20 The Mosquitoes or Culicidae of Jamaica. 



air is present in some of the reticulate spaces; their colour is 

 black. Frequently they are laid in chains, about a quarter of 

 an inch or more between each egg. 



The larva differs from the typical Culex in that the air tube 

 is short and thick, the head is smaller than the thorax and 

 rounded, the antennae terminate in a bisegmented process 

 and a spine and lateral and terminal bristles. The clypeus is 

 rather pointed, anal fins four, oval, oblong, and short. They 

 remain for long periods wriggling about at the bottom of the 

 water, and then come slowly to the surface for air and soon go 

 down again. 



The pupa has rather short, trumpet-shaped siphons and broad 

 anal fins; a stellate tuft on the dorsum of the first abdominal 

 segment. 



Economic importance. Not only is the bite of this cosmopolitan 

 insect very severe and annoying, but its important role is that 

 of yellow fever carrier. It is an inefficient intermediate host 

 for the Filaria nocturna. 



GA. STEGOMYIA FASCIATA. Fabricius. 

 Yar. mosquito. Robineau-Desvoidy. 



General appearance. Very similar to the type, but the two 

 median yellow parallel thoracic lines are absent. 



Geographical distribution. Calcutta, St. Lucia, Brazil, Argen- 

 tina and Jamaica. 



This is not the Culex mosquito of Arribalzaga, which is a 

 typical fasciata. 



7. HOWARDINA WALKERI. Theobald. 



(The Wild-Pine Mosquito.) 

 (Mono. Culicid. I., p. 424, 1901, and III., p. 287, 1903.) 



General appearance. Head with a median line of silvery 

 white scales, then a dark brown, and then pale brown areas. 

 Proboscis long, deep brown. Thorax deep rich brown, with a 

 lateral broad silvery-white area and two median golden-scaled 

 lines running parallel in front and converging to form a single 

 line behind and two other lines not reaching the front of the 

 mesothorax. Abdomen deep brown, with some basal creamy 



