CULEX IMITATOR 431 



silvery-white scaled. Abdomen deep brown, with basal white bands, expanding 

 laterally into basal white spots. Fore and mid legs unhanded, hind with broad basal 

 white bands. 



J". Head brown, covered with silvery-white narrow-curved scales on the occiput, 

 with a dividing line in the middle, the scales turning outwards on each side from 

 this line, sides of the head covered with small flat white, then flat dusky scales. Pro- 

 boscis dark brown, almost black, slightly expanded apically; palpi as long as the 

 proboscis, black scaled, with four white bands, the bands being on the basal part of 

 the joints; the apical joint slightly shorter than the penultimate, both with a few 

 long black bristles, base of palpi white. Antennae brown, with brown plumes. 



Thorax brown, ornamented with small, bright, chestnut-brown and silvery, 

 narrow-curved scales, as follows: Bright chestnut-brown in the middle, with two 

 parallel bare lines and a narrow border of white scales on each side of the bare 

 lines in front, a few white scales in the middle in front, pure silvery white at the 

 sides of the mesothorax and scattered white scales at the back; bristles brown, 

 longish, thick over the roots of the wings; scutellum testaceous brown, covered with 

 narrow-curved white scales and with six brown border-bristles to the mid lobe; 

 metanotum brown; pleurs pallid. 



Abdomen deep brown to black, with basal white bands, which spread out laterally 

 to form basal white spots, last segment with all dull white scales, hairy; border- 

 bristles short in the middle of the segments. Legs dark brown, femora pallid be- 

 neath, the fore and mid unhanded, the hind with broad basal white bands on the 

 metatarsi and tarsi; the fore legs have an apical white spot on the femora and 

 tibiae; the mid have an apical white femoral and tibial spot and a small basal white 

 spot, almost a band on the metatarsi; fore and mid claws unequal, hind equal; the 

 fore claws both uniserrated; the larger one of the mid very narrow and fragile, with 

 a very thin curved tooth on its basal half; (smaller tooth?). 



Wings with typical Culex scales; fork-cells of moderate size, first sub-marginal 

 longer and narrower than the second posterior cell, its base nearer the base of the 

 wing, its stem less than half the length of the cell; stem of the second posterior cell 

 nearly as long as the cell; posterior cross-vein at least three times its own length 

 distant from the mid cross-vein. Halteres with pale ochraceous stem and pale brown 

 knob. 



Length. 3 mm. 



HaMtat. Brazil (Dr. Lutz). 



Observations. Described from a single perfect male. It is a very distinct species, 

 resembling at first sight Stegomyia fasciata, but easily distinguished by the absence 

 of banding on the fore and mid legs, but especially by the scale structure, which 

 shows it to be a typical Culex, the scales of the head and scutellum being narrow- 

 curved ones, not flat as in the genus Stegomyia. 



Dr. Lutz sent me this specimen, stating it to be a " bromelia feeder." 



Original Description of Ctilex daumasturits : 



Distinct from any known larva by the very long air tube (12 X 1) with a swelling 

 at the outer third. 



It was collected by Mr. Busck in the leaf corner of a Century Plant near the pitch 

 lake. La Brea, Trinidad. A second specimen has been sent us by Mr. Urich from 

 Bromelias at Arima, Trinidad. The adult was named " Culex imitator Theob." 

 by Mr. Coquillett, and it may be that species, which was bred from Bromelia water 

 by Dr. Lutz in Brazil; but we do not feel certain enough of it to accept the name. 



The following is an abstract of the table : 



1. Antennae with the tuft outwardly placed, the part beyond slender. . 5 

 5. Air tube four times as long as wide or over 7 



7. Anal appendages four, normal 8 



8. Air tube with four to ten paired tufts along the posterior line in a 



straight row, none displaced, or the hairs obsolete or absent. 18 



18. Air tube without a crown of spikes, smooth throughout 19 



19. Air tube with small double or single hairs, or bare 31 



31. Air tube very long with a swelling at outer fourth daumasturus 



Original Description of Culex vector: 



Antennae with the tuft at the outer third, pale; body glabrous; lateral abdominal 

 hairs in four on first segment, twos on second, fours on third to fifth, single and long 

 on the sixth. Air tube 9X1, wide at base, the pecten sparse and long, reaching to 

 one-fourth, followed by a little double-haired tuft. Lateral comb of the eighth seg- 

 ment a large patch of long spines. Anal gills moderate, pointed. 



