S. W. WlUiston — North Anterlcau Gotiopldm. 893 



2, — Large species (8-9'""'). 3. 

 Smaller species ; femora, or at least tibi;e, in large part black- 

 ish. 4. 

 3. — Femora and tibiae wholly reddish yellow. modesta. 

 Femora, at least on outer part, black ; eastern. 



Var. melanopoda. 



4. — Species 5-7""" long. abbreviata. 



Very small species (4-5"""^). loraria, 



Baroni Williston, these Trans., vi, 97 (11).— Cal., Col. 

 abbreviata Loew, Centur., vii, 73 ; Williston, these Trans., vi, 97 



(11).— New Eng., ? Cal. 

 modesta Williston, these Trans., vi, 96 (10). — Cal. 



Var. melanopodd Williston, supra et vi, 96. — White Mountains. 

 loraria Loew, Centur., vii, 74 ; Williston, these Trans., vi, 98 (1 2) ; 



(translation of the original). — New Eng. 



MYOPA. 



Myopa Fabriciias, Syst. Entom., 798, 1775. 



Phorosia Robineau-Desvoidy, Fam. d. Myopaires, 1853. 



Myopella Rob.-Desvoidy, 1. c. 



Pwr^jMre^ZaRob.-Desvoidy, 1. c. 



Hiiustella Rob.-Desvoidy, 1. c. 



Myopina Rob.-Desvoidy, 1. c. 



Fairmairia Rob.-Desvoidy, 1. c. 



Lonchopalpvs Rob.-Desvoidy, 1. c. 



Pictina Rob.-Desvoidy, I.e. 



Gonirhynchus Rondani, Dipt. Ital. Prod., i, 58, 1856. 



Arpagita Lioy, Acta. Venet., 3 Ser., ix, 1327, 1864. 



Ischiodonta Lioy, 1. c. 



1. — Cheeks below very distinctly fringed with pile ; wings with 



spots. 2. 



Cheeks not fringed with pile below. 3. 



2. — Face with black spots. pictipennis. 



Face without black spots, pile of abdomen long. pilosa. 



3. — Abdomen chiefly black. 4. 



Abdomen red. clausa. 



4. — Pile of abdomen light yellow. vesiculosa. 



Pile of abdomen black. plebeia. 



pictipennis Williston, these Tr^ns., ante, p. 382. — Ariz. 



pilosa Williston, these Trans., ante, p. 383. — Cal. 



vesiculosa Say, Jour. Acad. Nat. Sci. Phil., iii, 80, 1 ; Compl, Wr., 

 ii, 72; Wiedemann, Auss. Zw. Ins., ii, 245, 3; Williston, 

 these Trans., ante, p. 384, — Penn., N. H., Mass., Ga. 

 ? 3Iyopa apicalis Walker, List, etc., iii, 679. 



plebeia Williston, these Trans., ante, p. 384, — Ariz, 



conjuncta Thomson, Eugen. Resa, Dipt., 515. — Cal. 



clausa Loew, Centur., vii, 72. — New Eng., Montana. 



