THE CANADIAN ENTOMOLOGIST. 15S 



Differs from Microtropesa Mcq. as follows: Parafacials bare, 

 only with some hairs above. Facial carina narrow, sunken, not 

 easily visible from in front. No ocellar bristles. Male claws long 

 and slender, fem^ale claws short. Vertex in female as wide as one 

 eye, in male narrower. Several rows of bristles on parafrontals 

 in both sexes, but orbitals apparently absent in female as well 

 as male. Abdomen of female flattened and pointed, that of male 

 more oval; male hypopygium small, not directed forward. Front 

 prominent, face receding, epistoma not prominent. Third antennal 

 joint over twice to three times as long as second. Hind cross-vein 

 sinuate, at two-thirds distance between small cross-vein and 

 cubitus. 



Acephana, new genus. 



Genotype, Masicera rubrifrons Mcq., 1847, Dipt. Exot. Suppl. 

 II, 85, Tasmania. Brauer, Sitz. Ak. Wiss. CVI, 339-40. 



DifYers from ilficro/rc^e^a Mcq. as follows: Eyes hairw Ab- 

 dominal macrochaetae weak. Vibrissal angles somewhat convergent. 

 Third antennal joint pointed on upper apical corner, like that of 

 Acemyia. No ocellars. Female with two orbitals, and two verticals. 

 Differs from Goniophana (equals Tritaxys Mcq.) in the hind tibia; 

 not ciliate; and from Gccdiophana in the short second aristal joint. 

 Epistoma not very prominent. Arista thickened to middle. Hind 

 cross-vein sinuate, at two-thirds distance between the small cross- 

 vein and bend of fourth. 



Opsophana, new genus. 



Genotype, Masicera rufifacies Mcq., 1847, Dipt. Exot. Suppl. 

 II, 87, Tasmania. Brauer, Sitz. Ak. Wiss. CVI, 340. 



Differs from Microtropesa Mcq. as follows: No ocellar bristles. 

 Eyes thickly hairy. Hind tibia^ pectinate, with longer bristles 

 below\ Abdomen with Only thin bristle-like macrochaetae. Male 

 claws long. Epistoma much produced, the vibrissae situated high 

 above oral margin. Related to Goniophana and Acephana. Front 

 of male narrow. Frontals not descending below base of antenna?. 

 Third antennal joint about four times as long as the second. Apical- 

 cell ending near wing apex. 



