244 



SIR RUBBRT BOYCE — THE PREVALENCE, DISTRIBUTION AND 



number o£ serrations (figs. 5 and 6). The siphon or pecten spines (figs. 7 

 and 8) are variable in form and number;, there being in the specimen under 

 observation twelve ; immediately following these is a triple hair. The last 

 segment is very short, being almost rectangular and bears a number of 

 bifurcated hairs * (fig. 9) ; the papillae are stout, about 1^ times the length 

 of the segment and with rounded ends. 



S. F. Carter ad nat. del. 

 Characteristics of the larva of Stegomyia fasciata. 



6. Serrated spine from side of lateral comb. 



7. Pecten spine from base of siphon. 



8. Pecten spine, situated near the apex of the 

 siphon. 



9. Bifurcated hair from the ninth abdominal 

 seo'ment. 



1 . Apex of antenna. 



2. Antenna, showing the tuft, composed of 



a sing-le hair, 



3. Labial plate. 



4. Thoracic hook. 



5. Serrated spine from centre of lateral comb 



YII. On THE Life-Cycle and Larval Habits of the Stegomyia. 



Period of the Life-Cycle. 



For information on this subject we have to rely chiefly upon the evidence 

 which has been adduced by Goeldi (' Os Mosquitos no Para'). It must be 

 noted, however, that climatic conditions have a marked influence on the 



* These are not simple as stated and figured by Wesch6 (Bull. Entom. Research, April 

 1910, p. 25). 



