340 MOSQUITOES OF XORTH AMERICA 



Thorax reddish-brown, scantily clothed with very small curved hair-like scales of 

 a dull golden-brown to bronzy hue and a few scattered blackish ones, with three rows 

 of black bristles, the median one double; metanotum pale ochraceous brown; scu- 

 tellum pale brown, with a few minute black hair-like scales and seven deep brown 

 border bristles to the mid lobe; pleurae nude, pale ochraceous, with a few black and 

 pale bristles. 



Abdomen deep brown, with basal pale bands which spread out laterally on the last 

 few segments; first segment fuscous with two median patches of black scales; pos- 

 terior border-bristles pale. Legs deep brown, with dull violet reflections, coxse and 

 venter of femora pale, the fore femora rather swollen; apex of femora and tibiae 

 with traces of pale spots; ungues small, equal and simple. 



Wings with rather dense typical brown Culex scales; costal border deeper brown 

 than the rest of the wings; first submarginal cell longer and narrower than the 

 second posterior cell, its base nearer the base of the wing, its stem not quite the 

 length of the cell; stem of the second posterior cell as long as the cell; posterior 

 cross-vein about its own length distant from the mid-cross vein; fringe brown; 

 halteres pale ochraceous, slightly darker at the top. 



Length. 5 mm. 



Habitat. Jamaica (Dr. Grabham). 



Thne of capture. March (2. 3. 02). 



Observations. Described from a single perfect $ taken in the Red Hills, Kings- 

 ton, by Dr. Grabham. 



It is closely allied to C. flavipes, Macquart, but can be told from it by the absence 

 of the two thoracic lines and by the longer stem to the first sub-marginal cell. From 

 G. fatigans, which it also superficially resembles, it can at once be told by the minute 

 hair-like curved thoracic scales. It comes near the African Culex masculus, Theo- 

 bald, in the table (Vol. II., p. 118), having an unadorned thorax, to which it is also 

 closely related, but separated again by the minute thoracic scales. 



Original Description of CirLEx regulator: 



Antennae with the tuft nearly at the outer third, pale at base. Head hairs in 

 threes; body pilose; lateral hairs in twos after the second abdominal segment; 

 tracheae broad. Air tube 7X1, with long single hairs, the pecten reaching to one- 

 fourth. Anal gills long and pointed. 



Collected by Mr. Busck in an old bucket in a field in San Domingo. The adults 

 were named " Culex salinarius Coq." 



The following is an abstract of the table : 



1. Antennas 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 paired tufts posteriorly outwardly (sometimes 



increased by additional ones basally), the subapical one 

 moved laterad out of line, usually situated at the outer third 

 of the tube 14 



14. Air tube \on%, over 5X1, the sides nearly straight without marked 



tapering 15 



15. Body spicular-pilose 16 



16. Air tube 7X1, the tufts single and very long; antennae pale, regulator 



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



Female. Proboscis moderate, subcylindrical, slightly enlarged apically, 

 labellre conically tapered, pale; vestiture of bronzy-brown scales. Palpi short, 

 one-fifth as long as proboscis, moderate, black with a bluish reflection and ^-ith a 

 few outstanding setge. Antenna with the joints subequal, rugose, pilose, black, 

 second joint attenuated at base ; tori subspherical, with a cup-shaped apical ex- 

 cavation, blackish ; hairs of whorls sparse, moderate, black. Clypeus broadly 

 rounded, doubly excavated at base, blackish brown, nude. Eyes black. Occiput 

 sordid brown, clothed with small, narrow, curved pale-brown scales, a patch of 

 narrow, elliptical white scales on lower part of sides and along margins of eyes ; 

 many erect, forked black scales, forming a dense patch on each side of vertex ; a 

 row of bristles along ocular margins. 



Prothoracic lobes elliptical, remote dorsally, clothed with broad white scales 

 and dark bristles. Mesonotum dark brown, with two bare concolorous lines; 

 vestiture of rather sparse, minute, hair-like reddish-brown scales and rows of 



