Abdomen parallel-sided, strongly but not 

 densely punctured, with narrow white hair-bauds on the 

 first four segments, that on first practically reduced to large 

 triangular lateral patches; sixth segment broadly hoary at 



