40 



Eiiscopolia dakolnisis Towiisend, 1. c, pp. 123, 124. South Dakota. 

 Erihrissa amerivana liigot, Anu. Soc. Ent. France, j). 25t); 1888. Wasliiiigtoii. 

 Ginglytnia acriroxtrls Towuseml, Traus. Amer. Eut. See, Vol. XIX, pp. 118, 119; 



1892. Coustautiue, Mich. 

 Goniochata playioidea Townsend, 1. c, Vol. XVIII, pp. 351, 352; 1891. Las duces, 



N. Mex. 

 Hemithrixion astriforme lirauer and Bergenstamui, Zweil". Kais. Mas. Wien, V, i>. 357; 



1891. Colorado. 

 Hesperomyia erythrocera Brauer and Bergenstanim, 1. c, IV, p. Ill; 1889. Texas. 

 Himaniostoma sitgens Loew. Illinois. 

 Hyperirophocera parvipes Townsend, Trans. Amer. Eut. Soc, Vol. XVIII, pp. 360, 361; 



1891. Las Cruces, N. Mex. 

 lUigeria wlops Walker, belongs to Beskia; /. corythus Walker, is Xdnfhomelniia atri- 



pennis Say; and /. helymns Walker, belongs to Metacha'ta. 

 Loewia nigrifrons, ruficornin, and glohosa Townsend, appear to be synonyms of Myio- 



phasia a'nea Wied. 

 Loplwsia setigera Thomsf>n, belongs to Clausicella. 

 Myothyrta vanderwiilpia Townsinid, belongs to Hypostena. 

 Neotractocera anomaln Townsend, Trans. Am. Ent. Soc, V(d. XIX, pp. 105, 106; 1892. 



Las Cruces, N. Mex. 

 Paraliypochivta lieteroneura Brauer and Bergenstamui, Zwcif. Kais. Mus. Wieu, V, p. 



337; 1891. North America. 

 Peteina stylaia Brauer and Bergenstamui, I. c, pp. 386, 387. Greenland. 

 PItasia atrxpennis Say, belongs to Xanthomelana. 

 Podotadiina americana Brauer and Bergenstamui, is Tachina mella Walker, and P. 



ribrissata of the same authors is Euphorocera daripennls Macquart. 

 Bhinopliora valida and wextcaMa Townsend, Canadian Entomologist, Vol. XXIV, pp. 



167, 168; 1892. Las Cruces, N. Mex. 

 Sarcoclista dalotensis Townsend, Trans. Am. Ent. Sor., Vol. XIX, pp. 122, 123; 1892. 



South Dakota. 

 Stevenia pictipes Bigot, is Xanthomelana arcnata Say. 

 Tr'ua giUettU Townsend, belongs to I'araphyto. 



Tryphera americana and jjo/irfo/r/cs Townsend, are syiiouyms of Polidea areos Walker. 

 Xy8(a didyma Loew. Illinois. 



SYSTEMATIC ARRANGEMENT OF THE GENERA. 



A linear arraiigemeiit of the genera of the Tacliinid;e so as to indi- 

 cate their natural relationship is quite im])ossible, owing to the fact 

 that in several cases each of three genera is more closely related to a 

 fourth than to any other genus, and in a linear arrangement it is, of 

 course, impossible to place each next to the one to which it is nearest 

 related. The following arrangement shows the relationship of the 

 genera given in the preceding table perhaps as nearly as can be done 

 in a linear manner. By this arrangement, those without strong macro- 

 chrt'tcE on the abdomen are placed at the opposite end of the series to 

 those having tliese macrochiX't;e the most strongly developed : 



Apical cell ending at or close to the extreme wingtip. 

 Abdomen destitute of macrochictic. 

 Sides of the face bare. 



Proboscis sliorter or only slightly longer than the head. 



Hind tibiii' not ciliate: ('istogastcr, (h/mnosonia, Phoranilta, Jlophora. 

 Hind tibiiij outwardly ciliate : Trichopoda. 

 Proboscis longer than the head and thorax united : Eusiphona. 

 Sides of face with bristly hairs: Cyninophania. 



