322 MOSQUITOES OF NORTH AMERICA 



The larvae live in ground pools. Mr. Jennings got them in a swampy pond in 

 bamboo woods and in holes in rocks, in the latter case associated with Anopheles 

 eiseni. 



Panama. 



Tabermlla, Canal Zone, December 12, 1908 (A. H. Jennings) ; Upper Peqnini 

 River, March 27, 1909 (A. H. Jennings). 



CULEX NIGRICORPUS (Theobald). 



Aedes nigricorpus Theobald, Hon. Culicid., ii, 231, 1901. 



^des nigricorpus Giles, Gnats or Mosq., 2 ed., 482, 1902. 



TerralUna nigricorpus Theobald, Mon. Culic, lii, 295, 1903. 



Terrallina nigricorpus Blanchard, Les Moustlques, 417, 1905. 



JEdes (?) nigricorpus Theobald, Gen. Ins., Dipt., fasc. 26, 35, 1905. 



Isostomyia (?) nigricorpus Coquillett, TT. S. Dept. Agr., Bur. Ent., Tech. ser. 11, 24, 



1906. 

 Yerrallina nigricorpus Peryassti, Os Culic. do Brazil, 254, 1908. 

 YerralUna nigricorpus Theobald, Mon. Culic, v, 495, 1910. 



Obioinai, DESCRrpnoN of Aedes NiOBicoKPtrs : 



Thorax black, with deep bronzy-black curved scales; abdomen black, with white 

 lateral spots and white ventral bands; legs black; ungues of the $ equal and simple; 

 wings smoky, with deep brown scales; stem of the first sub-marginal cell short. 



$. Head black, clothed with flat dusky scales over the occiput and pale smoky- 

 grey ones at the sides, with numerous black upright forked scales and long black 

 bristles; eyes black and silvery; palpi short, dark brownish-black; antennas black, 

 basal joint black, testaceous inside; proboscis and clypeus black. 



Thorax black, densely clothed with a felting of a narrow curved bronzy-black 

 scales and two rows of black bristles and numerous black bristles over the roots of 

 the wings; pleurae dark brown, with a few indistinct patches of grey scales; scu- 

 tellum brown, with narrow curved bronzy scales and black " border-bristles." 



Abdomen black, clothed with deep fuscous-brown scales, each segment with basal, 

 lateral, white spots and brown posterior " border-bristles " ; first segment black, with 

 numerous long black bristles; venter black, with basal white scaled bands. 



Legs black scaled; femora, especially of the fore legs, rather thick and bristly; 

 coxae pale brown; ungues equal and simple. 



Wings smoky brown; veins densely brown scaled; long scales on the stems of the 

 second and fourth long veins; scales on both branches of the fork-cells and the third 

 long vein dense, short and rather thick; first sub-marginal cell long, about five times 

 the length of its stem, its base much nearer the base of the wing than that of th« 

 second posterior cell; stem of the latter equal to about two-thirds the length of the 

 cell; posterior cross-vein about twice its own length distant from the mid cross-vein. 



Halteres with pale ochraceous stem and fuscous knob and part of the stem. 



Length. — 2 to 3 mm. 



Habitat. — Itacoatiara, Lower Amazon (Austen) (96, 80). 



Time of capture. — ^February. 



Observations. — A small black species very like Ae. Butleri, mihi, but differing 

 from it in two respects: — 



(i) The fork-cells are relatively very much longer than in Ae. Butleri, in which 

 the stem of the first sub-marginal cell is more than half the length of the cell, whereas 

 in this species the stem is short; 



(il) There are nimierous upright forked scales on the head, which do not appear 

 to exist in Ae. Butleri. 



Unless these two characters are looked for the species may easily be confounded, 

 in spite of their widely separate habitats. 



Desceiption of Aedes niqeicobpus by Gii.es : 



Veins of wing very densely clothed with uniformly black, long scales; anterior 

 fork-cell three and a half times as long as Its stem, the latter much shorter than the 

 stem of the shorter and wider posterior fork-cell, which Is, however, nearly twice as 

 long as its stem. Tarsi uniformly black. Thorax clothed with narrow curved, black 

 scales, on a black ground. Abdomen, seen from above, uniformly black, but with 

 small white lateral spots. 



$.— The uniformly sooty tint of this species leaves little room for description. 

 Seen from above it is entirely so, with the exception of a few white scales on the 



