DIPTERA. 259 
Here the proboscis is elongated, and forms a little rostrum. 
OrrocuiLe, Lat. Meig. Macq.(1) 
There, as in all the other Dolichopi, the proboscis is very short, 
or almost non-salient. 
Doticuorus proper. 
Where the third joint of the antenne is almost triangular, but 
slightly elongated, with a seta of moderate length, uninflated and in 
the form of a joint between its middle and extremity. 
These Insects are frequently green or cupreous. The legs are 
long and very slender. They are found on walls, trunks of trees, &c. 
Some of them run along the surface of the water with great celerity. 
The sexual organs of the male are almost always external, large, 
complex, and folded up under the venter. 
D. ungulatus, Fab.; Némoteéle bronzée, De Geer, Insect., VI, 
xi, 19, 20. Antennz but half the length of the head; body bronze- 
green, glossy; eyes golden; legs pale yellow; wings immaculate. 
Its larva lives in the ground; it is long, cylindrical, and fur- 
nished with two points in the form of recurved hooks. On 
the front of the thorax of the nymph are two long horns directed 
forwards, and bent into the figure of an S(2). 
SypisTRoMA, Meig. 
Where the last joint of the antenne is almost in the form of the 
blade of a knife, with a very long seta, inflated like a knot, anterior 
to its extremity(3). 
The male organs of generation in the others are furnished with 
filiform appendages. 
Here, the third joint of the antennz either borders on an oval or 
(1) Lat., Gen. Crust. et Insect., IV, 289. See also Meigen and Macquart. 
(2) For the remaining species, and some others of the following subgenera, see 
a Memoir of the Baron Cuvier, in the Journ. d’Hist. Nat. et de Phys., II, p. 253. 
See also Meigen and Macquart. 
(3) Meig., and Macquart. 
