388 ATTEMPTED DIVISION OF BRITISH INSECTS. 



motion in water is like that of a leech. Pupa also aquatic, but 

 quiescent ; ovate, gibbous, brown-coloured, clearly exhibiting all 

 the parts of the future imago : four double filaments, nearly as 

 long as the pupa, arise from the region of the prothorax on each 

 side of the head ; these are probably organs of respiration ; the 

 pupa is inclosed in a sheath, like a watch-pocket, the anterior 

 portion alone being visible, the sheath being attached to some 

 substance under the water. Imago, with antennas, eleven-jointed, 

 very short ; maxillary feelers elongate, incurved, composed of 

 four distinct joints, the fourth very long and pointed ; the labrum, 

 mandibles, and maxillae sharp and wedge-shaped ; the labium 

 fleshy and bilobed ; ocelli none ; wings very wide, with stout 

 costal nervures, and scarcely any elsewhere ; legs short, and 

 frequently hairy ; tarsi four-jointed ; mesothorax globose, very 

 prominent; body short and small, colour black. Inhabits forests, 

 woods, and all damp places, feeding on the blood of man and ani- 

 mals ; and is perhaps the most annoying and wearisome persecutor 

 with which mankind is acquainted. Sirnulia. 



Natural Order. — Culicites, Gnats. 



Larva elongate, carnivorous, active, aquatic. Pupa equally active, 

 but rather shorter, and the head and prothorax much incrassated. 

 Imago, with fourteen -jointed antennae, plumose in the males, 

 hairy in the females ; labium slender and elongate, forming, 

 together with the mandibles, maxilla?, tongue, and labrum, (which 

 are all fully developed, and as long as the labium,) a porrected 

 blood-sucking apparatus ; the maxillary feelers are long, di- 

 varicating, and clavate ; all the organs of the mouth exceed the 

 antenna? in length ; ocelli none; wings linear, covering the body; 

 body narrow, linear, elongate ; legs very long. Inhabits woods, 

 &c. entering houses ; feeds on the blood of man and quadrupeds. 

 Culex, Anopheles, (JEdes), Chironomus ? h Corethra ? Tanypus ? 

 Ceratopogon ? Sphceromias ? The last five genera differ much 

 in the antenna?, mouth, &c. and properly form several distinct 

 orders. 



Natural Order. — Psychodites, Moth Gnats. 



Larva and pupa unknown. Imago, with antennae, filiform, and 

 perfectly simple, alike in both sexes ; labium short, entire, 



h The order Culicites appears to require division. The British Culicina may 

 probably bo divided thus : Psychodites, Corethrites, Chironomitcs, Culicites, Cera- 

 topogonites, Sphceromyites, Simulates. 



