528 MOSQUITOES OF NORTH AMERICA 



5. Abdomen with green metallic reflection viresoens Dyar & Knab (p. 541) 



Abdomen with blue metallic reflection howardii CoqulUett (p. 644) 



6. Claws of the female toothed 7 



Claws of the female simple 16 



7. Hind legs with raised scales (as long or longer than the setas) 8 



Hind legs without such raised scales 13 



8. Thorax without median dark stripe 9 



Thorax dark scaled centrally 11 



9. Abdomen with the segments below banded with blue-black at the base 10 



Abdomen with the segments below wholly yellow scaled except at tip 



sayi Dyar & Knab (p. 554) 



10. Liast two joints and tip of the third of hind tarsi white 



posticatus "Wiedemann (p. 548) 

 Last two joints only of hind tarsi white variety echinata Grabham (p. 552) 



11. Last two joints of hind tarsi white 12 



Last joint only of hind tarsi white terminalis Coquillett (p. 552) 



12. Scutellum dark scaled, no pale scales around antescutellar space 



lutzii Theobald (p. 557) 

 Scutellum yellow scaled, a short yellow line beside the antescutellar space 



chamverico Dyar & Knab (p. 563) 

 Scutellum white-scaled, antescutellar space with a broad patch of whitish 



scales on each side horridus Dyar & Knab (p. 561) 



13. Penultimate joint of hind tarsi white, the last black 14 



Last two joints of hind tarsi white; the mesonotum with black and golden 



scales mixed pazosi Pazos (p. 565) 



Last joint of the hind tarsi white mexicaniis BellardI (p. 564) 



Hind feet without white cyanescens Coquillett (p. 567) 



14. Thorax dark-scaled In the middle discrucians Walker (p. 569) 



Thorax all yellow-scaled 15 



15. Tips of mid and hind femora dusky coHini Dyar & Knab (p. 574) 



Tips of mid and hind femora white johnstonii Grabham (p. 572) 



16. First hind tarsal joint with a broader middle pale ring 17 



First hind tarsal joint with a narrower middle white ring 18 



First hind tarsal joint without a middle white ring 22 



17. Wings with the costa pale and two distinct black spots beyond the middle 



signipennis Coquillett (p. 575) 

 Wings not so marked discolor Coquillett (p. 578) 



18. Mesonotal vestiture predominatingly golden brown 19 



Mesonotal vestiture tinged with violet blue 20 



19. White ring of first hind tarsal joint less than one-third of the joint 



jamaicensis Theobald (p. 581) 

 This white ring one third or over texanum Dyar & Knab (p. 585) 



20. Pale abdominal bands powdery, interrupted medianly and irregular; darkly 



colored; the third vein with scale tufts throughout 



floridense Dyar & Knab (p. 586) 

 Pale abdominal bands extensive, broken only on the distal segments; less 



darkly colored; third vein with scale tufts mostly at base 21 



21. Abdomen extensively pale scaled, bands indistinct; third vein with broad 



scales In a basal dot; scutellum without silvery luster 



columbim Dyar & Knab (p. 590) 

 Abdomen less strongly pale-scaled posteriorly; third vein with broad scales 

 extending well outward; scales on scutellum with a silvery luster 



toltecum Dyar & Knab (p. 588) 



22. Wings with dark scales only 23 



Wings with whitish and dark scales 24 



23. Thorax dark reddish-brown with two white spots on the disk 



infine Dyar & Knab (p. 594) 

 Thorax dull brown with yellowish and white scales in diffuse patches 



cingulatus Fabricius (p. 597) 



24. Thorax dull golden scaled with brown spots and silvery mottling 



pygmaea Theobald (p. 600) 

 Thorax dull silvery scaled with faint median golden stripe 25 



25. Legs black, white speckled Jiaruspicus Dyar & Knab(p. 603) 



Legs pale, the yellowish scales predominating. . insularitis Dyar & Knab (p. 605) 



MAI.E GENITALIA. 



1. Clasp-filament mesially inflated 6 



Clasp-filament branched, distorted or simple, not mesially inflated 2 



