﻿374 F. W. EDWAEDS — REVISED KEYS TO THE 



6. Antennae short, with a small tuft on the inside ... ... Theohaldia. 



Antennae long, with a large plume on the outside ... ... Ingramia. 



7. Siphon with well-developed pecten ... ... ... ... ... 8. 



Siphon with pecten absent or vestigial ... ... ... ... 9. 



8. Head small, longer than broad, and armed with strong spines 



Uranotaenia. 

 Head with the ordinary hairs ... ... Ochlerotatus, Steyomyia. 



9. Siphon normal, valves as usual ... ... ... ... Mimomyia. 



A pair of strong, forwardly directed, curved spines at tip of 



siphon ... ... ... ... ... ... ... ... 10. 



10. Valves not enlarged ; antennae much enlarged ... ... Avdomyia. 



Valves enlarged into a saw-like structure ; antennae long but not 

 much enlarged ... ... ... [Taeniorhync1ms\ Mansonioides, 



Genus Anopheles, Mg. 



1. Shaft of antenna with hair-tuft ; no plumose hairs in middle of 



thorax overlapping occiput ... ... ... mauritianus, Grp. 



Shaft of antenna without hair-tuft ; plumose hairs present in 

 middle of thorax in front ... ... ... ... ... ... 2. 



2. Rudimentary palmate hairs on thorax ... ... ... ... 3. 



Palmate hairs of thorax altogether wanting ... ... ... 6. 



3. External anterior frontal hair much branched, forming a pro- 



nounced tuft ... ... squarnosus, Theo., pharoensis, Theo. 



External anterior frontal hair simple or slightly branched ... 4. 



4. Posterior, and internal anterior frontal hairs simple funestus, Giles. 

 Posterior, and internal anterior frontal hairs branched ... ... 5. 



5. Dark brown ; filaments of palmate hairs longer ... natalensis (H. & H.). 

 Light brown ; filaments of palmate hairs shorter ... ardensis (Theo.). 



6. Median thoracic hairs overlapping occiput rudimentary maculipennis, Mg. 

 Median thoracic hairs overlapping occiput well developed ... 7. 



7. Internal anterior frontal hair branched ... ... ... ... 8. 



Internal anterior frontal hair simple ... ... ... ... 9. 



8. Palmate hair of second abdominal segment fully developed, the 



leaflets with a distinct shoulder ; filaments of all palmate hairs 



about ^ as long as the whole leaflet ... ... ... costalis, Lw. 



Leaflets of palmate hair of second abdominal segment without 

 shoulder ; filaments of all other palmate hairs under \ as long as 

 the whole leaflet ... ... ... ... ... jacobi (H. & H.). 



9. Hair at tip of antennae (between the two spines) split into two 



cinereus, Theo. 

 Hair at tip of antennae split into three ... ... ... ... 10. 



10. Palmate hair on second abdominal segment well-developed 



pretoriensis (Theo.). 

 Palmate hair on second abdominal segment rudimentary rufipes (Gough). 



The foregoing table is not given with any confidence, for, in the first place, 

 I have been unable, from want of material, to devote much study to the larvae 



