DIPTERA. | 245 
Coleopterz, which they then exhaust by suction. Their larve have 
a small squamous head, armed with two movable hooks, live in the 
earth, and there become nymphs, whose thorax is furnished:with 
dentated hooks, and the abdomen with small spines. 
In some—.4silici, Lat.—the head is transverse; the eyes are late- 
ral and distant, even inthe males, and the proboscis is at least as 
long as the head. The wings have a complete cubital cell, forming 
an elongated triangle near the internal margin—the last of all— 
and terminating at the posterior edge. The epistoma is always 
bearded. 
Sometimes the tarsi terminate by two hooks, with as many inter- 
mediate pellets. 
Here, the terminal stilet of the antennz is but slightly apparent, 
or when it is very distinct, its second and last joint is not prolonged 
in the form of a seta. 
There are some of these in which the antennz are hardly longer 
than the head; their stilet is barely visible or very short, conical and 
pointed; the part of the head from which they arise is not promi- 
nent, or but slightly so. 
Lapuria, Meig. Fab. 
Pay 
Where the stilet of the last joint of the antennz, which is either 
fusiform or resembles a small obtuse head, is not (or barely) visible, 
and where the proboscis is straight(1). 
ANCILORHYNCHUS, Lat. 
Where the stilet of the antennz is hardly salient and pointed, and 
where the proboscis has the form of a compressed, arcuated, and 
hooked rostrum(2). 
Dasypocon, Meig. Fab. 
Where that stilet is very distinct and conical, and the proboscis 
is straight(3). 
(1) See Lat., Gen. Crust. et Insect, IV, 298; Meig., Fab., Wied., and Macq. 
(2) Two species collected by Count Dejean in Dalmatia, and another in the 
East Indies. 
(3) See the authors already quoted. 
