i ATALOGUE OF NORTH AMERICAN DIPTERA. I 5 I 



ochrolabis LOEW, Cent., ix, 57. N. Y. Also White Mts., N. H. Slosson. 

 pauciseta FELT, in Lintner's I2th N. Y. Report, 224, pi. vi, f. 12. N. J. Larva 



bred from decaying potatoes. 



perpusilla WALKER, List, i, 106. [Martin Falls, Canada. 

 polita SAY, Long's Exped., App., 366 ; Compl. Works, i, 249. N. W. Terr. 



WIEDEMANN, Auss. Zw., i, 70. Also N. J. Smith Cat. 



prolifica FELT, in Lintner's I2th N. Y. Report, 226. Mass. In greenhouses, 

 punctata WALKER, List, i, 106. N. Amer. 

 robusta WALKER, List, i, 105. [Martin Falls, Canada, 

 rotundipennis MACQUART, Dipt. Exot., i, 2, 178. Carolina. 



BELLARUI, Saggio, i, 13, oc. in [Mexico. 

 sciophila LOEW, Cent., ix, 56. D. C. 



septemtrionalis RUBSAAMEN, Bibl. Zool., 1898, Lief. 4, 109, pi. vi, f. 12. Green- 

 land. 



LUNDBECK, Dipt. Groenl., n. 312, note. 

 striata RUBSAAMEN, Berl. Ent. Zeitsch., 1894, 37. Mex. 



tilicola OSTEN SACKEN, quoted by Comstock, Ag. Report, iSSi, with gall, and 

 this by Packard, 5th Report U. S. Ent. Comrn., 412. I do not find the 

 original desc., it may not have been previously described. 



tridentata RUBSAAMEN, Bibl. Zool., 1898, Lief. 4, 107, pi. vi, f. 13, 24. Greenland. 

 COQUILLETT, Proc. Wash. Acad. Sci., n, 392, oc. in Lowe Inlet, Br. Col. 

 LUNDBECK, Dipt. Groenl., i, 243, pi. v, f. 2 (validicornis). [Lundbeck.] 

 tritici COQUILLETT, Ins. Life, vn, 406, figs., life hist., etc. D. C. Larvae live at 



the roots of young wheat plants. 



unicolor SAY, Jour. Acad. Sci. Phil., vi, 153; Compl. Works, n, 351. Mex. 

 validicornis LUNDBECK, see tridentata. 

 vulgaris FITCH, 2d N. Y. Report, 487 (Molobrus^.N. Y. Also White Mts., 



Slosson. 

 zygoneura WILLISTON, Dipt. St. Vincent, 267, pi. vin, f. 23. St. Vincent, W. I. 



MANOTA. 



WILLISTON, Dipt. St. Vincent, 260, 1896. 



Note. The wing having a very incomplete venation, I cannot place the 

 genus in any of the established subfamilies. 

 defecta WILLISTON, loc. cit., pi. vin, f. 14. St. Vincent, W. I. 



HESPERODES. 



COQUILLETT, Ent. News, 1900, 429. 



Note. This genus is said to be "near Hcspcrinus," which Osten Sackcn, 

 after seeing the type, placed in the Bibionida?. 

 johnsoni COQUILLETT, loc. cit. Delaware Water Gap, N. J. 



CECIDOMYID^. 



There are peculiar difficulties in the task of properly representing this family 

 in the present Catalogue. On account of the fact that many species make galls 

 on plants, we encounter here a mixture of botanical and zoological science, which 

 has tended to separate the study of the Cecidomyidse from that of the other Dip- 

 tera. Only those who have made a special study of the family are at all informed 

 about it. L T nfortunately, not one of the present generation of American ento- 

 mologists has given this special attention. 



To make matters ten-fold worse, the European specialists in Cecidomyidte 



