18 W. WESCHK THE LARVAL AND 



16. Anal papilLi? equal in length ; siphon very hairy on the ventral side. 



CuUciomyia cinerea, Theo.. p. 33. 

 (PL V, fig. 6.) 

 Papillie not equal in length ; siphon Avithout such hairs. [p. 49. 



Myxosquamus paludosm, Graham, 

 (PI. V, fig. 15.) 

 Pa])illoe unequal : spines on siphon ran for {\y of the length followed 



by a plume Scutomijia marshalli, Theo., p. 30. 



(PI. IV, fig. 16.) 



17. Papillae short, or moderate in length, less than three times the length 



of the anal segment 18. 



PapillfB veiy long and thin, more than four times as long as the anal [p. 31. 



segment ^dimorphiis pundothoracis, Theo., 



18. Siphon short and stout, less than or about 2| times as long as its base . . 20. 

 Siphon at least 3 times as long as its base 19. 



19. Face with four very thick hairs ; papillae shorter than anal segment. 



IJranotcenia balfouri, Theo., p. oO. 

 Face without such hairs ; dorsal papillae at least equal to the length 

 of the anal segment, the ventral papillae strikingly small. 



Stegomyia p)ollinctor, Graham, p. 29. 



20. Siphon of peculiar shape, with very rougli surface, and spined and 



plumed on the whole length of the ventral side. [p. 36. 



Culextigripes, Grandp., yeiv. fusca, Theo., 

 (PI. Ill, fig. 13.) 

 Siphon of nornml shape and with smooth surface 21. 



21. Abdomen dorsally studded with short triple or stellate hairs, mode- 



rately hairy Stegomyia africana, Theo. p. 27. 



' (PI. Ill, fig. 3.) 



Abdomen strikingly hairy Stegomyia afncnna,T'hQo. ^imm-iiime, 



form.' (PI. Ill, fig. 7.) 

 Abdomen without sucli hairs dorsally, or in a nmch less developed 



state 22. 



22. Siphonal spines running very diagonally .... Stegoinyia a2HCoargentea,Theo.,\^. 28. 



(PI. V, fig. 9.) 

 Siphonal spines running nearly parallel with the sides. 



Stegomyia fasciata, F., p. 25. 



23. Antennae without plume 24. 



Antennae with plume 3Iyzorhynchusmaur{tio7nis, Theo., p. 24. 



24. With small palmate hairs Pyretopliorus costaiis, Lw., p. 20. 



With very large palmate hairs Cellia pharoemis, Theo., p. 22. 



(PI. YI, fig. 10.) 



Key to the Pupje described. 



1. Trumpets longer than half the lengtli of the thorax * 2. 



Trumpets shorter than half the length of the thorax 5. 



2. Anal plates of unusual shape and having a shght serration on the edges. 



Megaculex pincerua, Graham, p. 47. 

 Anal plates of normal shape 3. 



* This is a character of which it is very diflicult to be certain in some cases — the pupj© 

 with rather long trumpets therefore appear again at 12. 



