Bees from New Mexico. 403 



triangular, without a rim, very feeble, longitudinally plicate 

 at the sides of the extreme base ; tegulfe dark testaceous ; 

 wings hyaline, faintly but quite noticeably smoky at apex ; 

 nervures dark brown, stigma black ; third submarginal cell 

 long, narrowed more than half to marginal ; legs black, with 

 pale pubescence ; small joints of tarsi clear ferruginous ; basal 

 joint of middle tarsus broadened ; spurs white ; abdomen 

 rather broad, microscopically tessellate, with a sericeous 

 lustre j all the segments with apical bands of long white 

 hair^ that on the first very thin, on the others very dense j 

 apical pubescence also white. 



Hah. San Ignacio (between Las Vegas and Beulah), N. M., 

 Sept. 1, 1899 {Wilmatte Porter). 



Closely related to A. nubecula, Smith, but the cloud at the 

 apex of the wings is not nearly so dark, the first abdominal 

 segment has a hair-band (wanting in nuhecula\ and the size 

 is a little larger. Perhaps it is only a geographical race of 

 A. nubecula, which inhabits Canada and the U. S. east of 

 the plains, coming as far west as Lincoln, Nebraska, whence 

 I have specimens collected in August and September, sent by 

 Prof. L. Bruner. The type specimen of ^. xanthigera has 

 the sides of the metathorax and the hind femora and tibite 

 heavily loaded with orange pollen, doubtless gathered from 

 one of the CompositjK. A Lincoln nubecula is loaded in 

 exactly the same way. 



Andrena alhovirgata, sp. n. 



? . — Length about 7^ millim. 



Similar to A. xanthigera, but differing in the basal process 

 of the labrum having only a shallow gently rounded emar- 

 gination ; the stigma light brown; the wings not clouded at 

 apex; the first abdominal segment with the band thinner or 

 reduced to some scattered hairs ; the shining disk of raeso- 

 thorax with weaker excessively minute punctures. 



Hah. San Ignacio, N. M., Sept. 1, 1899; two {Wilmatte 

 Porter). They carry a very small amount of orange-yellow 

 pollen. 



Andrena apacheorum, Ckll., 1897, var. a. 



? . — Length about 9^ millim. 



Black, with dull white pubescence, except at the apex of the 

 abdomen, where it is greyish brown, and on the tibi» and 

 tarsi, where it is mostly brownish grey. Facial quadrangle 

 broader than long ; vertex dull and granular ; front striated ; 

 antennae obscurely brown beneath towards tips; clypeus 



26* 



