﻿534 ILLUSTRATIONS. 



Plate IV. 



Fig. 1. Lateral aspect of pupa, showing ehsetotaxy and respiratory siphons. 

 1X12. 



2. Lateral aspect of respiratory siphon. 1X25. 



3. Dorsal aspect of respiratory siphon (1X25), showing opening lined with 



short, fine hairs which preclude entrance of water. 



4. Dorsal aspect of abdomen of pupa, showing second to ninth segments and 



pinnurae or caudal fins. 1X12. 



5. Pinnura or caudal fin. showing form and position of uroehseta. 1X25. 



6. Perspective of abdomen of adult female mosquito, showing ovipositor and 



chitinous sclerites which compose the ninth segment. 1X60. 



7. Perspective of abdomen of adult male mosquito, showing harpes and hairs 



together with sclerites which compose the ninth segment. 1X60. 



8. Arrangement of supernumerary and cross veins in wing of male. ( IX 150) : 



I. Supernumerary. II. Mid cross vein. III. Posterior cross vein. 



9. Arrangement of supernumerary and cross veins in female. 1X150. 



Plate V. 



Fig. 1. Adult female of Myzomyia ludloum Theob. 1XS. 

 2. Adult male of Myzomyia ludlowii Theob. 1X8. 



Plate VI. 



Fig. 1. Adult male of Myzomyia ludlowii Theob. Note position of elaspers which 

 is characteristic. This photomicrograph, as also the following, is made 

 from a balsam preparation of a specimen treated with 5 per cent potas- 

 sium hydroxide. 

 2. Adult female of same. Xote the extruded spermatheca below the ovipos- 

 itor. This organ lies normally within the eighth segment. The scu- 

 tellum appears in profile as a knob at the base of the right wing. 



Plate VII. 



Fig. 1. Eyes, antennae, palpi, and proboscis of male Myzomyia ludlowii Theob. 

 Xote the construction at the middle of the second palpal segment, rep- 

 resenting ankylosis of two segments. 



2. The same of the female, showing the lancet and other punctorial seta' 



removed from the proboscis or labium. 



3. Wing of Myzomyia ludlowii Theob., showing spots (female). 



4. Wing showing arrangement of cross veins in the female. 



5. Three ultimate abdominal segments of female showing spermatheca in 



position. 



6. Eighth abdominal segment showing circi-like ovipositor with squamation. 



Plate VIII. 



Fig. 1. Ungues of forefoot of male. 



2. Ungues of forefoot of female. 



3. Ungues of middle foot of male. 



4. Ungues of middle foot of female. 



5. Ungues of hind-foot of male. 



6. Ungues of hind-foot of female. 



