13. 



or the two types of scales mingled in a salt-and- 

 pepper, patternless mixture Aedes 



Mesonotum covered with a close mat of blue-black 

 scales, having bristles only around periphery; 

 postnotum with a tuft of small hairs. Sole Illinois 



representative, found in northern bogs 



Wyeomyia smith! 



Mesonotum either having scales other than blue- 

 black or having several series of erect bristles ex- 



tending above scales; postnotum without a tuft 



of hairs 14 



14. Mesonotum either having broad lateral or mesal 

 bands or areas of white or cream-colored scales 

 (Fig. 44-58), or being almost entirely covered 



with cream-colored scales (Fig. 42) 15 



Mesonotum mostly dark-scaled, at most with a scat- 

 tering of light-colored scales, or with narrow 

 weak lines of such scales 16 



Fig. 7. — Vranoiacitia sapphirina. wing. 

 Fig. 8. — AeJes vexans. wing. 

 Fig. 9. — Anopheles quadrimacutalus, mesonotum, including its 

 posterior sclerite, the mesoscutellum. 



Fig. 10. — Aedes vexans, mesonotum, including its posterior 

 sclerite, the mesoscutellum. 



Fig. 11. — Psorophora ciliala. mesonotum, including its pos- 

 terior sclerite, the mesoscutellum. 



Fig. 12. — Orthopodomyia sigiiifera, mesonotum, including its 

 posterior sclerite, the mesoscutellum. 



Fig. 13. — Psorophora ciliala, hind leg. 

 Fig. 14. — Aedes canadensis, hind leg. 



Fig. 15. — Psorophora varipes. portion of hind leg. 

 Fig. 16. — Psorophora confinnis. hind femur. 



Fig. 17. — Toxorhynchites rutilus septenlrionalis, female head. 

 Abbreviations; p, palp; pr. proboscis. 



Fig. 18. — Uranotaenia sapphirina. male head. Abbreviations: 

 p. palp; pr, proboscis. 



Fig. 19. — Aedes sollicitans, female head. Abbreviations: p, 

 palp; pr, proboscis. 



Fig. 20. — Orthopodomyia signifera. female head. Abbrevia- 

 tions: p. palp; pr. proboscis. 



Fig. 21. — Anopheles quadrimaculatus, female head. Abbrevia- 

 tions; p. palp; pr. proboscis. 



