432 MOSQinTOBS of north AMERICA 



Collected by Mr. Urich in Trinidad from Bromelia water. It was named by Mr. 

 CJoguillett " Culex varipalpus Coq.," but on our remonstrating with him, it was 

 changed to "Culex imitator Theob." We cannot adopt this name, either. (See 

 remark under the preceding species.) 



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 uniform, without any swelling 32 



32. Air tube with slight tufts 33 



33. Pecten of the air tube reaching one-fourth or less 35 



35. Pecten sparse and long 36 



36. Lateral hairs in fours after the second segment; comb of shorter 



spines and more rows deep vector 



Obibis^ai, Description op Micboct7I.ex abgentboumbbosus : 



Head silvery grey; proboscis unhanded. Thorax rich brown in the middle, silvery 

 at the sides, in front and behind. Abdomen deep brown, with small basal white 

 median and lateral spots. Hind legs with pronounced white basal bands, just traces 

 on the fore and mid legs. Male palpi deep brown, acuminate with three prominent 

 white bands; no hair-tufts. 



?. Head deep brown, almost black, clothed with rather long narrow-curved silvery 

 grey scales and flat similar coloured lateral ones, some ochreous upright forked 

 scales behind, the whole head somewhat ragged. Palpi, proboscis and antennse deep 

 brown. 



Thorax black, clothed in the middle with small, narrow-curved bright bronzy- 

 brown scales, around this area larger silvery white scales forming a broad area in 

 front, also at the sides and just before the scutellum, where they surround the bare 

 space; scutellum brown, with silvery-grey narrow-curved scales; four black bristles 

 to the posterior border of the mid lobe and numerous long ones over the roots of the 

 wings; metanotum deep brown; pleurae pale brown and grey. 



Abdomen deep blackish-brown, with a small median basal pale spot and white 

 lateral basal spots; posterior border-bristles rather pale, short, but a long one on 

 each side; venter with broad basal white bands. 



Legs deep brown; coxae and femora at base and beneath pale; in the fore legs the 

 apex of the femora and tibise are white, in the mid legs there is a basal white band to 

 the first tarsal, and the next two tarsals have very narrow bands; in the hind legs 

 there is a broad band to all the segments, the hind tarsal being nearly all white; 

 femora, tibiae and first tarsals spinose; ungues equal and simple; the white apices 

 of the femora and tibiae are rather more densely scaled than the rest, so look swollen. 

 Wings with the first sub-marginal cell much longer, but very little narrower than 

 the second posterior cell, its base nearer the base of the wing, its stem about one- 

 third the length of the cell, stem of the second posterior about two-thirds the length 

 of the cell; posterior cross-vein longer than the mid, about one and three-fourths 

 its own length distant from it; stem and lower branch of the fifth long vein with a 

 double row of rather long median vein scales; outer border of costa spinose. 

 Length. — 2 mm. 



cJ". Head as in ?, but with more forked scales; palpi thin, deep brown, with three 

 white bands, one at the base of the last two segments and a broader one on the ante- 

 penultimate, the last segment shorter than the penultimate, the apical one, bluntly 

 acuminate, ending with a few spines, no lateral hairs, a few long hairs on the penul- 

 timate; proboscis thin, much expanded apically. Antennae plumose. Thorax as in $, 

 but with longer black bristles. The abdomen with basal white bands. Basal segment 

 of the genitalia, with a prominent lateral lobe, with thin long chltinous flat bristles, 

 becoming almost hair-like at the apex and curved; the claspers rather short and 

 broad, with the lateral terminal segment slightly clavate and passing beyond the 

 apex of the clasper. 



Fore and mid ungues unequal, both uniserrate, the larger with a long curved basal 

 lateral tooth; hind equal and simple. 



Wings with the scales broader than in the $, especially on the apical parts of the 

 veins; first sub-marginal cell much longer and slightly narrower than the second pos- 

 terior cell. Its base nearer the base of the wing than that of the second Dosterlor cell. 



