DIPTERA. 265 
Curysops, Meig. 
To which belongs the 
C. cecutiens, Fab.; De Geer, Insect., VI, xiii, 3,5. Eyes 
golden, with purple points; thorax yellowish-grey, streaked with 
black; abdomen yellowish above, with a broad black spot, fork- 
ed at the end, on the two first annuli; two others, elongated, and 
of the same colour on each of the following ones, and three 
blackish-brown and transversal ones on the wings. They are 
constantly persecuting the Horse(1). 
The others are destitute of ocelli; the last joint of their antennz, 
sometimes cylindrical, presents but four rings. 
Here, as in 
Hezmatorota, Meig. 
It is subulate, and the first is thick, and almost borders on an 
oval in the males(2). 
There, as in 
Hrxatroma, olim Heptatoma, Meig. 
The antenne, longer than in the preceding ones, are cylindrical; 
the last joint is much elongated(3). 
FAMILY IV. 
NOTACANTHA. 
The fourth family of the Diptera, as well as the preceding 
one, presents antennx of which the third and last joint is divi- 
(1) See Fab., Lat., Meig., Fall., Wied., Macq., &c. 
(2) The same authors. 
(3) Idem. 
Vout. 1V.—2 I 
