BY FREDERICK A. A. SKUSE. 39 



Antennse of the 9 2-+ 12-joinfced, sometimes with one rudi- 

 mentary joint more, the joints pedicelled, cylindrical. 



(a) The second longitudinal vein reaching the margin of the 



wing at its apex. 



1. Flagellar joints of the antennre of the ^ alternately single 



or double. 



* Wings unspotted. 

 ** Wings variegated. 



2. Flagellar joints of the antennse in the ^ quite simple, 



with only one hair-whorl. 



(b) The second longitudinal vein reaching the margin of the 



wing beyond its apex. 



1. Hair-whorls of the antennaj of the ^ equally long oii the 



upper and under sides. 



* Wings unspotted. 

 ** Wings variegated. 



2. Antennae of the ^ decorated with long hairs on the upper 



side. 



Asphondijlia. — The second longitudinal vein ascending from the 

 Ijase in a flattened arcuation, and reaching the margin of the 

 wing beyond its apex. 



Antennto in both .sexes with cylindrical joints, the joints with- 

 out hair-whorls. 



Hormomyia. — The second longitudinal vein ascending from the 

 base in a flattened arcuation, reaching the wing-margin either at 

 or beyond the apex. 



Thorax more or less gibbose, frequently extending over the 

 head in the form of a hood. Flagellar joints of the antenna} in 

 the ^ I'cdiccllcd, tliose of the ^ either pedicelled or sessile. 



(a). Thorax extending over the head in the form of a hood, 

 (b). Thorax gibl»ose. 



ColpoJia. — The Hecond longitudinal vein ascending from the 

 base with a double curvature, reaching the wing-margin Ijeyond 

 the apex. Transverse vein long. 



