39 
145. With one or more pairs of frontal bristles below base of the second antennal 
JOHN) codecs 26 SH ReS CON ABE REE Seno a Sosa Geese es See ene Seeman cea 147. 
Without any frontals below base of second antennal joint............---- 146. 
146. Occiput at most only slightly convex, body short and robust. (p. 70) @strophasia. 
Occiput strongly convex, body elongate and slender.-.......-. (p. 72) Lutriva. 
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 
bristlemvesrm the bas@ies ace sere = = 5 erence asiesee ses, bier (p. 59) Celatoria. 
148. Antenne not reaching below the lowest‘fourth of the face... - (p. 81) Biomyia. 
Antenne almost or quite reaching the oral margin.....:.--.-(p. 60) Hypostena. 
(Gee ATIstasbare. OLNvery, Short pUbescenh 9-1 -- - 5. a5. es pe era ase eee ee 150. 
Avista bearing hairs which are as long as its greatest diameter, antenne reach- 
es NO rey LETH OLE ae TEE) Loe Sea or Bee eae nee moncee sandeespse (p. 66) Leskia. 
SOM OchyeshOLtramONmOWUSUie asec Satna yas tas Aa seas aise cies emis oe cie = acietrae iby. 
Body elongate and slender, antennie not reaching below the lowest third of the 
face, apical cell closed and short petiolate........-...- (p. 72) Nanthomelana. 
151. Tip of antennie not below lowest third of the face, frontal bristles usually not 
descending below base of the second antennal joint ...--.--.....--.---- 152. 
Tip of antenne at or below lowest fifth of face, frontals usually descending 
below base of the second antennal joint. - Lee eek ee Pes, alaey 
52. Head over twice as high as long, occiput at moe only stiettly convex. 
(p. 70) strophasia. 
Head about one and one-third times as high as long, occiput usually strongly 
COMICS Ue Soe ne gee ee GORGE BREE GACT nee eae (p. 71) Clytiomyia, 
155. Third vein bearing only two or three bristles near the base, head unusually 
QO cn coSs 6 oS ead on Oh HO ace SROs ene Seer ae ene ene (p. 70) Gstrophasia. 
Third vein bristly almost to the small crossvein, head not unusually short. 
(p. 75) Siphona. 
UNRECOGNIZED GENERA. 
The following genera, which have been reported from America north 
of Mexico, together with the species referred to them, have not heen 
recognized by the writer, or else the species belong to other genera: 
Baumhaueria analis yau der Wulp, belongs to Cheetogiedia. 
Besseria (Wahlbergia) brevipennis Loew. Nebraska. 
Chrysosomu n. sp. Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, Vie pa4on: 
1891. Georgia. 
Clista americana Townsend is a synonym of Myiophasia wnea Wied. 
Clistomorpha hyalomoides Townsend, Canadian Entomologist, Vol. XXIV, pp. 79 to 
81; 1892. New York. 
Cryptopalpus flaviceps Bigot, Rocky Mountains, and melanopygatus Bigot, Washing- 
ton, Bulletin Soc. Ent, France, p. 141; 1887. 
Daocheta harveyi Townsend, Trans. Amer, Ent. Soc., Vol. XIX, pp. 97 and 98; 1892. 
Maine. 
Eliozeta americana Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 388; 
189]. Georgia. 
Euceromyia robertsoniti Townsend, Trans. Amer. Ent. Soc., Vol. XIX, pp. 115 to 116; 
1892. Southern I]linois. 
Eucnephalia gonoides Townsend, Canadian Entomologist, Vol. XXIV, pp. 166, 167; 
1892. New Mexico. 
Eumyothyria illinoiensis Townsend, Trans. Aimer. Ent. Soe., Vol. XIX, pp. 121, 122; 
1892. Carlinville, Il. 
