D?e , 1906] Dyar and Knab : Larvje, of Cuucid^. 189 



In this group the antennae are moderate or small ; the tuft is always 

 at or before the middle; the air tube is short, three times as long as 

 wide or less and carries a single tuft beyond the peeten . A few species 

 vary in having a more elongate tube and one has multiple tufts. The 

 anal segment is generally not encircled by the chitinous plate, but 

 this occurs in some species. 



Table of species. 



1. Air tube with the hair tuft within the peeten 2 



Air tube with the tuft beyond the peeten 8 



2. Anal segment ringed by the plate 3 



Anal segment with the ring broken on the ventral line 6 



3. Lateral comb of the eighth segment of few scales in a row. . ..tormentor 

 Lateral comb of the eighth segment many scales in a triangular patch. . . .4 



4. Peeten of the air tube with detached teeth outwardly bimaculatus 



Peeten of the air tube with the teeth evenly spaced 5 



5. Ring of the anal segment narrow; peeten of tube not to the middle . .janitor* 

 Ring of anal segment broad; peeten beyond middle lactator* 



6. Comb of few spines in an irregular row; tube with several tufts trichurus 

 Comb of long spines in a straight row; peeten running to apex, .walker i 

 Comb a patch of scales; tube with one hair tuft 7 



7. Peeten with detached teeth; abdominal hairs normal atropalpus 



Peeten evenly spaced; short abdominal hairs stellate busckii 



8. Peeten of the air tube with detached teeth outwardly 9 



Peeten of the air tube with evenly spaced teeth 13 



9. Air tube 4x1; comb a patch of scales three rows deep abfitchii 



Tube 3 x 1 or less; comb of few scales in an irregularly double row. ... 10 



10. Antennae enlarged basally, large, tuft rather beyond the middle aurifer 

 Antennae moderate only; tuft before the middle 11 



11. The two rows of peeten on the tube approximate behind- dorsal plate 



of anal segment a saddle only impiger 



Two rows of peeten well separated; dorsal plate over half encircling the 

 segment 12 



12. Tuft of tube before outer third; anal processes blunt syhestris 



Tuft of tube beyond outer third; anal processes pointed jnscus 



13. Comb scales few, in a single or irregularly single row 14 



Comb scales more numerous to many in a patch 20 



14. Anal segment ringed by the plate 15 



Anal segment not ringed, at least a small space along ventral line 18 



15. Anal processes moderate, normal 16 



Anal processes very long with a stout wavy central trachea dupreei 



16. Comb of six scales; peeten not reaching half of tube 17 



Comb of 12 scales; peeten reaching half of tube meridionalis 



♦Treated under Culex, q. v. 



