20 ENTOMOLOGICAL SOCIETY 



smooth. Comb of 13 obliquely erect, thorn-shaped scales in a straight 

 row. Air tube three times as long as wide, conic; several two-haired 

 tufts below; no pecten. Anal segment with dorsal plate with heavy 

 chitinous basal band ; dorsal tuft, lateral and subventral hairs ; no 

 ventral brush. Anal gills with the lower two sac-like, the upper two 

 minute. 



Sabethoides undosus Coq. (PI. IV, fig. 16). 



Head rounded, narrowed before, widest at posterior angles, a black 

 bar on back of head just behind angle; antennae short, not exceeding 

 the mouth brush. Hairs moderate, diminishing posteriorly, the short 

 hairs large stellate tufts very coarse and black. Pecten of six large 

 remote thorn-shaped teeth in a line. Air tube flared at base, then 

 straight and even, very long; a few fine hair tufts especially along the 

 ventral edge; no pecten. Anal segment plated, with dorsal and sub- 

 dorsal tufts on the plate; two subventral tufts joined by a chitinous 

 band, all of long hairs. Anal gills four, rather long, tapered abruptly 

 on distal half. 



Trichoprosopon nivipes Theob. (PL IV, fig. 18). 



Head rounded, broader than long; eye very small, rounded, black; 

 antennae very small, scarcely as long as the mouth brush. Body long, 

 equal, the hairs moderate, multiple, diminishing posteriorly ; eighth seg 

 ment without a lateral comb but a single stout seta arising from a large 

 tubercle. Air tube very small, about half as long as the width of the 

 body, straightly tapered, twice as long as wide; no pecten; a stout 

 tuft at middle and slight hairs on dorsal aspect. Anal segment short 

 with a dorsal plate narrowed laterally, squarely terminated; dorsal 

 hairs stout and long; a hair at lateral margin of plate; two sub- 

 ventral tufts joined by a curved chitinous band; no ventral brush. 

 Anal gills four, large and swollen, bluntly rounded, sack-like, rather 

 opaque, spotted. 



EXPLANATION OF PLATES. 



Fig. i. Aedes busckii Coq. 



2. Aedes mediovittata Coq. 



3. Grabhamia scholasticus Theob. 



4. Grabhamia infine D. & K. 



5. Grabhamia pygm<rus Theob. 



6. Culex daumasturus D. & K. 



7. Culex inhibit at or D. & K. 



8. Culex lamentator D. & K. 



9. Wyeomyia durhami Theob. 



10. Aedes laternaria Coq. 



11. Aedes philosophicus D. & K. 



12. Aedes cyaneus Fab. 



