284 THE CANADIAN ENTOMOLOGIST. 



in the female ; median pair of spots on segment i smaller, apical dorsal 

 segment narrow, rounded at tip. 



Length slightly more than 4 mm. West Point, Nebr., Aug. 30, 1903; 

 on Solidago. 



Distinguished from heliopsis by being smaller, not so closely 

 punctured, large spot of pubescence on pleura, reddish tinge of head and 

 thorax above, spots on abdomen white, not tinged with yellowish, lighter 

 coloured legs, etc. 



Halictus prtdjiosiformis, n. sp. — $. Entirely bright green, pubes- 

 cence rather abundant, white ; facial quadrangle about square ; face 

 closely, rather coarsely punctured ; antennse dark ; mesothorax finely 

 lineolate, coarsely, rather closely punctured; metathorax with coarse, very 

 irregular strise not quite reaching apex, the apical part rather coarsely 

 roughened; truncation not surrounded by a salient rim; wings hyaline, 

 stigma honey colour, subcosta dark, nervures very light, those surround- 

 ing the marginal cell darker ; tegulse dark brown ; legs dark, pubescence 

 white ; hind inner spur light-coloured, with about four long teeth ; 

 abdomen finely closely punctured, first segment more sparsely so, apical 

 margins of segments testaceous ; abdomen, except discs of segments i 

 and 2, covered with white sub-appressed pubescence ; very often this 

 pubescence is worn almost entirely off. 



Length about 6 mm. 



^ . — Similar to 9 '> facial quadrangle slightly longer than broad, only 

 slightly narrowed below ; antennse reddish testaceous beneath ; clypeus 

 anteriorly dark ; nervures as in the female, but the darkened ones darker 

 and more contrasting : metathorax roughened at base, and with a median 

 longitudinal line not reaching apex ; on each side of this there is a 

 depression, so that it appears as if the line divided at rear and ran laterally 

 and then to front, leaving a narrow smooth shiny border ; abdomen, 

 including the first segment, more distinctly and coarsely punctured than 

 in the female, and only sparsely pubescent. 



Length about 6 mm. Types : Fedor, Texas, March 8, 1902 ( ?); 

 May 17, 1904 ( c^ ). (Birkmann coll.) 



Paratypes : Fedor, Texas ; Boulder, Colo. (W. P. Cockerell.) 



This species is the colour of pruinosus, but the wider facial quad- 

 rangle and coarse ])unctures of the mesothorax separate it in the 

 female ; the male has a much wider face than pruinosiis, and has the 

 metathorax much less rugose. 



