Genus Culex. 



397 



Culex secutor. Theobald (1901). 

 Mono. Culicid. II., p. 321 (1901) ; Mosq. Jamaica, p. 22 (1905). 



Geographical distribution. — So far only recorded from Jamaica. 

 It is an inland species, and is recorded from Cinchona and Mavis 

 Bank, between 3,500 and 5,000 feet altitude; a few stray 

 specimens have been taken by Dr. Grabham in the Red Hills 

 and in Kingston. 



Life-history and habits. — This inland species appears in great 

 numbers at certain times, especially after heavy autumnal rains. 

 Great numbers bred in the pools at the foot of the Red Hills 

 near Kingston in the autumn of 1899. The adults have a slow 



Fig. 166. 



Larval characters of Culex secutor. Theobald. 



a, Labial plate ; b, antenna ; c, siphon and anal segments 



d, scale from siphon comb ; e, scales on 8th segment. 



(After Grabham.) 



and clumsy flight and appear in clouds following one about. 

 The following is Dr. Grabham's description of the adult larva : — 



" Respiratory siphon many times longer than broad ; double 

 row of pecten consisting of twelve, four- to five-toothed spines, 

 six to eight small hair-tufts at the upper posterior aspect of the 

 tube. 



" Lateral comb of simple short spines forty to sixty in number, 

 arranged in a triangular patch ; a large nine-branched tufted 

 hair at the foot of the siphon behind. Chitinous collar completely 

 encircling the ninth segment, saddle shaped ; ventral tufts of 

 hairs spring from a narrow prolongation backwards of the collar. 

 Anal papillae three-fourths the length of longest ventral hairs, 

 lanceolate, blunt at free ends. Dorsal tuft of six hairs, two of 



