Messrs. T. D. A. Cockerell and W. Porter on Bees. 417 



black ; metathorax granular, dark bluish ; face yellow, yellow 

 extending above the antennas half the length of the scape, 

 but the dark colour sending angular projections into the yellow- 

 as far as the sockets of the antennaj; a yellow line (half the 

 length of the scape) runs up the anterior orbital margin a 

 short distance above the general level of the yellow ; a yellow 

 band extending halfway up on the posterior orbital margins ; 

 scape yellow, tipped at both ends with light orange ; flagellum 

 light orange, marked with black above near base; mandibles 

 M'ith light brown tips and margins; frontal foveje elongate- 

 oval ; cheeks unarmed ; tubercles yellow ; legs yellow, under- 

 side of hind femora black, the tarsi becoming brownish ; 

 abdomen above shining black, with a pale cream spot at each 

 side of segments 2, 3, 4, and 5, those on 5 smaller and more 

 nearly circular than those on 2, 3, and 4; wings clear and 

 iridescent. 



Redescribed from numerous specimens taken at Las Vegas, 

 N. M., at flowers of Cliamcesarncha coronopus, during the tirst 

 half of August. The male, in the table of Perdita in Bull. 

 Denison Lab. 1898, runs to P. salicifi, but has not a banded 

 abdomen. Perdita punctata {P. sexmaculata^ var. punctata^ 

 Ckll. Proc. Philad. Acad. 1896, p. 71) is a perfectly distinct 

 species. 



Macroteropsis, Ashm. 



Ashmead says of this, " palpi as in M icrotera, Smith." 

 Examining M. latior [Perdita latior, Ckll.) we find the labial 

 palpi 4-jointed, with the first joint longer than the remaining 

 three together, and very broad and flat, as in the long-tongued 

 bees, ending in a sharp claw-like point. The last three joints 

 are narrow and cylindrical, subequal in length, but the first 

 sometimes the longer, and the last the shorter, of the three. 

 The second joint is attached to the side of the first, well before 

 the end of the latter. The maxillary palpi are short, rather 

 pale, and 4-jointed, with variations to 5 and 6, owing to the 

 subdivision of the terminal joints ; in the 6~jointed form there 

 are three short joints, namely 3, 4, and 5. These palpi must 

 be regarded as in a subrudiinentary condition, which accounts 

 for their variability, as in the more extreme case of Geoperdita. 

 The tongue is narrow, with a blunt tip, and extends very- 

 little beyond the labial palpi. 



It had formerly seemed possible that Macroteropsis might 

 be the true Macrotera ; but this cannot be if Smith's descrip- 

 tion and figures are worth anything. A second species of the 

 genus is Macroteropsis texanus [Macrotera texana^ Cress. 

 Trans. Am. Ent. Soc. 1878, p. 70). 



