INSECUTOR INSCITI^ MENSTRUUS 165 



twice as wide as parafacialia, the vibrissal area well set with 

 microchsetas. Third antenna! joint twice as long as second. 

 Arista pubescent half way. Female vertex little more than 

 half of one eye, front widening very slightly therefrom. Ocelli 

 well developed, ocellar bristles absent. Prosternal membrane 

 well inflated. Preacrostichals present. Strong stump at 

 cubitus. Seventh tergite of female showing as a pair of heavy 

 forceps with dense hair-brushes on inside edge. 



Ormiophasia busckii, new species. 



Length. 8 mm. ; width of abdomen, nearly 4 mm. One fe- 

 male, Cabima, Panama, May 34, 1911, collected by Mr. August 

 Busck, in whose honor the species is named. 



Fulvous, with thin coating of tawny pollen on head and 

 silvery on mesoscutum, leaving on latter five fulvous vittfe. 

 Abdomen rather deeply brownish dorsally. Tibire and tarsi 

 tinged with brown. Tegulse smoky-yellowish. Wings nearly 

 clear. Epaulet concolorous with wing-base and pleura. 



Therobia abdominalis Wiedemann. 



Neither Wiedemann nor Brauer mention the enormously 

 swollen prosternal membrane of female nor the entire lack of 

 ocelli. Their specimen was a female. 



Aulacocephalopsis, new genus. 



Genotype, Aulacephala badio Gerstaecker, 1803, Verb. Z. B. 

 Ges. Wien, xiii. 



Belongs in the Ormiinae, and differs from Aulacephala 

 as follows : Head not flattened, that of male subhemi- 

 spherical, that of female with prominent front. Facial 

 carina continued downward in a shallow furrow, which is the 

 greatly narrowed and extended epistoma, lying between the 

 greatly enlarged facialia. Antennal pit shallow. Third an- 

 tenna! joint reniform, but little longer than second. Arista 

 very long, thin, bare, thickened only at l)ase. Eyes of female 

 proportionately short, those of male contiguous above and 

 descending low. In the male the anterior ocellus is large, but 

 the two posterior ocelli are small and pressed into the sides of 



