338 INSECTA. 



panied by a seta *. The palpi of the greater number are flattened or 

 laminiform, and laid on the proboscis. 



These characters — a body compressed on the sides, a triangular 

 head, slightly projecting in the manner of a snout, the abdomen 

 curved underneath, and long slender legs furnished with little spines, 

 particularly distinguish the genus 



DoLiCHOPus, Lilt. Fab., 

 Which now forms a small tribe — Dolichopodes — arranged by M, 

 Macquart, in a Very natural order, which we adopt, with the exception 

 of one alteration, Avhich will place Dolichopus proper and Ortochile, 

 with M'hich he finishes, at the beginning. 



Tlie male organs of generation, in some, present laminiform ap- 

 pendiiges. 



Here the jirobuseis is elongated, and furms a little rostrum. 



Ortochile, Lat,, 3Ieig., Alacq. f 

 There, as in all the other Doiichopi, the proboscis is very short, or 

 almost non-salient. 



Dolichopus proper. 

 Where the third joint of the antenncE is almost trianglar, 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 fovmd on walls, trunks of trees, &c. 

 Some of them run along the s\irface 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.imgulatus, Fab.; Nemotele bronxee, De Geer, Insect., VI, 

 xi, 19, 20. Antennte 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 J. 



Sybistroma, JSleig., 

 Where the last joint of the antenuce is almost in the form of the blade 

 of a knife, with a very long seta, inflated like a knot, anterior to its 

 extremity §. 



The male organs of generation in the others are furnished with 

 filiform appendages. 



* In several, the last joint of the antennae differs but little from that of the 

 pvecedinEC Diptera, but the relative position of their wings and their reticulation 

 present distinctive characters. 



t Lat., Gen. Crust, et Insect, IV, 289. See also Meigen and Macquart. 



+ 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. 



§ Meig. and Macquart. 



