HYMENOPTERA. 61 



well as on the sides and beneath with a thin hoary pubescence, 

 the enclosed space at the base of the metathorax longitudinally 

 rugose, surrounded by a shining ridge ; the tegulse, nervures, 

 tibiae and tarsi fulvous yellow ; the intermediate and posterior 

 tibiae have a dark stain in the middle, sometimes only the base 

 and apex yellow ; wings subhyaline. Abdomen elongate-ovate, 

 margins of the segments deeply constricted and having a fascia 

 of white pubescence. 

 Hab. Northern India. 



79. Halictus agrestis, n. s. 



Female. Length 3 lines. — Black, head above the insertion of 

 the antennae closely and finely punctured; the clypeus pro- 

 duced, shining, having a few deep punctures, on each side the 

 face is roughly sculptured; antennae beneath testaceous. The 

 disk of the thorax strongly punctured ; at the base of the meta- 

 thorax is a narrow arched space, which is longitudinally rugose, 

 reaching on each side nearly to the base of the hinder wings ; 

 the sides of the metathorax have a longituchnal ridge ; wings 

 hyahue, the nervures ferruginous, stigma palest. Abdomen very 

 finely punctured and very highly polished at the base, the fol- 

 lowing segments covered with a short griseous pubescence, more 

 or less obliterated on the second segment. 



Hab. Northern India. (Coll. J. S. Baly, Esq.) 



80. Halictus albescens, n. s. B.M. 



Female. Length 3 lines. — Black, the face covered with a 

 short hoary pubescence. Thorax, the disk shining, punctured, 

 the sides and beneath covered with hoary pubescence, most dense 

 on the sides of the metathorax, the enclosed space rugose ; the 

 post-scutellum covered with a hoary down, and a short stripe or 

 patch of the same at the base of the posterior wings, the latter 

 hyaline and beautifully prismatic, the nervures rufo-testaceous ; 

 legs covered with hoary pubescence, the apical joints of the 

 tarsi ferruginous. Abdomen ovate, an oblique stripe at the base 

 laterally, and a fascia at the basal margin of all the segments 

 white, the fascia on the second and third frequently obliterated 

 in the middle. 



The male very closely resembles the female, difi^ering only in 

 being as usual more elongate ; the antennae rufo-testaceous, not 

 so long as the head and thorax ; in both sexes the abdomen is 

 frequently more or less testaceous. 



Hab. Northern India. 



