1Q PROCEEDINGS OF THE NATIONAL MUSEUM vol. tf?J 



closely and distinctly punctured, median depressed line of meso- 

 thorax and scutellum distinct; entire mesopleura shining; tegulae 

 black, reddish outwardly, but the whole effect extremely dark; 

 wings strongly grayish, stigma dark brown, nervures lighter, outer 

 nervures weakened; basal nervure near to nervulus; second cubital 

 cell very broad below, narrowed above, receiving recurrent nervure 

 near its end; third cubital not very greatly broader than second; 

 legs black, including small joints of tarsi, hind basitarsi with pale 

 red apical tuft; hind spur with at least six small spines; area of 

 metathorax large, plicate basally, not polished; posterior truncation 

 shining; abdomen very broad, hind margins of segments hardly per- 

 ceptibly brownish; surface shining, no distinct hair-bands or spots, 

 hind margins of segments 2 to 4 laterally with thin long pale hair. 



Okeanskaja, Siberia, type locality, August 18, 5 females 

 (Cockerell). 



Paratype.—C&t. No. 27348, U.S.N.M. 



The tegulae vary to rufous. One specimen was taken at the Kudia 

 River, July (W. P. Cockerell). 



Group B. Hind spur ok female hind tibia with three large, stout, widely spacho 



spines or teeth 



HALICTUS PERPLEXANS. new species 



Female. — Length about 5.5 mm., anterior wing about 4 mm. ; black, 

 with thin grayish- white hair, abundant at sides of prothorax; head 

 approximately circular seen from in front; clypeus shining, with 

 very distinct punctures; front extremely densely punctured, but 

 somewhat glistening; flagellum dull ferruginous beneath except 

 basally; mesothorax and scutellum dullish, very closely punctured, 

 the scutellum without any impressed line; sides of thorax dull; area 

 of metathorax shining, with fine plicae not reaching apex ; posterior 

 truncation shining, sharply bounded about halfway up at sides; 

 tegulae dark rufous, piceous at base; legs black, with grayish-white 

 hair, tarsi reddish at apex ; wings dusky, distinctly brownish, stigma 

 and nervures dusky reddish ; basal nervure close to nervulus ; second 

 cubital cell rather narrow ; first recurrent nervure meeting second in- 

 tercubitus; abdomen broad, highly polished; apices of segments lat- 

 erally with very conspicuous white hair, and end of abdomen con- 

 spicuously hairy. 



Preobrageniya Bay, Siberia, type locality, July 12, 4 females 

 (Cockerell); Low Lighthouse, July 13, 1 female (Cockerell). 



Paratype.—C&t. No. 27351, U.S.N.M. 



