322 Annals Entomological Society of America [Vol. XIII, 



Dictya Meigen. 



Dictya Meigen, Illig. Mag. II, 277 (1803), not Fabricius, Syst. Antl. 325 (1805), 

 ' and not Dvctia Desvoidy. ' 



Monochatophora Hendel, Verb. z. b. Ges. Wien. L. 335 (1900); Cresson, 68. 



Meigen founded his genus Dictya on specimens of umbrarum 



Linn., but unfortunately credited the species to Fabricius instead 



of Linnaeus. As umbrarum Fabr. is a different insect, belonging 



to the ortalid genus Platystoma, Cresson would make Dictya 



a synonym of Platystoma, and revive for the species umbrarum 



Linnaeus Hendel 's genus MonochcBtophora, abandoned in the 



Catalog of Paleearctic Diptera. Such a course carries the 



technical letter of nomenclatorial law unnecessarily far, for it is 



as difficult to conceive how the sciomyzid genus Dictya can be 



converted into an ortalid as for the proverbial leopard to change 



its spots. 



Brownish, body and even femora witli abundant dark setigerous spots, face 

 yellowish, with central black dot, tip of front tibise and all femora with 

 blackish marks; wings dark, with numerous small rounded hyaline spots; 

 arista loosely plumose with black; front without shining stripes; 6 mm. 

 Eur., Mass.,* N. H., Ct.,* Queb., N. Y.,* Pa., N. J., Md., D. C.,* Va.. 

 N. Car., Fla., Ga., la., Ind.,* 111.,* Wise, Ga., La., Tex.,* Kans.,* Dak., 

 Neb., Man., Nev., Ariz., Col., Id.,* Wash.,* Or.,* Cal.,* Mex. {Tetanocera 

 piclipes Loew). {Tetanocera) umbrarum Linnsus 



Elgiva Meigen. 



EJgiva Meigen, Syst. Bes. VII, 366 (1838). 



Chione Desvoidy (not Megerle, 1811, Mollusca), Myodaires, 679 (1830). 

 Ilione Haliday, Westwood's Introd. Classif. Ins. 146 (1840). 



Reddish yellow, notum lightly cinereous, with two approximate median and 

 one lateral vittae; face and arista white; wings whitish, costa brownish, 

 submarginal cell hyaline, the crossveins and a longitudinal stripe behind 

 the third vein gray, fourth vein with one or two weak spots between the 

 crossveins. Eur.,* Me. (Boston Soc. Nat. Hist., Johnson, in litt.) 

 {Tetanocera lineata Fall., not Day, Dipt. Suec. Sciom. 11 (1820); Meigen. 

 Syst. Bes. VI. 43 (1830), VII. 366 (1838); Loew, Dipt. Beitr. I. 46 (1845); 

 Zetterstedt, Dipt. Sc. V. 2114 (1846); Walker, Ins. Brit. II, 167 (1853). 

 Ilione lineata Haliday, Westw. Introd. Classif. Ins. 146 (1840). Elgiva 

 lineata vSchiner, Faun. Austr. II, 63 (1864) ) lineata Fallen 



Hedroneura Her del. 



Hedroneura Hendel, Wien. ent. Ztg. XXI, 265 (1902). 



Ferruginous, face and cheeks pale yellow, silky, front wider than long, two 

 orbital spots; antennce reddish, second joint longer than third, the last 

 bluntly triangvilar, arista white with yellow base; hind femora irregularly 

 spinose beneath; wings yellowish in front, lightly brownish behind, with 

 blackish spots below end of second vein, on anterior crossvein and at front 

 end of posterior crossvein, irregular clouds also in apical cells; 7 mm. 

 Eur.; Ct., Ont., N. Y., 111., Wise, Col., Wyo.,* Mont.,* Id.,* Nev., 

 Wash.,* Or., B. C, (Cole). Miisca riifa Panzer, F. Germ. 54 (1798). 

 Tetanocera rufa Loew, Dipt. Beitr. 1, 42 (1845); Zetterstedt, Dipt. Sc. 

 V. 2141 (1846); Schiner, Faun. Austr. II, 63 (1864); Rondani, Prodr. Dipt. 

 Ital. VII, Sciom. 15 (1868). T. cucnlaria Fabricius, Sp. Ins. II, 449 (1781). 

 T. lineata Day, not Fallen. T. Sundewalli Fries, Monogr. Tanvpez. 

 Suec. 17 (1823) rufa Panzer 



