Bees from New Mexico. 141 
bicoloured, as in prosopidis. ‘Uhe second and third segments 
of the abdomen are punctured alike. 
Hab. Santa Fé, N. M., July 10, three at flowers of Cactus 
radiosus, var. neomexicanus (Eng.), in Mr. Boyle’s garden ; 
they burrowed deeply down among the anthers. One at 
Colorado Springs, Colorado, middle of July. 
This species does not appreciably differ from H. prosopidis, 
at least in the female, except in the characters given above; 
yet I believe it is certainly a different species. I have a 
series of each, and the differences are constant; the bees also 
occur on different kinds of flowers in different life-zones. 
Heriades meliloti, sp. n. 
6. Length about 64 millim. 
Stoutly built; head large, seen from in front almost exactly 
circular ; eyes bicoloured green and black, face covered with 
white hairs; vertex with very sparse silvery hairs, shining, 
strongly but only moderately densely punctured; antenne 
not very long, flagellum only very feebly brown; mandibles 
deeply bifid at ends, the two teeth sharp, no indication of a 
third; thorax not densely but quite copiously white-hairy ; 
mesothorax with strong quite close punctures, similar punc- 
tures on scutellum not so close; tegule shining piceous; 
nervures and stigma black; wings hyaline; base of meta- 
thorax smooth and shining; small joints of tarsi rufescent ; 
abdomen with strong and tolerably close punctures, similar on 
the second and third segments; the narrow white hair-bands 
very distinct ; apex with four equidistant teeth, of which the 
two middle are the larger, but are not broadened. Venter 
with two white hair-bands ; subbasal projection not very large, 
hairy. 
Hab. Four in the Mesilla Valley, N. M., near Las Cruces. 
One was on Melilotus indica, on the College Farm, early in 
May ; two were on the College campus, Sept. 10, at the same 
spot as a lot of Plenoculus Cockerellit, Fox *. 
HM, meliloti differs from the male of H. prosopidis at once 
in its considerably larger size, the much larger head, and 
relatively shorter antenne. It is a somewhat larger insect 
than even the female of cactorum, so it is not likely to be its 
male, especially since it was found in a quite different locality. 
The male of H. osmotdes, Cresson, which I took at Colorado 
* The P. Cockerellii were flying rapidly over the sand only a few 
inches above the surface and burrowing in it. I saw two making a great 
fuss, and found they were struggling for the possession of a small cater- 
pillar. 
