274 INSECTA. 
cupreous-violet; legs black, with a white ring; wings long, with 
a brown spot. 
The larva lives in sates the body forms an oblong oval, 
narrowed and pointed anteriorly, furnished with a squamous 
head provided with two hooks. ‘The body is interspersed with 
hairs. It becomes a pupa under its own skin, and without any 
material change of form. The perfect Insect issues from its 
prison by driving off the anterior portion. See Réaumur, In- 
sect., IV, Mem., IV and I. 
S. Reaumurii, Meig. Differing from the cuprarius in the © 
abdomen, most of which, or at least the base, is of a blood-red, 
or a brighter tint of the same colour(1). 
Varro, Lat. Fab.—Pachygaster, Meig. 
Only differing from Sargus in the antennz, which are still shorter, 
with the two first joints shorter or wider, or altogether transver- 
sal(2). : 
Our second general division of the Diptera, which are pro- . 
vided with a sucker enclosed in a sheath, and whose antenne 
consist of but three or two joints, comprises those whose pro- 
boscis, usually bilabiate, long, geniculate, and bearing the 
palpi a little above the elbow, is most commonly entirely con- 
tained in the oral cavity, and when always salient, has a sucker 
composed of only two pieces. The last joint of the antenne, 
always accompanied by a stilet or seta, never exhibits annu- 
lar divisions. ‘The palpi, when at rest, are concealed. 
This division will form our fifth family. 
(1) See the same authors. = | 
Wiedemann, in his “ Analecta Entomologica,” has figured a Brazilian species, 
the S. furcifer, remarkable for the scutellum being armed with a long spine, forked 
at the extremity. 
(2) See the same authors. 
