394 S. W. Willistou — North American ConopidcB. 



Unrecogn Ized species. 



longicornis Say, Jour. Acad. Nat. Sci. Phil., iii, 83 ; Com pi, Wr., 

 ii, 72 ; Wiedemann, Auss. Z\v. Ins., ii, 245, 4 ; Williston, these 

 Trans., ante, p. 386 (reproduction of Say's and Wiedemann's 

 descriptions), — Mo. 



obliquefasciata Maccjuart, Dipt. Exot. ler Suppl., 141, 1 ; Willis- 

 ton, these Trans., ante, p. 385. — "Texas." 



bistria Walker, List, etc., iii, 679. — N. Am. (A doubtful species,) 



vicaria Walker, List, etc., iii, 679. — Nova Scotia. 



DALMANNIA. 



Dalmannia Robineau-Desvoidy, Essai sur les Myodaires, 248, 1830. 

 Stachynia Macquart, Dipt, du Nord, 1833. 

 Dalmania Rob.-Desvoidy, Myopaires, 1853. 



Second, third and fourth segments of the abdomen with broad yel- 

 low hind margins, each with three projections directed for- 

 ward, picta. 

 Segments of the abdomen with narrow hind margin, each of 

 which sends but a single median anterior projection, nigriceps. 



picta Williston, these Trans., vi, 94 (8). — Ariz, 

 nigriceps Loew, Centur., vi, 71; Williston, these Trans., vi, 94 (8). 

 —Conn., N. Y., D. C, Mont. 



STYLOG-ASTER. 



Stylogaster Macquart, Hist. Nat. des Dipt., ii, 38, 1835; Dipt, 



Exot.,ii, 3, 17, 1845. 

 Stylomyla Westwood, Proc. Zool. Soc. London, 1850, p. 270. 

 Ptychoproctas Bigot, Revue et Magaz. de Zool., No, 7, 1859, 



Second joint of antennas short, third elongate, neglecta. 



Second joint nearly as long as the third. biannulata. 



biannulata Say, Jour. Acad. Nat. Sci. Phil., iii, 81, 3 ; Compl, Wr., 



ii, 72 {Myojxt); Williston, these Trans., vi, 93. — Penn., Conn. 



Myopa styhtta Wiedemann, Auss. Zw. Ins,, ii, 243, 2 (ex parte). 



Stylomyla confusa Westwood, Proc. Zool, Soc. Lond., 1850, p. 



271. 



neglecta Williston, these Trans., vi, 91 (5). — Conn. 



Explanation of Plate XLI. 



Fig. 1. — Conops xanthopareus Will., female. 

 2. — Physocophala tibialis Say, male. 

 3. — Zodion fulvifrons Say, foinale. 

 4. — Zodioii pygiiiicum Will., male. 

 5. — Oncomyia modesta Will., female. 

 6. — Myopa clausa Loew, female. 

 7. — Dalmannia picta Will., female. 

 8. — Stylogaster neglecta Will., female. 



Errata. 

 Vol. vi, p. 94, line 22, for "first," read .second. Same page, foiirtli line from 

 bottom, for '^ Dabnonnia" read Dalmania. Page 95, line 7, for "triangular is" 

 read triangles are. 



