2S6 Mr. T. D. A. Cockerell — Descriptions and 



only very obscure reddish beneath, tegulje bright ferruginous 

 with a black spot in front, end of abdomen pointed, but 

 forming an angle greater than a right angle. 



Dioxys pacificus, sp. n. 



? . — Length a little over 9 mm. 



Similar to D. productus subruber (Ckll.), but differing 

 thus : mesothorax less coarsely punctured ; postscutelhir 

 spine smaller; b. n. meeting t.-m. ; second s.m. more 

 narrowed above ; legs black, the knees obscurely reddish ; 

 abdomen much more finely punctured throughout, first three 

 segments terra-cotta red, hair-bands on hind margins of 

 segments thin and white ; apex of abdomen broadly rounded, 

 not truncate. 



Hab. Claremont, California (Pomona coll. 190). 



Xylocopa orpifex, Smith. 



Mts. near Claremont {Bake?- ; Pomona coll. 175). Lords- 

 burg, Calif., May 11 (H. H. Nininger). 



These specimens are rather large, but not to be separated. 

 The species extends eastward to Oak Creek Canon, Arizona 

 {Snow). 



Halictus smithii, Dalla Torre, variety a. 



y . — Length 5-5*5 mm. 



Black, with scanty, pale, slightly ochreous hair, caudal 

 fimbria concolorous ; head ordinary, broad ; clypens shining, 

 with very few scattered punctures ; mandibles red in middle; 

 supraclypeal area convex, shining, without evident sculpture; 

 front dull ; flagellum ferruginous beneath except at base ; 

 mesothorax dullish, extremely minutely punctured, the 

 median impressed line very distinct ; area of metathorax 

 semilunar, with very delicate, weak, straight, longitudinal 

 plicae ; posterior truncation not sharply defined above ; 

 tegulse rufo-testaceous. Wings greyish hyaline; stigma 

 large, dull ferruginous ; nervures fuscous or reddish fuscous ; 

 third s.m. very broad above. Legs black, with pale ochreous 

 hair. Abdomen shining black, without definite hair- bands, 

 but the sides of the segments are thinly beset with long 

 hairs, and the fifth has similar sparse hair all over. 



Microscopical characters : clypeus and supraclypeal area 

 very distinctly reticulate, with widely scattered deep punc- 

 tures ; scape well punctured ; middle of front rough and 



