39 
145. With one or more pairs of frontal bristles below base of the second antennal 
joint If 7. 
Without any frontals below base of second antennal joint 146. 
116. Occiput at most only slightly convex, body short and robust, (p. 70) (Estrophaxia. 
Occiput strongly convex, body elongate and slender (p. 72) Eutrixa. 
147. Front of male destitute of orbital bristles, venter of abdomen of female destitute 
of short spines, third vein bearing at least two bristles near the base.. .. 148. 
Front in both sexes bearing orbital bristles, venter of female bearing many 
short black spines on the second segment, third vein usually with a single 
bristle near the base (p. 59) Celatoria. 
148. Antenna' not reaching below the lowest fourth of the face (p. 81) Biomyia. 
Antennas almost or quite reaching the oral margin (p. 60) Hypostena. 
149. Arista bare, or very short pubescent 150. 
Arista bearing hairs which are as long as its greatest diameter, antenna" reach- 
ing lowest fifth of the face (p. 66) Leslcia. 
150. Body short and robust 151. 
Body elongate and slender, antenna' not reaching below the lowest third of the 
face, apical cell closed and short petiolate (p. 72) Xauiliomelana. 
151. Tip of antenme not below lowest third of the face, frontal bristles usually not 
descending below base of the second antennal joint 152. 
Tip of antenna' at or below lowest fifth of face, frontals usually descending 
below base of the second antennal joint 153. 
152. Head over twice as high as long, occiput at most only slightly convex. 
(p. 70) (Kstropliasia. 
Head about one and one-third times as high as long, occiput usually strongly 
convex (p. 71) Glytiomyia. 
15:;. Third vein bearing only two or three bristles near the base, head unusually 
short (p. 70) (Ksirophasia. 
Third vein bristly almost to the small crossvein, head not unusually short. 
(p. 75) Siphona. 
UNRECOGNIZED GENERA. 
The folio wiug genera, which have been reported from America north 
of Mexico, together with the species referred to them, have not been 
recognized by the writer, or else the species belong to other genera: 
Baumhaueria analis van der Wulp, belongs to Clnetoga'dia. 
Besseria (Wahlbergia) brevipennis Loew. Nebraska. 
Chrysosoma n. sp. Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 407; 
1891. Georgia. 
Clista americana Townsend is a synonym of Myiophaaia cenea Wied. 
Clistomorpha hyalomoidea Townsend, Canadian Entomologist, Vol. XXIV, pp. 79 to 
81 ; 1892. New York. 
Cryptopalpus Jlaviceps Bigot, Rocky Mountains, and melanopygatus Bigot, Washing- 
ton, Bulletin Soc. Ent. France, p. 141; 1887. 
Daocha/a harveyi Townsend, Trans. Amer. Ent. Soc, Vol. XIX, pp. 97 and 98; 1892. 
Maine. 
EUozcta americana Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 388; 
1891. Georgia. 
Euceromyia robcrtsonii Townsend, Trans. Amer. Ent. Soc, Vol. XIX, pp. 115 to 116; 
1892. Southern Illinois. 
Eucnephalia gonoides Townsend, Canadian Entomologist, Vol. XXIV, pp. 166, 167; 
1892. New Mexico. 
Eumyothyria illinoicnsis Townsend, Trans. Amer. Ent. Soc., Vol. XIX, pp. 121, 122; 
1892. Carlinville, 111. 
