CULEX CAECINOPHILUS 413 



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 dense and fine; lateral hairs in threes after the second seg- 

 ment carcinophilus 



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



Female. Proboscis rather short and moderately stout, enlarged at apex, black 

 with bronzy luster, labellffi paler; setae minute, curved, black, those on the 

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

 proboscis, brown scaled. Antennae slender, as long as proboscis, with whorls of 

 rather long and sparse hairs; tori brownish. Clypeus large and prominent, 

 subconical, brown. Occiput clothed Avith flat, broad black scales with a bronzy 

 luster, and sparse, slender, erect, forked black scales dorsally; ocular margins 

 broadly and the cheeks white scaled. 



Prothoracic lobes elliptical, remote dorsally, clothed with pale scales and 

 coarse bristles. Mesonotum dark brownish; vestiture rather dense, of small, 

 narrow, curved light bronzy-brown scales; setee rather sparse but coarse and 

 long, arranged in subdorsal and lateral rows and a small median group near 

 front margin. Scutellum trilobate, with narrow, curved bronzy-brown scales, 

 each lobe with a group of black setfe. Postnotum luteous, with a faint median 

 ridge, nude. Pleurae and coxae pale grayish luteous, with rows of dark bristles. 



Abdomen subcylindrical, depressed, truncate at tip, with coarse terminal 

 bristles; dorsally clothed with bronzy-brown scales, with lateral, basal, seg- 

 mental, leaden white triangular spots ; venter bronzy brown, with leaden white 

 basal segmental bands, broadest at middle; hind margins of segments with 

 sparse pale setje, 



Wings moderately broad; veins with brown scales, mostly narrow, but nar- 

 rowly ovate on apical portion of wing and dense along forks of second vein; 

 petiole of second marginal cell about one-fifth the length of its cell; that of 

 second posterior cell shorter than its cell; basal cross-vein more than its own 

 length distant from anterior cross-vein. 



Legs rather long, slender; vestiture brownish black; femora with blue 

 iridescence and pale beneath to near apices ; tibiae and tarsi with bronzy luster. 

 Claw formula, 0.0-0.0-0.0. 



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



Male. Proboscis moderately long, rather stout, straight, enlarged at apex, 

 brownish-black scaled, labellfe paler. Palpi long and slender, slightly exceeding 

 the proboscis in length ; last two joints and end of long joint slightly thickened 

 and with numerous coarse long hairs ; vestiture of bronzy-brown scales, without 

 pale rings. Antennae densely plumose, with very long brown hairs. Coloration 

 similar to the female. Abdomen long and slender, slightly larger at apex, 

 lateral basal white marks visible dorsally on fifth, sixth, and seventh segments; 

 under surface with numerous scattered hairs; lateral ciliation coarse but not 

 very long. Wings narrower than those of the female, the stems of the fork-cells 

 slightly longer; vestiture a little sparser. Claw formula, 1.0-1.0-0.0. 



Length : Body 2.5 mm. ; wing 2.5 mm. 



Genitalia (plate 12, fig. 85) : Side-pieces over twice as long as wide, conically 

 tapered ; marginal prominence extending from middle to near tip, divided into 



