38 ANPHENIDiE. 



pubescence ; the mandibles ferruginous ; the flagellurn of the an- 

 tennae fulvous beneath. Thorax closely punctured; the meta- 

 thorax finely rugulose at the base, the margin of the truncation 

 smooth and shining ; wings hyaline, the tegulae and nervures pale 

 rufo- testaceous ; legs rufo-piccous, with the tarsi rufo-testaceous. 

 Abdomen with a short pale pubescence, the apical margins of the 

 segments pale testaceous. 



Ilab. Mexico, Oajaca. 



This species closely resembles H. tumulorum of Europe. 



25. Halictus politus. 



Female. Length 4| lines. — Black ; head and thorax opaque, ab- 

 domen shining. Head very closely punctured and thinly covered 

 with hoary pubescence ; tips of the mandibles rufo-piceous. The 

 mesothorax and scutellum very closely punctured ; the postscu- 

 tellum and sides of the metathorax with pale ochracoous pubes- 

 cence; tho base of the metathorax irregularly longitudinally 

 striated and posteriorly truncate ; wings pale fnlvo-hyaline, the 

 nervures pale rufo-testaceous ; the legs with dark fuscous pubes- 

 cence. Abdomen obscure reddish brown, with a band of pale 

 tomentum on the basal margins of the second, third, and fourth 

 segments. 



Male. Has a close resemblance to the female: the apex of the 

 elypeus yellow, the head and thorax opaque, the wings with a 

 fuscous cloud at their apex ; the abdomen banded as in the female. 



Hob. Mexico, Oajaca. 



26. Halictus desertus. 



Female. Length 3| lines. — Black ; head and thorax opaque, ab- 

 domen shining. Head rotundate, the elypeus very slightly pro- 

 jected ; very closely and finely punctured ; tho face and cheeks 

 with thin hoary pubescence. Thorax closely and finely punctured, 

 having thin hoary pubescence ; the base of the metathorax very 

 finely rugulose ; wings subhyaline, the nervures testaceous, the 

 tegulee shining black ; tho tibiae and tarsi with pale fulvous pubes- 

 cence. Abdomen shining and very finely and very closely punc- 

 tured ; the basal margins of the second, third, and fourth segments 

 with bands of whitish tomentum. 



Male. About the same length as the female, but more slender ; 

 the head opaque ; the apical half of the elypeus white, smooth, and 

 shining. Thorax closely punctured, slightly shining ; the meta- 

 thorax with irregular fine striae; wings hyaline and iridescent, 

 slightly clouded at their apical margins. Abdomen oblong, and 

 banded as in the female. 



Hab. Mexico, Oajaca. 



