72 HYMENOPTERA. 



111. IIaLICTIS PARALLELUS. B.M. 



Ilalictus narallelus, Say, Bost. Journ. i. 397- 6. 

 Iliilictus Lerouxii, St. Varg. Hym. ii. 37:J. 9. 



Closely rc'sonihk's //. ruhicundus ; differs from that species in 

 having the ahdonien less shining, cansed by its more closely and 

 distinctly ])uuctured abdomen, and by having fonr uninterrupted 

 white bands; the first covers the basal margin of the second seg- 

 ment, though less defined, as well as the apical margin of the 

 first. 



Hah. N. America; Trenton Falls; Hudson's Bay; Nova Scotia; 

 Arctic America, South of Lake Winnepeg. (Coll. Dr. Richard- 

 son.) 



112. IIalictus LiEvissiMus, n. s. B.M. 



Female. Length 2| lines. — Head and thorax green, finely 

 and closely punctured, the face thinly covered with a short hoary 

 pubescence, the same also covers the sides of the thorax and 

 the legs above ; the floccus at the base of the posterior femora 

 white ; the apical joints of the tarsi and also the tegular testa- 

 ceous ; wings hyaline, their nervm-es pale testaceous ; the enclosed 

 space beneath the post-scutellum is longitudinally rugose-striate. 

 Abdomen oblong-ovate, very smooth and shining, irapunctate, 

 the fourth segment covered with short white pubescence, the 

 fifth more densely so, the sides of the anal rima pale fulvous ; 

 beneath, the apical segments are fringed with long pale hairs. 

 Hab. Arctic America, South of Lake Winnepeg. (Coll. Dr. 



Richardson.) 



113. HaLICTUS SUBQUADRATUS, n. s. B.M. 



Male. Length '6\ lines. — Black, head subquadrate, the cly- 

 peus very slightly produced, its apical half pale yellow; the an- 

 tennae beneath testaceous, the two basal joints black ; the face 

 clothed with griseous pubescence, which also thinly clothes the 

 sides of the thorax, the metathorax, and the legs ; disk of the 

 thorax shining, finely punctured ; wings hyaline, their apical 

 margins slightly clouded, beautifully iridescent. Abdomen elon- 

 gate-ovate, a patch of white pubescence on the basal margins of 

 the second and third segments. 



This is probably the male of H. coriaceus. 

 Hab. Trenton Falls, North America. (Coll. E. Doubleday, Esq.) 



114. Halictus creberrimus, n. s. 



Female. Length 2 hues. — Head and thorax bronzed-green, 

 extremely closely and finely pimctured, the elypeus much pro- 



