EXPLANATION OF PLATE V. 



1. One of a pair of ciliated structures in the pharynx of the larva of Culex dissimills, 



Theo. The '^ weel " or '' lobster-pot " arrangement of Professor Miall. 



2. Siphon of the larva of Culex duitoni, Theo. ; lateral view, ventral side on the left. 



3. Antenna of the same larva. 



4. Pupa of C. duttoni, lateral view. 



o. Antenna of the larva of Cidiciomyia ci?ierea, Theo. 



6. Siphon of t)ie same larva ; lateral view, with the ventral side on the right. 



7. Pupa of Culiciomyia cinerea, lateral view. 



8. One of the anal plates of the same pupa, to show the characteristic shape. 



9. Siphon of the larva of Stegomyia aincoaryentea^ Theo. ; lateral view, the ventral 



side on the left. 



10. One of the spines on the same siphon. 



11. Dorsal view of the scales of the comb of the larva of 8. (iincoaryentea. 



12. Lateral A'iew of the same scales, both diagrammatic. 



13. Pupa of -S'. apicoargentea^ lateral view. 



14. Last two segments and anal plates of the same pupa ; dorsal view. 



15. Siphon of the larva of 3Iyxosquainus paludosus, Graham ; lateral view, the ventral 



side on the riglit. 

 1(3. Antenna of the same larva. 



17. Pupa of Myiosqiiamus jHiludosus, lateral view. 



18. Last two segments and anal plates of the same pupa. 



19. The eeventh, eighth and anal abdominal segments of the larva of Pyretoi^horns 



costalis, Lw., to show the arrangement of these parts in the Anopheline larvae, as 

 they are seen from the dorsal view: — a, spiracles; b, anal segment; c, papillae ; 

 (/, respiratory trachea. 



20. The sauje parts of the same larva, seen from the lateral view ; the letters are the 



same, but e denotes the comb. 



21. Modification of the palmate hair, seen on the first segment of the abdomen of the 



mature lar\ a of P. costalis. 



22. Palmate hair from the dorsum of the larva of P. costalis. 



23. Pigment marks and central spot seen on lie dorsal siile of the abdominal segments 



of the mature larva of P. costalis. 



