7. 



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34 



Hind legs and tarsi of Aedes females, anterior view. 

 Fig. 26. — A. grossbecki. hind leg. 

 Fig. 27. — A. slicticus, hind leg {posterior view of femur shown 

 beneath > 



Fig. 28. — A. Iriseriatus. hind leg. 



Fig. 29. — A. rexans, hind leg. 



Fig. 30. — A. aegypti, middle leg. 



Fig. 31. — A. aegypti, hind leg. 



Fig. 32. — A. sollicitaiis, hind leg. 



Fig. 33. — A. mitchellae. hind tarsus. 



Fig. 34. — A. dorsalis. hind tibia and tarsus. 



Fig. 35. — Aedes atrupalpus, base of wing. Abbreviation; C, 

 costa or costal vein. 



Fig. 36. — Aedes excrucians. tarsal claw of female. (After Barr 

 1958.; 

 Fig. 37. — Aedes filchi. tarsal claw of female. (After Barr 1958.) 

 Fig. 38. — Aedes Iriseriatus. scales on pronotal lobe, lateral aspect. 

 Fig. 39. — Aedes thibaulti. scales on pronotal lobe, lateral aspect. 



9. 



10. 



11. 



12. 



13. 



14. 



All wing scales dark; first segment of hind tarsus 

 black but with a single basal white band (Fig. 33). 

 A woodland species of the southern states, twice 

 found in Illinois in the Chicago area. . .mitchellae 



Some wing scales black, some white, giving the wing 

 a spotted appearance; first segment of hind tarsus 

 frequently with a middle light band in addition 

 to basal white band (Fig. 32) 8 



Abdomen with extensive dorsal areas of cream or 

 tawny scales and small lateral areas of white scales, 

 the two colors definitely contrasting; first segment 

 of hind tarsus with a yellow middle band. An 

 eastern species locally abundant in Illinois, associ- 

 ated with sulfureted wastes sollicitans 



Abdomen with extensive dorsal areas as well as 

 small lateral areas of white scales; first segment of 

 hind tarsus with a white middle band or no middle 

 band. A western prairie-savanna species recorded 

 from Savanna, Illinois nigromaculis 



Mesonotum black but with lyre-shaped silver lines 

 (Fig. 43). A nonresident, domestic, tropical ad- 

 ventive that is found occasionally in southern 

 Illinois aegypti 



Mesonotum (Fig. 44-58) not as in Fig. 43, never 

 with lyre-shaped silver lines but often with wider 

 light stripes 10 



White tarsal rings narrow (Fig. 29). A Holarctic 

 species common throughout Illinois vexans 



White tarsal rings (Fig. 26) wider than in Fig. 

 29 11 



All veins of wings with rows of very wide scales 

 (Fig. 40); mesonotum (Fig. 44) with a large 

 central black spot enlarged posteriorly. An east- 

 ern and south-central woodland species local in 

 the southern half of Illinois grossbecki 



Some veins with rows of only long narrow scales 

 ( Fig. 41 ) ; mesonotum marked other than as shown 

 in Fig. 44 12 



Abdomen entirely covered with yellowish scales, 

 without banding; most of scales of costa white; 

 mesonotum entirely yellowish golden brown. A 

 Holarctic species that is rare in open areas of 

 extreme northern Illinois flavescens 



Abdomen either with decided banding or with 

 patches of dark scales; majority of scales of costa 

 dark; mesonotum with a pattern of gray, purplish, 

 or reddish brown 13 



Abdomen with a central stripe of pale scales, as in 

 Fig. 48. Variants of nigromaculis 



Abdomen without a central stripe of pale scales. .14 



Tarsal claws of front and middle legs with each 

 inner tooth long and each outer tooth bent abrupt- 

 ly over it (Fig. 36). A Holarctic species that is 

 common locally in northern Illinois. Typical 

 form of excrucians 



Tarsal claws of front and middle legs with each 

 inner tooth shorter than that in Fig. 36 and each 

 outer tooth less abruptly bent (Fig. 37) 13 



