December, tgoi] 



PSYCHE. 



285 



quadrangle about square ; ch peus rathei' 

 strongly' produced; antennae black, the fia- 

 gellum faintly brownish beneath towards 

 apex; mesothorax shining, densely and 

 strongly punctured ; basal area of metatho- 

 rax coarsely wrinkled ; tegulae very pale 

 brown ; wings smoky, nervures very dark 

 brown, stigma lighter brown ; hind spur of 

 hind tibia pectinate. 



Allied to H.fasciatus (as understood 

 by Robertson), but larger, with the an- 

 terior knees and tibiae wholly black, the 

 wings and their nervures much darker, 

 the third submarginal cell much broader 

 above (being narrowed less than half to 

 marginal), the abdomen quite without 

 an aeneous lustre, and with the bands 

 snow-white. In both species the first 

 flagellar joint is very short, hardly long- 

 er than the second. H. virgatelliis is 

 distinguished from H. trhonatus by its 

 dark nervures and dense punctures. 



Halictus honimclas, n. sp. — 



? . Length about 7 mm. ; head and thorax 

 very dark olive green, legs and abdomen 

 black, the latter with a purple tint about the 

 middle of the second and third segments. 

 Head somewhat elongated, facial quadrangle 

 longer than broad ; clypeus produced, black, 

 with large sparse punctures ; front dull, with 

 excessively close punctures ; antennae black, 

 flagellum slightly brownish towards end ; 

 scape curved, long, almost reaching anterior 

 ocellus; flagellum short; mesothorax mi- 

 nutely tessellate, with distinct punctures, not 

 very dense in the middle; base of metatho- 

 rax rugulose, not bordered by a sharp edge ; 

 tegulae shining piceous; wings smoky, nerv- 

 ures and stigma very dark brown ; third 

 submarginal cell short and high, narrowed 

 lessth.in half to marginal; legs with silvery- 

 wliite hair; hind spur of hind tibia pectinate 



with only two well-formed teetli ; abdomen 

 shining, with extremely minute punctures, 

 apical portions of the segments minutely 

 transversely lineolate ; elongate subtriangu- 

 lar white hair-patches at lateral bases of seg- 

 ments 2 to 4, much in the manner of H. pec- 

 toraloides; a good many white hairs on 

 abdomen beneath and at apex ; fimbria pale 

 brownish. 



One 9 , June 29. 



Ha/ictus dasiphorae, n. sp. — 



?. Length about 7 mm., general appear- 

 ance of the last species, but wholly black, 

 and the abdominal hair-patches ai'e less pro- 

 noimced, being more merged in the general 

 pale pruinosity, especially after the second 

 segment. The orbital margins on the inner 

 side are not far from straight, whereas in H. 

 /icmimelas they are quite strongly concave. 

 The form and sculpture of the head, the form 

 of the antennae, and the sculpture of the 

 mesothorax and metathorax, are about the 

 same in the two species, but in dasiphorae 

 the enclosure of the metathorax is longer, 

 and the flagellum is fulvous beneath except 

 at the apex. The wings of dasipkoi-ac are 

 dusky as in /leim'mclas, but the nervures and 

 stigma are rather pale brown ; the venation 

 is about the same in the two species. 



5 females. June 27. 



H. dasiphorae cannot be the 9 of If. 

 pc-ialtiis, on account of its dusky wings 

 with lighter nervures. It differs at once 

 from pecforalis by the granulose (not 

 ridged) base of metathorax, and more 

 produced clypeus ; from gracilis by the 

 granulose (not cancellate) base of met- 

 athorax and dusky wings ; from sub- 

 obsciirKs by its larger size, dusky wings, 

 second submarginal cell little narrowed 

 above, etc.; from sitniiis by its smaller 

 size, third submarginal cell lonifer than 



