148 CATALOGUE OF NORTH AMERICAN DIPTERA. 



DIADOCIDIA. 



RUTHE, Isis, XI, I2IO, 1831. 



WINNERTZ, Mon., 665, 1863. 



SCHINER, Fauna Austr., n, 426, 1864. 



borealis COQUILLETT, Proc. Wash. Acad. Sci., n, 390. Lowe Inlet, Br. Col. 

 ferruginosa MEIGEN, Syst. Beschr., vi, 294 (Mycctobia). Europe. 



SCHINER, Fauna Austr., n, 426. 



COQUILLETT, Proc. Wash. Acad. Sci., n, 390, oc. in White Mts., N. H. 



EPIDAPUS. 



HALIDAV, Ins. Brit., Dipt., i, 7, 1851. 

 SCHINER, Fauna Austr., n, 416, 1864. 

 WINNEKTZ, Mon. Sciarinen, 182, 1867. 

 scabiei HOPKINS, Proc. Ent. Soc. Wash., HI, 149-159, full life hist., etc.; 20 figs. 



West Va. ; larva causes a form of scab in potatoes. 

 HOPKINS, Special Bull. W. Va. Exp. Station, No. 2, 97-106, figs., life hist, 



etc. Both papers issued in 1895. 

 HOWARD, Ins. Life, vn, 279, oc. in Missouri. 



EUGNORISTE. 



COQUILLETT, Proc. Ent. Soc. Wash., in, 321, 1896. 



MIK, Wien. Ent. Zeitung, 1896, 300, doubts relation to Gnoriste ; 1897, 39, 

 says is entirely different, and quotes Osten Sacken's opinion (in litt.) 

 that it is a Sciara. 

 occidentalis COQUILLETT, loc. cit. Las Cruces, N. M. 



Note. The species is common on golden-rod in fall at Moscow, Idaho; 

 I consider it a distinct genus of the Sciarinae, not closely related to Gnor- 

 iste. 



ZYGONEURA. 



MEIGEN, Syst. Beschr., vi, 304, 1830. 

 SCHINER, Fauna Austr., n, 416, 1864. 

 WINNERTZ, Mon. Sciarinen. 186, 1867. 



sciastica WILLISTON, Dipt. St. Vincent, 286, pi. vin, f. 24. St. Vincent, W. I. 

 toxoneura OSTEN SACKEN, Proc. Ent. Soc. Phil., 1862, 165 (Sciara). D. C. Gen. 

 ref. in Cat., 13. 



TRICHOSIA 



WINNERTZ, Mon. Sciarinen, 173, 1867. 

 hebes LOEW, Cent., ix, 58. N. Y. 



SCIARA. 



MEIGEN, Illig. Mag., n, 263, 1803; Syst. Beschr., i, 276, iSi&. 



LATREILLE, Hist. nat. Crust, et Ins., xiv, 288 (Molobnis), 1804. 



ZETTERSTEDT, Dipt. Scand., x, 3711, 1851. 



SCHINER, Fauna Austr., n, 417, 1864. 



WINNERTZ, Mon. Sciarinen, IT, 1867: a classic monograph of the European 



species of the subfamily. 



\YII.LISTON, Dipt. St. Vincent, 265, table of St. Vincent species. 

 LINTNER, loth N. Y. Kept., 387, 391, extended bibliographical notes. 



Note. For the occurrence in this country of the march of masses of 

 Ian-re, called " Heerwurm " in Germany, and " Snake-worm " in the United 

 States, see 



