NO. 1818. BEES IN THE NATIONAL MUSEUM. 2—COCKERELL. 251 



Habitat. — Kashgar, Chinese Turkestan, August 26, 1893 (W. L. 

 Abbott). 



This is a species of ProantMdium, related to P. oblongatum, from 

 which it differs by the fulvous scopa and the greater amount of 

 yellow on the thorax, as well as other details. Proantliidium Friese 

 must not be confused with Protanthidium T. and W. Cockerell, which 

 is a quite different genus. 



Type.— Cat. No. 13535, U.S.N.M. 



LITHURGUS APICALIS OPUNTLffi Cockerel). 



One female; Del Rio, Texas, May 8, 1907 (F. C. Bishopp). 



MEGACHILE PAMIRENSIS, new species. 



Male. — Length 13 mm.; black, the tarsi ferruginous, the anterior 

 and middle basitarsi variably dusky at base; head ordinary; eyes 

 obscure reddish; mandibles dark, with two apical teeth, the outer 

 one long; vertex and front dull and roughened; face and lower and 

 hind part of cheeks densely covered with long white hair; anterior 

 part of cheeks, and vertex, with fuscous hair, but occiput with long 

 pale hair; antennae black, third joint longer than second, but shorter 

 than fourth; mesothorax and scutellum densely punctured; thorax 

 above with dull white hair slightly tinged with ochreous, or strongly 

 suffused with reddish-fuscous, especially on scutellum; hair of pleura 

 and metathorax also variable in the same manner; tegulas shining 

 black, slightly reddish posteriorly; wings moderately dusky, not 

 dark; a brownish cloud in marginal cell; legs with long hair, varying 

 from white to brown like that of the thorax, but the middle and 

 hind tarsi and anterior tarsi in large part, with clear ferruginous hair, 

 matching their tegumentary color; anterior coxae densely covered 

 with long hair, unarmed; anterior tarsi rather thick, but not other- 

 wise modified; tibial spurs ferruginous; abdomen with black hair 

 on basal part of first segment, but otherwise the hair on first three 

 segments is warm ochreous; on the other segments it is black, 

 except that on the fourth it is largely ochreous or practically all 

 black; sixth segment depressed, the broadly rounded distal margin 

 bearing a series of eight to ten prominent subequal teeth; seventh 

 segment with a broadly rounded median lobe; no distinct hair- 

 bands, but the pale hair on the first three segments is so arranged 

 as to produce a somewhat banded effect; fourth ventral segment not 

 emarginate. 



Habitat— Tagdumbash, Pamir, 13,000 feet, June 14, 1894 (W. L. 

 Abbott). Two males. 



A very distinct species, related to the M. ericetorum group. The 

 appearance of the abdomen (but not the apical structure) is much 

 like that of M. circumcincta. The mandibles and antennae are formed 

 essentially as in ericetorum, and the sixth abdominal segment is 



