39 



145. With one or more pair.s of Irontal bristles helow base of the sceoud auteuual 

 joint l-iT. 



Without any froutals below base of secoud auteuual joint 146. 



116. (^eeiput at moat only slightly eouvex, body short and robust, (p. 70) (Estrophania. 



Occiput strongly convex, body elongate and slender (p. 72) Jiutrixa. 



147. Front of male destitute of orbital bristles, venter of abdomen of female destitute 



of short spines, third \ein bearing at least two bristles near the base.. .. 148. 



Kront 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) CcJaloria. 



148. Antenna' not reaching below the lowest fourth of the face (p. 81) Biomi/ia. 



Autenn;i' almost or quite reaching the oral margin (p. 60) Hyposiena. 



149. Arista bare, or very short pubescent 150. 



Arista bearing hairs which are as long as its greatest diameter, antenute reach- 

 ing lowest fifth of the face (p. 66) LisMa. 



150. liody short and robust 151. 



Body elongate and slender, antenna- not reaching below the lowest third of the 



ftice, apical cell closed and short petiolato (p. 72) XaiithomehDia. 



151. Tip of antenna> not below lowest third of the face, frontal bristles usually not 



descending below base of the second auteuual joint 152. 



Tip of antenna! at or below lowest fifth of face, frontals usually descending 



below base of the second antennal joint 153. 



1.52. Head over twice as high as long, occiput at most only slightly convex. 



(p. 70) (Kstrophasia. 

 Head about one and one-third times as high as long, occiput usually strongly 



convex ^i .4 A i\i9??A<'. (P- 71) Chjtiomyia. 



15o. Third vein bearing only two or three bristles near the base, head unusually 



short (p. 70) (Estrophasia. 



Third vein bristly almost to the small crossvein, head not unusually short. 



(p. 75) Siphona. 



UNRECOCNIZEI) GENERA. p •, o — , A^ ^ 



The following genera, wlii(;li hav^e 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: 



Baumhauiria analis \'an der AV'ulp, belongs to CJha^toga'dia. 



Bes-seria {Wahlhcrgia) hrcvipennis Loew. Nebraska. 



Chrysosoma n. sp. Brauer and Bergenstamm, Zwcaf. Kais. Mus. Wieu, V, p. 407; 

 1891. Georgia. 



Clista americana Townsend is a synonym of Myiophasia wnea Wied. 



Clisfomorpha hyalomoi(le>< Townsend, Canadian Entomologist, \o\. XXIV, pp. 79 to 

 81 ; 1892. New York. 



Cryptopalpus flavicepn Bigot, Rocky Mountains, and unUtnopyfuitiis Bigot, Washing- 

 ton, Bulletin 8oc. Ent, France, p. 141; 1887. 



Daocluvta harreyi Townsend, Trans. Anu-r. Knt. Soe., Vol. XIX, pp. 97 and 98; 1892. 

 Maine. 



Eliozcta americana I'rauer and Bergenstaunu, Zweif. Kais. Mus. Wien, V, p. 888; 



1891. Georgia. 



Eiiceromyia rohcrlsonii Townsend, Trans. Amer. Ent. Soc;., Vol. XIX, ])p. 115 to 116; 



1892. Southern Illinois. 



Encnephalia (jonohles Townsend, Canadian l^ntoniologist, Vol. XXIV, pp. 166, 167; 



1892. New Mexico. 

 Eiimyothyria illinoicnsis Townsend, 1 rans. Amer. Ent. Soc, Vol. .\IX, pp. 121, 122; 



1892. Carlinville, 111. 



