NOTES. 249 



Hubbard and Schwarz); fasciata from Dallas, Texas, ^Boll) and from 

 Manitou, Colo , where I took it Aug 18. 



220. Teirnccera. Some of the species placed in the genus Volu- 

 cella, may belong to Trtmiocrra. as I do not quite understand the de- 

 finition of this latter genus. Wiedemann (Auss. Z\v. I'reface to Volume II, 

 p. Xl was likewise doubtful about it. 



221. Eristalis albiceps Macq. is a distinct species and looks like 

 E. sem'culus Loew, from Cuba. I have seen the type in Paris. 



222. Eristalis compactus Walker has the whole leg red, while 

 E. atriceps as described by Loew, has black femora. Nevertheless M. 

 Walker's type, which I saw in London, struck irie as beii.g the same as 

 E. atriceps. The quet-tion is therefore, whether the color of the legs 

 is not variable, a question which I cannot solve here. (Heidelberg, 

 Oct. 1877.) 



223. Erutalis Androclus Walker, as I saw it in the Brit Mus. is a 

 Helophilus. Nevertheless I retain the name as E. Androclus 0. S. 

 (non Walker , as I have referred to it in the Western Diptera and 

 communicated it to many correspondents. 



224. Eristalis semimetallicus. I have been the type in Mr. Bigot's 

 collection ; it looked to me like E. Bastard i. It is possible however, 

 that it is 'a closely allied, but different, species. 



225. Eristalis cimidiatus. Macquart did not recognize E. dimidiatus 

 Wied., and thus came to describe it, first as nif/er in the Suites a Bitffon; 

 then the male as L'herminieri and alongside of it, both sexes as clwlybeus 

 (Dipt. Exot. Vol. II); and then again the female as iitcisuralis (in the 

 Supplem 4). That the eyes of the latter are described as glabrous, is 

 erroneous, as all the known North American Eribtalis have pubescent 

 eyes, with the single exception of E. aeneus. I saw the types of 

 E. L'herminieri and chalybeits in the Jardin des Plantes, and although 

 I had no opportunity of comparing them with specimens or descriptions 

 of E. dimidiatus, they did not shake the opinion I had previously for- 

 med of their synonymy. E. incisuralis I did not see. 



226. Eristalis flavipes, Syn. Milesia barda Say 2 (non $}, The 

 original type of Say's is still preserved in the Harris' collection in 

 Boston. This synonymy explains the bromi spot on the wings of the 

 female, mentioned in Say's description, and which does not exist in the 

 real female of M. barda. 



227. Syrphus oe:triformis Walker is a rather peculiar Eristalis, 

 represented by a single specimen in the Brit. Mas. 



228. Erl&talis tenox. I took this species for the first time in 

 Cambridge, Mass., in November 1875; also several specimens in New- 

 port, R I., in October and November 1876. Since then, I have seen it 

 from Georgia and Missouri (Collect, v. Roeder). It is strange that in 

 my 20 years of North American collecting is had never occurred to me 

 before. 



229. Eristalis philadelphicus. The type, a single female, is in Mr. 

 Bigot's collection; the yellow spots on the abdomen are somewhat 



