184 OKTAL1DAE. 



Ccroxys. 



Macquart, Hint. Nat. Dipt. II, 437; 1835; Loew, Monogr. Ill, 125. 



*canus Loew, Monogr. Ill, 129; Tab. VIII, f. 22; Berl. Ent. Z. II, 

 374 (Ortalis). - Yukon River, Alaska; Nebraska (the same or a 

 very similar species occurs in Europe). 



* obsciiricornis Loew, Monogr. Ill, 126; Tab. VIII, f. 20. - - Nebraska. 

 * ochricornis Loew, Monogr. Ill, 126; Tab. VIII, f. 21. - - Northern 



Wisconsin River. 



*similis Loew, Monogr. Ill, 127; Tab. VIII, f. 23. - - Connecticut; 

 Quebec, Canada (ressembles very much the european C. crassi- 

 pennis). 



Anacampta. 



Loew, Zeitschr. f. d. Ges. Natunv. 1868, 7; Monogr. Ill, 129; 1873. 



* lathiscula Loew. Monogr. Ill, 130; Tab. VIII, f. 19 - California. 



* pyrrhocephala Loew, Zeitschr. f. Ges. Naturw. 1870, 335. -- Cali- 

 fornia. 



SECTION V. PTEROCALLIKA. 

 Pteroealla. 



Rondani, Esame di varie specie d'insetti ditteri Braziliani; Torino, 1848; 

 Loew, Monogr. Ill, 132. ( Zar >). 



strigula Loew, Monogr. Ill, 133; Tab. VIII, f. 30. -- Georgia (type 

 in the Berl. Museum). 



Siictoccplaala. 



Loew, Monogr. Ill, 134; 1873. 



*cril)cllum Loew, Monogr. Ill, 134; Tab. VIII, f 26 - Nebraska. 

 *crilmim Loew, Monogr. III. 135; Tab. VIII, f. 25 - Middle States. 

 *corticalis (Fitch) Loew, Monogr. Ill, f. 136; Tab. VIII, f. 28. - 



New York. 

 *vau Say, J. Acad. Phil. VI, 184, 4; Compl. Wr. II, 369 (Otialis); 



Loew, Monogr. Ill, 138; Tab. VIII, f. 29. -- Atlantic States. 



Callopistria. 



Loew, Monogr. Ill, 140; 1873. 



*annulipes Macquart, Dipt. Exot. 5 Suppl. 121 (Plrtti/stoma) ; Loew, 

 Monogr. Ill, 141; Tab. VIII, f. 27. -- Atlantic States. 



Myennis. 



R. Tesvoidy, Myod. 717, 1830; Loew, Monogr. Ill, 142. 



scutellaris AViedemann, Auss. Zw. II, 484 (Tryptta); Loew, Monogr. 

 I, 92 Tab. II, f. 20, 27 pryvda?); Monogr. Ill, 143. -- Mexico. 



