EXPLANATION OF PLATE I. 



Fig. 1. Antenna of larva of Ctile.v albovm/atus, Graham. 



2. One of the plumes on the face of the same larva to show the plumose character of 



the hairs. 



3. Small stellate hair, from the thorax of the same larva ; unusually bushy and strong ; 



the majority of small stellate hairs are like those figured on the abdomen of 

 Culex guiarti, Blanch. (PI. VII, fig. 4). 



4. Seven+h, eighth and anal segments of the same larva ; lateral view (right side), 



showing the characters on the posterior portion of the larva. 

 a. Siphon or respiratory tube. 

 h. Anal segment. 



c. Spines of the siphon, the " pectens " of Felt. 



d. Comb. 



e. Siphonal plume. 



/. Sub-siphonal plume. 

 g. Anal plume. 



h. Hairs on dorsal edge of anal segment. 

 {. Ventral beard of anal segment. 

 k. Papillae, or anal papillae. 

 m. Eighth segment. 



5. Pupa of Culex alhovirgatus, Graham ; lateral view, with the animal lying on its 



side in the trough. 



a. Trumpets or respiratory trumpets. 



h. Anal plates or fins. 



c. Seventh segment bearing plumes. 



6. Portions of the seventh segment and an anal plate of the same pupa, more magnified, 



to show the plume of branched hairs : ventral view. 



7. The anal segment and surrounding parts of larva of Culex imllatus, Graham ; 



lateral view (left side), and more highly magnified than fig. 4 ; only a small portion 

 of the siphon (which is very long) is shown. 



8. Pupa of CuJex pullafus, Graham ; lateral view. 



9. Portion of seventh segment of the same pupa, seen dorsally, to show the small 



plume of plumose hairs. 



10. Siphon of the larva of Cidieiomyia /"r^-i^^o^y^ews/s, Theo,, lateral view ; the ventral 



side is on the right. 



11. Pupa of Culiciomyia freetownensis , Theo., lateral view. 



12. The same pupa seen from the dorsal side with the head bent quite under; the 



sockets of the frontal setae give an idea of the angle at which the animal is seen. 

 To show the renl distribution of the plumes and hairs, compared with the 

 appearance seen through the microscope from a lateral view. 

 1-3. Siphon of the larva of Culex aquiluSy Graham ; half lateral view, showing both 

 rows of spines. 



14. Comb of the same larva, magnified about 60 diameters. 



15. Antenna of the larva of vEdimorpJms punctothoracis, Theo. 



16. Siphon of the same larva, half lateral view. 



1 7. Pupa of ^. punctothoracifij lateral view. 



18. Portion of the seventh segment of the same pupa, to show the small plume of 



simple hairs. 

 J9. Comb of the larva of TJranotcenia balfouri, Theo,, as seen with low powers, 



