Ilaliciine Bees of the Australian Region. 211 



tinged with ochreous dorsally \ legs black ; upper corners of 

 metathoracic truncation not at all prominent ; area semi- 

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

 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 white tomentum ; venter strongly 

 blackened ; wings almost clear, dusky at apex ; stigma 

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

 second s. m. a little higher than broad. 



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



From F. 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 . 



Speciesminute, about oi to 65 mm. lon^. 9. 



1. Postscutellum with a patch of bright 



orange tomentum ; third abdominal 

 segment with 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 wa-inkled 

 or striate : 5 , length 9| mm. (S. 



Australia.) j^eraustralis, sp. n.f 



Postscutellum without such a patch . . 2. 



2. Legs red, or largely so 3. 



Legs black, or almost 4. 



3. Larger ; legs dusky red ; bases of 



second and third abdominal segments 

 with a broad baud of orange tomen- 



* In all these the first r. n. meets the second t. c, except that it i.-j 

 just in the apex of second s. m. in H. conspicmis and H. reprcese?)ta/is. 



t H. 2)eraustralis is labelled in the Museum H. bkinyidatiis, vur., but 

 it appears to be a valid species. 



