24 The Mosquitoes or Culicidae of Jamaica. 



10. CULEX JANITOR. Theobald. 



(The False Crab-hole Mosquito.) 

 i 



(Mono. Culicid. III., p. 183, 1903.) 



General appearance. Head deep brown, with narrow-curved 

 creamy scales in the middle, darker at the sides, and very pale 

 yellow around the eyes ; palpi black-scaled. Thorax deep brown, 

 with rich umber brown narrow-curved scales, and with a slightly 

 paler curved line on each side about the middle of the 

 mesonotum (in some lights appear a median dark line, in others 

 two median parallel lines). 



Abdomen in 9 unbanded, with small basal lateral white 

 spots, venter with broad basal white bands. Fore and mid legs 

 unbanded, hind legs with narrow bands, mostly basal, but to- 

 some extent involving the apex of the preceding segment. Ungues 

 of female equal and simple ; those of the fore and mid legs of the 

 male unequal, uniserrated ; hind equal and simple. 



Male palpi brown, with a narrow pale band towards the base, 

 two apical segments equal, both slightly paler at the base, with 

 a few short hairs. Abdomen of male with three narrow pale 

 bands on the basal segments, then two large basal spots not 

 forming bands and a mass of dull grey scales on the apical 

 segment. There are also traces of banding on the mid legs of 

 the male. 



Length. 5 mm. 



Geographical distribution. Jamaica, along coast line. 



Life-history and habits. Nothing is yet known of the larval 

 and pupal stages. The adults occur congregated at the entrance 

 of crab-holes with Deinocerites cancer by the seashore. They 

 do not fly up and attack one, and are thought by Dr. Grabham 

 to be nocturnal. 



The species much resembles C. secutor, but can be told by 

 the unbanded female abdomen and the male palpi having the 

 two apical joints much shorter and stouter than in secutor. 

 Moreover, its habits and distribution are different, the False 

 Crab-hole Mosquito being littoral, the Mountain Mosquito an 

 inland insect. 



