PUPAL STAGES OF WEST AFRICAN CL'LICID^. IT 



5. Spines run one-sixtli of the length of the siphon 0. 



Spines run one-quarter of the length of the siphon. CuJex aquilus, Graham, p. 43. 



6. Siphon ten times as long- as its base ; the longer papillae half as loug [p. 48. 



again as the anal segment PectinojyalpKS fuscits, Theo. P (I), 



Siphon about eight times as long as its base; the longer papillae 



slightly shorter than the anal segment Culex nif/rocostah's, Theo.^ p. 39. 



7. Siphon four times as long as its base, with spines for one-third of its 



length ', papillae unequal and longer than the anal segment, ventral 



pair longer than the dorsal Ctde.v quasuielidus, Theo.*, p. 38. 



(PI. VII, fig. 7.) 



Siphon four times as long as its base, spines absent or vestigial, papillae 



equal and about as loug as the anal segment, the surface of which is [p. 47.. 



roughened Megaculex 2>incerna, Graham *, 



(PL II, fig. 7.) 



Siphon more than six times as long as its base, with spines for one-third 

 of its length ; papillae unequal, the dorsal pair longer than the ventral 

 and about equal to the anal segment Culex lividocostulis, Graham, p. 4o.. 



8. Antennae with plume, hairs plumose 9. 



Antennae with plume, hairs simple 14. 



Antennae without plume 17. 



9. Hairs on end of antennae branched 12. 



Hairs on end of antennae simple, not branched 10. 



10. With an extra joint on the end of the antennae ; spines on siphon absent 



or vestigial Megacidex ])incerna, Graham, p. 47. 



Without such a joint ; spines developed 11. 



11. Siphon with plumes of plumose hairs on the ventral side ; characteristic 



plume on head near antenna Cidex quasigelidus, Theo., p. 38. 



Siphon with plumes of simple hairs on the ventral side ; plume on head [p. 32. 



simple CuUciomyiafreetoumensis, Theo., 



12. Siphon quite four times as long as its base 13. 



Siphon not quite four times as long as its base ; papillae unequal, 



double as long as anal segment, dorsal pair one-third longer than the 



ventral Oulex albovirgatus, Graham, p. 4L 



13. Siphon more than four times as long as its base ; two rows of scales 



on the comb ; papillae only slightly unequal; the longer nearly twice 



as long as the anal segment Culex duttoni, Theo., p. 34. 



(PI. V, fig. 2.) 



Siphon four times as long as its base ; three rows of scales on the 



comb ; dorsal pair of papillae are nearly double tlie ventral which are 



nearly equal to the anal segment Cidcx dissimilh, Theo., p. 40. 



(PI. Ill, fig. 17.) 



14. Anal papilUe short 16. 



Anal papillae long and tapering, at least 2^-3 times as long as the 



anal segment 1.5, 



1-"). Anal papill.T nearly equal in length , Cidex ccdiginosus, Graham, p. 44, 



Anal papillae very unequal in length ^dimorjihusdomesticus^hQO.jT^.-M. 



* These two species appear again under 8. 

 BULL. ENT. PxES. VOL. 1. PART I. APRIL I9IO. 



