THE CANADIAN ENTOMOLOGIST. 133 



Eristalis foveifrons, Thomson. — Eugenies Resa, Dipt. 419, 78 



(1878); Williston, Trans. Am. Ent. Soc, xiii., 318(1886). 

 En'sta/is Amirochis, Osten Sacken.— Western Dipt. 337 (1877); non- 

 Walker, List, 612 (1849) ; ibid Cat. N. A. Dipt., note 223, p. 249 

 (1878); Williston, Synopsis N. A. Syrphidae, 165 (18S6). 

 Eristalis Brousi, Williston. — Proc. Am. Phil. Soc, xx., 319 {1882) ; 

 (Brousii), ibid Synopsis N. A. Syrphidae, 165 (18S6); Snow, 

 Kans. Uni. Quart. Vol. i., p. 38 (1892) ; ibid idem.. Vol. iii., p. 

 243 (1895); Townsend, Trans. Am. Ent. Soc, xxii., 48 (1895); 

 Hunter, Can. Ent., XXVlII.,p. 98 (1896). 

 This species was described by AViedmaiin in 1830 from specimens 

 from Montevideo in South America. Thirty-eight years later Thomson, 

 in his work on the Diptera of the Eugenies Resa, redescribed it under 

 the name of Eristalis foveifroNs, basing his description on specimens 

 from Buenos Ayres. 



For some time previous to 1877 Osten Sacken and Loew had been send- 

 ing out specimens of a species which they identified, however not certainly, 

 as the jS. Androcliis of Walker's List, iii., 612, to their correspondents under 

 that name. Osten Sacken has a note in his Western Diptera (1877) con- 

 cerning this species which he still at that time considered as Walker's 

 species, E. Androdus. Between this time and the time of the publication 

 of Osten Sacken's catalogue in 1878, he had examined the type of 

 Walker's species in the collection of the British Museum and found that 

 it was a ffelophilns. However, he retained the name E. A/idrocli/s, O. S., 

 (non-Walker) to avoid confusion. 



Now, strangely enough. Dr. Williston, in Proc. Am. Phil. Soc, xx., 

 319 (1882), recognized the male of this species as E. Meigenii, but at the 

 same time described the female as E. Brousii (sic). In the synopsis this 

 was corrected and the name Brousi given to replace Androdus. It was 

 only the immense difference in localities that prevented Dr. Williston's 

 identification of this species with E. Meigenii, as he states that the full 

 description applies almost perfectly. He is now of the opinion that they 

 are the same, and it is at his suggestion that the investigation which has 

 resulted in the above arrangement of the names was undertaken. 



22. Eristalis ocddentalis, Will. 



Five males and three females from Cook's Lilet, Alaska ; coll. Prof. 

 Dyche. Some of the males agree quite well with the description, except 

 that the basal joints of the middle tarsi are not yellowish, which was an 



