CTJLEX CORKIGANI 387 



Prothoracic lobes elliptical, remote doTsally, luteous, with a few narrow pale 

 scales and a few coarse black bristles. Mesonotum pale brown, luteous in front, 

 a dark diffuse spot at roots of wings ; vestiture of rather coarse, light bronzy- 

 brown, narrow, curved scales, those along anterior margin and angles pale straw 

 colored, three very narrow bare longitudinal lines extending from anterior 

 margin to antescutellar space ; bristles numerous, coarse and long, black. Scu- 

 tellum trilobate with a few small, narrow brown scales, each lobe with a group 

 of long black bristles. Postnotum elliptical, prominent, luteous, nude. Pleurae 

 and coxae very pale luteous, pleurae with a green tint, a few black bristles. 



Abdomen elongate, subcylindrical, depressed, truncate at tip; vestiture dull 

 black vnth a slight bronzy reflection dorsally and on the sides; venter dirty 

 greenish white-scaled. 



Wings moderate, hyaline; petiole of second marginal cell less than half as 

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

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

 moderately dense, broadly linear, brown with a bronzy and blue reflection on 

 costa, scales denser and slightly broader on forks of second vein and apices of 

 third and fourth veins. Halteres with yellowish white bases and black knobs. 

 Legs rather long; vestiture black with a bronzy and bluish reflection; femora 

 paler beneaii to near apices; scales of tibiae somewhat roughened, especially 

 towards tips. Claw formula, 0.0-0.0-0.0. 

 Length : Body about 3 mm. ; wing 3 mm. 



Larva, Stage IV (plate 110, fig. 371) . — Head transversely elliptical, roimded, 

 a lobe projecting from beneath near base of antennae. Antennae large, stout, 

 with a slight notch beyond the outer third with large hair-tuft, the terminal 

 setae longer than the tuft. Ijower pair of dorsal head-hairs long and single, 

 upper pair in fours ; ante-antennal tufts multiple. Lateral comb of the eighth 

 segment a large patch of scales over four rows deep. Air-tube long and slender, 

 11 X 1, the peeten moderate and rather sparse, situated on the basal fourth; 

 four single hairs beyond peeten, evenly spaced, with a minute tuft slightly out 

 of line between the last two. Anal segment nearly twice as long as wide, ringed 

 by the chitinous plate; ventral bxush well developed, confined to the barred 

 area; two long single dorsal hairs on each side. Aiial gills four, equal, shorter 

 than the anal segment. 



The larva was iound in water in a broken bamboo-joint by Mr. Busck. 

 Panama. 



Tabemilla, Canal Zone, July 18, 1907 (A. Busck). 



Culex corrigani was described from a single female specimen, and we have 

 received no further material. It is evidently very closely related to Culex 

 conservator, and may be identical with that species. We are unable to point out 

 tangible differences ia the females with the scant material at hand. However, 

 the larvas show differences which in other forms have proved specific. No doubt 

 the male has short palpi, as in conservator. The female agrees closely with that 

 of conservator in the peculiar character of the vestiture of the occiput and 

 mesonotum, in the scaling of the wings, and in the diffuse dark integumental 

 spots over the roots of the wings ; this latter character shows the relationship 

 of these species with G. ocellatus, in which species the shortening of the male 

 palpi has not progressed so far. Our specimen of C. corrigani is much larger 

 than any conservator and shows a paler mesonotum with broader zone of white 

 scales along the anterior margin. 



