DIPTERA. 319 



(iages at the posterior extremity of their body, resembling strings or 

 arms ; Reaumur calls them vers polypes. Their usual colour is red. 

 The nymphs inhabit the same element, and respire by means of two 

 exterior tubes, situated at the anterior extremity of the body. Some 

 of tlicm possess the faculty of swimming. 



These Insects are analogous to the Culices, and have been desig- 

 nated by authors vmdcr the name of Tipulce culiciformes. 



Those in which the antennoe of both sexes consist of fourteen 

 (somewhat) oval joints, the last differing but little from the preced- 

 ing ones, and where the wings are laid horizontally one over the 

 other, compose the subgenus 



CoRETHRA, Aleig. 



Tipula citiiciformi9, De Geer, Insect., VI, xxii, 10, 11. A 

 brown body; legs and abdomen grey; nervures of the wings 

 hairy*. 

 Those in which the Avings are inclined, and the antennae arc formed 

 of thirteen joints in the males and six in the females, furnished with 

 short hairs, and the last, as in the preceding sex, very long, consti- 

 tute the suligfenus 



Chironomus, Meig. 

 To which belongs the Tipule annvJaire of the same autlior. 

 Ibid., XIX, 14, 1.5, which is of a brownish-gi-ey, with transverse 

 black bands on the abdomen, and a black point on the wingi-. 



Tanypus, Meig., 

 Where the Avings arc also pendent ; but the antenme consist of four- 

 teen joints in both sexes, the penultiiuate very long in the males; all 

 the others, like those of the antennae of the females, almost globular ; 

 the last somewhat thicker than the preceding ones. To this sub- 

 genus we refer the 



Tipule bigarree. Id., lb., XXIV, 19, which is cinereous; 

 whitish, spotted with blackish ; antennea of the females termi- 

 nating in a button. The larva of the latter sex has four false feet, 

 two near the head, and the rest at the posterior extremity of the 

 body +. 

 Sometimes the antennae, always comjjosed of at least thirteen joints 

 in both sexes, and for the most part granose, are merely furnished 

 with short setae, or at most, and in the males only, with a bundle of 

 hairs at base. They form our TipiUes gallicoles. 



Ceratopogon, Meig. — Ceratopogon, Culicoides, Lat., 



Vv''herc the antennae are simply furnished Avith a bundle of hairs at 

 base. 



Their proboscis, as in the two following subgenera, resembles a 



* For the other species, see Meigen on the Biptera, nnd Lat., Gen. Crust, et 

 Insect., IV, p. 247, et seq. 



+ The same works, and Fab. Syst. Antl. 



J The same, and the Monograph of M. Fallen. 



