COKLTIIUA. 251 



are articulated at the tip, ainl with two sliort palpi. The abdo- 

 men has a fan of hairs at the tip beneath. The pupa somewhat 

 like tliat of Culex, but straight, and with pointed thoracic ap- 

 pendages. 



"The larva of C. cuUciformis much resembles that of Culex pl- 

 piens in foroi, but differs from it in its motions and station of 

 repose. Instead of being suspended at the surface with its head 

 downwards, it usually, like fishes, remains in a horizontal position 

 in the middle of the water. A\'hen it ascends to the surface it is 

 always by means of a few strokes of its tail, so that its motion is 

 not equable, but by starts. It descends again gradually by its 

 own weight, and regaius its equilibrium by a single stroke of the 

 tail. Its anus is furnished with a ])air of oars or natatory laminpe, 

 by which it rises to the surface. The tracheae appear to proceed 

 from a pair of oblong vesicles of considerable size in the thorax, 

 and towards the anus they form two other smaller ones." 

 a. Tai'si not dotted. 



b. Autennfe with brown bands. Species 1. 



h b. Autennffi without bands. Species 2. 

 a a. Tarsi dotted. Species 3. 



1. plumicornis, Y. E. S. iv. 246. 58 (1792); Meig. ; Mcq. ; 

 Gucr. ; Zett. ; Gim. — crhlalllna, 1). G. — lateralis, Latr. ; Panz. ; Laiu. ; 

 Meig. Kl. Zw. — hafniensis, Gmel. Mas et Fiem. fusca, anteiuds testacels 



fusco-cinctis, tlioracis vittis diiabus lateralibus pectoreque albidis, alls 

 subcinereis, venis pedibusque testaceis, lialteribus albis, abdoiuine pal- 

 lida fiisco ; Mas, anlennanuti plinnis testaceis. Long. 3; alar. 5 liu. 



Brown. Antennce testaceous, with brown bauds. Thorax with a 

 whitish stripe on each side. Teotus whitish. Wings slightly greyish ; 

 veins and borders thickly cihated, the former testaceous. Halteres 

 white. Abdomen pale brown, hairy. Legs pale testaceous, pubescent. 

 Male. Plumes of the antenna testaceous. 



Generally distributed. (E. S. I.) 



2. culiciformis, 13. G. Ins. iv. 144. 16. pi. 23. f. 3-5 (1783); 

 Latr.; Lam.; INIeig. ; INIcq. ; Lehm. Mas et Fern, obscure fusca, an- 

 tennis nigris, thoracis lateribus pectoreque palUde testaceis, alis sub- 

 cinereis, venis jjcdibusque testaceis ; Mas, autennaram jduniis nigris. 

 Long. 3 ; alar. 5 lin. 



Dark brown. Antennce black. Pectus and sides of the thorax pale 

 testaceous. Wings slightly greyish ; veins and borders thickly ciliated, 

 the former testaceous. Halteres white. Abdomen brown, hairy. Legs 

 testaceous, pubescent ; tibiie pilose. Male. Flumes of the antennce 

 black. 



Not generally common, bid sometimes appearing in great i)ro- 

 fusion. (E. S. I.) 



