﻿ILLUSTRATIONS. 



Map of Olongapo, Zambales, showing United States naval station and surrounding 

 region with breeding places where Myzomyia ludlowii Theob., was 

 actually found, indicated by red cross lines. 



Plate I. 



Fir,. 1. Egg of Myzomyia ludlowii Theob., top view, showing micropyles. 1X25. 



2. Egg of Myzomyia ludlowii Theob., side view, showing large and small air- 



chambers. 1X25. 



3. Full grown larva of M. ludlowii Theob. 1X10. 



4. Respiratory aperture of siphonette of larva, showing vitelline tubercle in 



center of upper ray with the corresponding socket near middle of star 

 and tracheal openings in upper part on each side. 1X40. 



5. Right mandible of larva, showing dentation and auxiliary bristles and 



palpuli. 1X240. 

 C. Eighth and ninth abdominal segments of larva, showing (A) anchor 



bristles, (B) respiratory siphonette, (C) lateral comb, (D) tubercle for 



propelling setae, (E) anal gills, and (F) propelling sets. 

 7. Quadrifurcate seta from comb, the type of numerous setae distributed over 



various parts of the body of the larva. 1X240. 



Plate II. 



Fig. 1. Head of full grown larva, showing ehsetotaxy and markings. 1X00. 



2. Labium of larva, with base of clypeus. 1X400. 



3. Maxilla of larva, showing external, multiple seta and palpus. 1X400. 



4. Ventral and lateral aspects of the labial plate of larva, the lateral aspect 



showing its double laminate structure. 1X400. 



5. Dorsal ehitinous sclerite of ninth abdominal segment of larva, showing 



paired anchor setae (the outer ones) and propulsory setae. 1X400. 

 G. Lateral comb from eighth abdominal segment of larva with ehitinous 

 brace and part of quadrifurcate seta. 1X400. 



Plate III. 



Fir,. 1. Head and thorax of larva in penultimate stage showing great width of 

 colored, basal band on head. IX (i0. 



2. Dorsal aspect of thorax of full grown larva, showing ehsetotaxy. 1X00. 



3. Ventral view of thorax, showing pseudopoda and ehaetotaxy. 1X00. 



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