190 AMERICAN HYMENOPTERA. 



scape with long hair; clypeus with large punctures: front and vertex shining, 

 with strong well-separated punctures; lahruni flat and shining; mandibles fer- 

 ruginous at tips; tongue narrow and extended, but neither the maxillse nor the 

 palpi very long, the palpi especially are not nearly as long as in H. marginatus : 

 mesothoras pubescent, but the surface visible, shining, with strong well-separated 

 punctures; base of nietathorax semilunar, with a distinct margin, shining, with 

 many distinct and even raised longitudinal lines; tegulse dark brown; wings 

 dusky hyaline; nervures and stigma brown; venation as in marginatus, with a 

 fairly large stigma and wavy cubital nervure; legs black, witli pubescence, which 

 shines silvery in certain lights; abdomen fairly broad, punctured, the punctures 

 much closest at the bases of the segments; no hair-bands, but the first four seg- 

 ments with very broad and conspicuous testaceous hind-margins; apex with a 

 triangular patch of velvet of the brightest apricot color. Venter flat, little hairy. 

 % . About the same length, abdomen narrower. Pubescence all white ; cly- 

 peus with a dense white beard ; antennse short for a % ; middle of front with an 

 impunctate area, surrounded by very sparse punctures; testaceous margins of 

 abdominal segments not so broad ; no apical color at the apex ; first ventral seg- 

 ment submarginate; penultimate ventral segment with a ferruginous process, 

 shaped something like the tail of a fish, and to each side of it a piceous process. 



Hab. — Southern California, 1 9 > ^ ^ » sent by Mr. Fox. Differs 

 at once from H. marginatus by the smaller size, base of nietathorax, 

 color of apex of abdomen, etc. Named after Mr. E. Saunders, who 

 has given excellent descriptions and figures of the structural char- 

 acters of many genera of bees. 



(15.) HalictoideK iiiulleri n. sp. 9- — Length 7i mm., black, the front 

 and vertex having a sti'ong blue tinge; pubescence scanty, except on hind 

 legs and parts of the abdomen, white, more or less tinged v^ith ochreous; 

 some inconspicuous black or fuscous hairs on scape and vertex; occiput with 

 quite a conspicuous white fringe; sides of face with white hair; head some- 

 what broader than round, viewed from in front ; front and vertex strongly and 

 very closely punctured ; clypeus with large punctures, absent just before the 

 anterior margin ; mandibles short and stout ; tongue long and narrow ; palpi not 

 very long; antennse very short, truncate at tip; flagellum dull ferruginous 

 beneath; mesothoras bare, shining, with very close, strong punctures; area 

 round tegulse pubescent; nietathorax with the enclosure not well defined, pre- 

 senting rather obscui'e longitudinal raised lines at the base; tegulpe dark brown ; 

 wings smoky hyaline; nervures and stigma dark brown ; venation like that of 

 marginatus. except that the first recurrent nervure enters the second submarginal 

 cell very near its base ; legs black ; pubescence on hind tibiae and tarsi dense ; abdo- 

 men closely punctured at the bases of the segments; hind margins of the first 

 thi'ee segments brownish, of the fourth whitish ; bases of second to fourth seg- 

 ments banded with appressed white puliescence; third segment with a subapical 

 white hair-band, thin or interrupted in the middle: fourth with an apical band ; 

 apex fulvous, surrounded by dark fuscous hairs; fourth ventral segment with a 

 transverse median depression. 



Hah. — Southern California, sent by Mr. Fox. Differs from 

 iiia.r</ui(iti(.s by the bluish tint of head, banded abdomen, smoky 



