J/alicline Bees of the Austra/ian Rejjlon. 211 



tinged witli oclircoas dorsally ; legs black ; upper corners of 

 nietathoracic truncation not at all prominent ; area semi- 

 lunar, with a shining rim, its surface with nearly straight 

 longitudinal ridges, evanescent posteriorly, but extending 

 over more than half the surface ; abdomen broad, very dark 

 chestnut-red, beyond second segment strongly blackened, but 

 not black ; sides of second and third segments each with a 

 triangular basal patch of zvhite tomentuni ; venter strongly 

 blackened ; wings almost clear, dusky at apex j stigma 

 sepia, nervures dark brown ; first r. n. meeting second t. c. ; 

 second s. ra. a little higher than broad. 



Hab. Melbourne, Australia, June 26, 1892 {French). 



From P. Frenchi (1) P. hiltacus differs by its lighter 

 abdomen, without the lateral hair- patches, &c. ; (2) P. ti- 

 lachus differs by being larger, with the area shorter and the 

 lateral hair-patches of abJomen wanting, &c. 



Halictus. 



The following table is based on the specimens in the 

 British Museum : — 



Species large or middle-sized, not 



minute * 1 . 



Species minute, about o| to 65 mm. lonc^. 9. 



1. Postdcutelluni with a patch of bright 



orange tomentum ; third abdominal 

 segment witli a well-defined large 

 basal patch of bright orange tomen- 

 tum, ending abruptly on each side in 

 the subdorsal region ; legs mainly red ; 

 sides of upper border of prothorax 

 covered with bright orange tomen- 

 tum ; marginal cell and beyond and 

 vicinity of basal nervure suffused with 

 fuliginous; area dull, not wrinkled 

 or striate: $, length 9.} mm. (S. 



Australia.) peraustrdllK, sp. u.f 



Postscutellum without such a patch . . 2. 



2. Legs red, or largely so '.'>. 



I^egs black, or almost 4. 



3. Larger ; legs dusky red ; bases of 



second and third abdominal segments 

 with a broad baud of orany:e tomen- 



* In all these the first r. n. meets the second t. c, except that il i.s 

 just in the ape.x of second s. m. in II. compicmts and //. repr<esentans. 



t //. peraustrulis is labelled in the Museum //. biviinjulalnx, vnr., but 

 it appt'ars to be a valid species. 



