2 ('.4 Mr. T. D. A. Cockercll — Descriptions and 



Megachile kalhtiuemiie, sp. \\. 



? . — Length nearly 11 mm. 



Black, short and broad, with cordate abdomen, and having 

 a white line of pubescence in front of scutellum, and spot on 

 each side, as in M. newelH^ to which it is closely allied. It 

 differs from newelli in being a little smaller, less robust, 

 creyer (from the pubescence), with whiter hair-bands, the 

 hair of face very white ; tiie last dorsal segment with obvious 

 pale pruinosity. It is evidently a desert representative of 

 the same stock (originally neotropical) wliich produced 

 newelli. The dusky wings, black hairs at sides of apex of 

 abdomen, and mesothorax in front with a widely interrupted 

 band of white hair, are characters separating it from the 

 hitherto undescrlbed female of M. toionsendiana, Ckll., the 

 latter having wings clear or almost, no black hair at sides of 

 apex of abdomen, and mesothorax in front with two spots or 

 bars of white hairs. 



Hah. Mesilla Park, New Mexico, at flowers of Kulhtrcemia, 

 July 27 (Cockerell) ; Mesilla, July 15, at flowers of Verbesina 

 encelioides {Cockerell) ; Las Cruces, New Mexico, at flowers 

 of Solidago canadeiisis, Sept. d (C. H. T. Toionsend). 



Females of M, townsendiana, taken in company with males, 

 are from Las C^ruces, Aug. 23. M. toicnsendiana was also 

 taken at San Augustine, at the base of the Organ Mts., New 

 Mexico. 



Megachile verhesince, sp. n. 



$ . — Length about 15 mm., width of abdomen 45. 



Black, parallel-sided, with white pubescence, and narrow 

 entire white abdominal hair-bands ; sixth segment with pale 

 tomentum ; ventral scopa entirely white ; clypeus shining, 

 with well-separated punctures, its margin straight, but with 

 a little dentiform prominence, not projecting at all below 

 the margin, in tlje middle. Thorax above without any con- 

 spicuous ])ale hair-markings. Superficially, tiiis species 

 looks just like M. heierodonta^ Ckll., except that the abdomen 

 is not quite so long and narrow. It is, however, entirely 

 distinct from heterodonta by tiie last dorsal segment, which 

 instead of being nearly vertical and covered with black 

 bristles, is subhorizontal and tomentose. The mandibles 

 also are not as in heterodonta, but have four ordinary teeth, 

 counting the inner angle. A closer real affinity is found 

 with M. casadcE, Ckll. ; but in that species the abdomen is 

 shorter, the sixth segment is strongly concave in profile, and 

 the hind basitarsus is not nearly so long and broad. (In 



