AO 
Euscopolia dakotensis Townsend, |. ¢., pp. 125, 124. South Dakota. 
Evibrissa americana Bigot, Ann. Soc. Ent. France, p. 256; 1888. Washington. 
Ginglymia acrirostris Townsend, ‘Trans. Amer. Ent. Soc., Vol. XIX, pp. 118, 119; 
1892. Constantine, Mich. 
Goniocheta plagioides Townsend, |. c., Vol. XVIII, pp. 351, 352; 1891. Las Cruces, 
N. Mex. 
Hemithrixion wstriforme Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 357; 
1891. Colorado. 
Hesperomyia erythrocera Brauer and Bergenstamm, 1. c., IV, p. 114; 1889. Texas. 
Himantostoma sugens Loew. Illinois. 
Hypertrophocera parvipes Townsend, Trans. Amer. Ent. Soc., Vol. X VIII, pp. 360, 361; 
1891. Las Cruces, N. Mex. 
Tiligeria wlops Walker, belongs to Beskia; J. eorythus Walker, is Nanthomelana atri- 
pennis Say; and J. helymus Walker, belongs to Metachta. 
Loewia nigrifrons, ruficornis, and globosa Townsend, appear to be synonyms of -Myio- 
phasia wnea Wied. 
Lophosia setigera Thomson, belongs to Clausicella. 
Myothyria vanderwulpia Townsend, belongs to Hypostena. 
Neotractocera anomala Townsend, Trans. Am. Ent. Soc., Vol. XIX, pp. 105, 106; 1892. 
Las Cruces, N. Mex. 
Parahypocheta heteroneura Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 
337; 1891. North America. 
Peteina stylata Brauer and Bergenstamm, 1. ¢., pp. 386, 387. Greenland. 
Phasia atripennis Say, belongs to Xanthomelana. 
Podotachina americana Brauer and Bergenstamm, is Tachina mella Walker, and P. 
vibrissata of the same authors is Huphorocera claripennis Macquart. 
Rhinophora valida and mexicana Townsend, Canadian Entomologist, Vol. XXIV, pp. 
167, 168; 1892. Las Cruces, N. Mex. 
Sarcoclista dakotensis Townsend, Trans. Am. Ent. Soc., Vol. XIX, pp. 122, 123; 1892. 
South Dakota. 
Stevenia pictipes Bigot, is Xanthomelana arcuata Say. 
Trixa gillettii Townsend, belongs to Paraphyto. 
Tryphera americana and polidoides Townsend, are synonyms of Polidea areos Walker. 
Xysta didyma Loew. Illinois. 
SYSTEMATIC ARRANGEMENT OF THE GENERA. 
A linear arrangement of the genera of the Tachinidie so as to indi- 
cate their natural relationship is quite impossible, 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- 
chiete on the abdomen are placed at the opposite end of the series to 
those having these macrochetze the most strongly developed: 
Apical cell ending at or close to the extreme wingtip. 
Abdomen destitute of macrochete. 
Sides of the face bare. 
Proboscis shorter or only slightly longer than the head. 
Hind tibiwe not ciliate: Cistogaster, Gymnosoma, Phorantha, Alophora. 
Hind tibiwe outwardly ciliate: Trichopoda. 
Proboscis longer than the head and thorax united: Husiphona. 
Sides of face with bristly hairs: Gymnophania. 
