262 ' THE CANADIAN ENTOMOLOGIST. 



76. Xylota barbaia, Loew.— Port Renfrew, July 25, 1902, and 

 Glacier, Aug. 21, 1902, and by Harvey, at Vancouver, June 19, 1903. 

 Taken also at Seattle, Wash. 



77. Syritta pipiens (Linne'). — Abundant. Port Renfrew, Victoria, 

 Vancouver, Agassiz and Glacier, at dates ranging from July 17 to Aug. 19. 

 Harvey has taken it at Vancouver, June 19, 1903. Taken also at Laggan 

 and Banff, Alberta. 



78. Sphecomyia Pattoni, Williston. — A single male specimen taken 

 at Glacier, Aug. 21, 1902, I place here with some doubt. In general 

 appearance it is much like Pattofii, but it shows the following differences : 

 The ground colour of the face seems to be entirely dull black under 

 whitish pollen, and there is no shining facial stripe ; the spots of the 

 thorax white instead of yellow, and there is a fringe of yellow pile on the 

 scutellum ; the legs differ in the extent of yellow and black. It may be a 

 distinct species. The type locality of Pattoni is Washington. 



SOME NOTES ON APHIDID^. 



RY T. D. A. COCKERELL. 



MacrosipJmm ainbrosice (Thomas). — Sipho/iophora ainbrosicB, 

 Thomas, Bull. III. State Lab. Nat. Hist., 1S78, p. 4. 



Found at Pecos, New Mexico, on Lactiica. The following account 

 is based on the Pecos specimens : 



Very dark brown, very shiny ; legs, antennje and nectaries black, 

 except that the basal part of legs, to near middle of femora, is brownish- 

 white ; stigma pale green ; cauda of winged $ yellowish-white. 

 Measurements of winged $ in /x : Marginal cell about 900, of which 

 about 340 is substigmatal ; cubital vein between branches 850 to 970; 

 cauda 450 ; nectaries about 820, minutely imbricated ; beak about 950, 

 last joint about 160; antennal joints, (i) 130, (2) 80, (3) 900, (4) 750, 

 (5) 725) (6) 200, (6a) 1,130 ; 3 has numerous sensoria on the under side, 

 4 has no sensoria ; the hairs on 3 and basal half of 4 are knobbed, as 

 also are practically all those on the anterior legs. 



Young dull reddish, minutely tuberculate, not pruinose. 



This Pecos form may be separable as a variety ; in Schouteden's 



table of European species it runs to M. dehor it (Koch). It certainly is 

 not M. muralis or M. laduccE. 



Pemp/iii:^us Indfugus (Zehnt.). — Tctratieura /uci/uga, 7.t\\x\\.nQ\,Y)Q 

 Plantenluizen Van het Suikerriet op Java, XV. (1901). PI. 2, figs. 29-34. 



By the venation of the hind wings this cannot be a Tetraneura. 



