278 Mr. T. 1). A. ( ockcrell — Descn'^itioits and 



Allied to M. heuiviiu'iisis, but easily separated by the 

 wholly l)laek abdomen. It cannot be the male of M. ordi- 

 nariii, Sni., as that has hyaline wings witli I'eiTuginous 

 ueivurcs. 



Megachile })ii(jnata ])Omon(P, sp. n. 



$ . — Length 15 mm. 



Like M. pu(jiHttii, Say, but the pale hair of thorax, lo^rs, 

 and alxlonieu reddish yrllow, the doisal surface of sixth 

 al)domiiial segment densely covered with clear ochreous 

 hair, without any dark hairs iutermixed. Median apical 

 lobe of clypeus entire. 



Hub. Mts. near Claremont, Calif. (Balcer ; Pomona coll., 



ib;^). 



Andrena macrocephala, sp. n. 



(^ . — Length about 9 mm. 



Black, with an exticmcly large and broad quadrate head, 

 nnich broader than the small thorax ; eyes diverging below ; 

 ely[)eus very broad and low, sparsely punctured, pale yellow 

 villi two pale gnyish-browu spots ; process of labrum 

 emarginate ; mandibles very long, hent in middle, red at 

 tip; cheeks very hroad, but rounded behind; flagellura 

 ver}' obscurely reddish beneath ; occiput and middle of face 

 with red hair, sides of face with black hair; thorax dull, 

 minutely granular, with long fox-red hair; legs slender, 

 reddish black ; tcgulae very small, dark brownish. Wings 

 modei'ately dusky, stigma dull ferruginous, nervures fuscous. 

 Abdomen shining black, without bands, hair at apex soot- 

 colour. 



Var. a. Head not so large, though still very large and 

 broad ; thorax with pale fulvous hair. 



Hub. Claremont, Calif. {Baker ; Pomona coll., 200 ; 

 var. a., 199). 



A remarkable species, suggestive of A. berberidis, Ckll., 

 both having a broad head, yellow clypeus, and well- 

 developed malar space. The clypeus is much broader and 

 lower than that of berberidis, and there are many other 

 differences. 



Payiurginus neomexicanuSj (^kll. 



P. nigrinus, Viereck, is the female of P. neome.ricanus. 

 I have numerous females from J^eulah, August (one at 

 flowers of Polemonium ; JV. Porttr), Kio Kuiduso, prox. 



