50 PROCEEDINGS OF THE ACADEMY OF [1898. 



NEW AND LITTLE-KNOWN BEES FROM WASHINGTON STATE. 

 BY T. D. A. COCKERELL. 



Halictus pacificus n. sp. 



9 . — Length 10 mm., black, with ochreous pubescence, inclining 

 to fulvous in very fresh examples, whitish in very faded ones; 

 second, third and fourth segments of abdomen with interrupted basal 

 bands, ochreous in color, of dense appressed hair, broad laterally, 

 tapering to a point mesad ; in very worn examples these bands are 

 practically obliterated. Head ordinary, cheeks unarmed, antennae 

 wholly dark, tegular reddish-piceous ; wings with more or less of a 

 yellowish tint, faintly dusky toward the apex ; subcostal nervure 

 black, other nervures, and stigma, honey color; enclosure of meta- 

 thorax semilunar, strongly radiately wrinkled, bounded by a tolerably 

 distinct rim; legs black, small joints of tarsi ferruginous; abdomen 

 with numerous very minute punctures, hair bands interrupted, apex 

 with pale fuscous hair. 



S . — Differs in the usual manner from the 9 . Apical portion of 

 clypeus yellow. Antennae long, flagellum, except the last two joints, 

 ferruginous beneath. Pubescence paler ; nervures darker ; anterior 

 tibia? in front, middle tibia? at apex, hind tibiae at both ends, and all 

 the tarsi, yellow. 



Hab. — Olympia, Wash., March 23 to July 9, numerous speci- 

 mens. (T. Kincaid). Also taken by Mr. Kincaid at Seattle, May 

 14th, on Rub us ursinus. 



The following table separates the females of various large Halicti 

 allied to pacificus : 



A. Enclosure of metathorax granular. 



a. Large, with a broad face lerouxii Lep. 



b. Smaller, with a narrower face coriaceus Sm. 



B. Enclosure of methathorax plicate. 



a. Wings clear, stigma piceous, tegulae testaceous, sisymbrii Ckll. 



b. Wings yellowish, stigma honey-color, rather larger species . 



pacificus Ckll. 

 The above four were all taken at Olympia. Three other species 

 are allied to coriaceus : 



