LIST OF ILLUSTRATIONS. 



Plate I. 



Fig. 1. Egg of Worcesteria grata Banks. 

 [a] Showing granular nature. 

 ( h ) Showing difference in size of granules. 

 ( c ) Showing structure of single granule. 

 {d) Showing manner of rupture of shell upon hatching of larva. 



2. Full-grown larva of same. 



3. Eighth and ninth abdominal segments of larva showing setfe and respira- 



tory siphon. 



4. Pupa of W. grata Banks, showing pinnura enlarged at {a). 



Plate II. 

 Adult male of W. grata Banks. 



Plate III. 

 Adult female of same. 



Plate IV. 



Fig. 1. Egg of Desvoidya joloensis Ludlow showing reticulation and air cell 

 pattern. 



2. Full-grown larva of same. 



3. Eighth and ninth abdominal segments of larva showing setfe and respira- 



tory siphon. 



4. Pinnura of pupa showing urochaeta curved at base. 



Plate V. 



Adult male of Stegomyia persistans Banks. 



Plate VI. 

 Adult female of same. 



Plate VII. 



Fig. 1. Egg of Stegomyia samarensis. 



2. Larva of same. 



3. Eighth and ninth abdominal segments of larva showing setae and respira- 



tory siphon. 



Plate VIII. 



Fig. 1. Egg raft of Culex fatigans Wied. 



2. Single eggs showing cap at base, reticulation of shell, mode of floating on 



water and appearance after larva has emerged. 



3. Full-grown larva of same. 



4. Position of larva at surface of water. 



5. Eighth and ninth abdominal segments of larva showing setae and respira- 



tory siphon. 



6. Pupa of C. fatigans in natural position. 



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