CULEX CHRYSONOTUM 311 



coppery luster and dark blue reflections in some lights, no dorsal segmental bands; 

 segments 5, 6, and 7 with silvery basal lateral spots; beneath the segments have 

 broad silvery white bands at the bases, the apices dark-scaled, with coppery luster; 

 wings with narrow dusky scales along the veins; legs dark-scaled, with strong bronzy 

 luster, the ventral surface of the femora silvery-scaled, the inner side of the tibiae 

 obscurely silver-scaled, the knees touched with silver scales; tarsi not ringed; 

 claws simple. Length 3 mm. 



Male. Proboscis long and slender, enlarged at the apex; palpi considerably longer 

 than the proboscis, black-scaled, without annulations, the apical portion clothed with 

 long black hairs; head and thoracic markings as in the female; abdomen dark-scaled 

 above, with coppery luster; segments 4 to 8 with basal lateral silvery spots; the under 

 surface with silvery basal segmental bands. Length, 3 mm. 



Nine specimens, Ancon, Canal Zone, Panama; Cartagenita, Paraiso District, and 

 Miraflores in the Canal Zone, bred from larvse in a ditch, from a small patch of algae 

 beside railroad track, and from a swamp (A. H. Jennings). 



Type. Cat. No. 11966, U. S. N. M. 



Similar to C. si)issii)es Theobald and C. fur Dyar and Knab, but easily distin- 

 guished by the narrow wing-scales and the more extensive golden area of the meso- 

 notum. 



Description of Female, Male, and Larva of Culex chrysonotum: 



Female. Proboscis rather long, stout, somewhat enlarged at apex, vestitnre 

 black with a slight bronzy reflection ; setae minute, curved, black, those on labellse 

 more prominently outstanding. Palpi short, one-fifth as long as proboscis, 

 clothed with bronzy-black scales, a fe\v coarse bristles near base. AntennsB 

 moderate, joints subequal, second joint slightly swollen, others coarsely rugose, 

 pilose, blackish ; tori subspherical with a cup-shaped apical excavation, blackish ; 

 hairs of whorls sparse, moderate, black. Clypeus rounded triangular, prominent, 

 blackish. Occiput dark brown, clothed with dense, narrow, curved golden 

 scales on vertex, flat whitish ones on sides, many upright, forked golden scales 

 on nape ; a row of coarse black bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, dark brown, clothed with narrow, 

 curved dark-brown scales and black bristles. Mesonotum dark brown, clothed 

 with narrow, curved scales, anterior two-thirds golden yellow, posterior third 

 dark brown, with six narrow lines of golden scales reaching from anterior golden 

 area to scutellum, two of these lines bordering ante-scutellar space, another pair, 

 outward from these, third pair above roots of wings ; some dark-brown scales 

 along the lateral margins which form an indentation behind anterior angle and 

 before root of wing. Scutellum trilobate, dark brown, clothed with narrow, 

 curved golden-yellow scales, each lobe with a tuft of black bristles. Postnotum 

 elliptical, prominent, dark brown, nude. Pleura? and coxae blackish brown, 

 clothed with patches of dirty-white scales and rows of dark bristles. 



Abdomen subcylindrical, depressed, truncate at tip; dorsal vestiture of 

 black scales with a bronzy luster, a row of pale bristles at tip of each segment ; 

 a row of lateral, basal, segmental, large, triangular, dull silvery white patches on 

 fifth, sixth and seventh segments; venter blackish scaled, with narrow, seg- 

 mental, basal white bands. 



Wings moderate, hyaline ; petiole of second marginal cell one-fourth as long 

 as its cell, that of second posterior cell slightly shorter than its cell ; basal cross- 

 vein distant more than its own length from anterior cross-vein ; scales of veins 

 brown, with a blue reflection on costa, outstanding one linear, those on forks of 

 second and fourth veins and on apical portion of third vein broader, rounded, 

 and very dense. Halteres brownish with minute white scales. 



Legs moderate, middle femora stout ; vestiture of black scales, with blue and 

 bronzy luster, femora pale beneath with a brassy luster ; front and mid tibiae and 

 tarsi with a brassy luster on under side; knees narrowly pale scaled. Claw 

 formula, 0.0-0.0-0.0. 



Length : Body about 2.5 mm. ; wing 2.5 mm. 



