56 MOSQUITOES OF NORTH AMERICA 



8. Clasp-filament divided into three long filamentous lobes, one of which arises 



close to the base W. trinidadensis Theobald (p. 61) 



Clasp-filament slender with slender, attenuated branches, arising from the 



tip of the slenderly prolonged side-piece 



W. aporonoma Dyar & Knab (p. 74) 

 Clasp-filament of three lobes, one of which is broad and setose; side-piece 



not attenuated at tip 9 



9. Harpes crested by a tufted filament; lateral angles of the penultimate seg- 



ment strongly produced 10 



Harpes without crests; lateral angles of penultimate segment somewhat or 



not produced 11 



10. Crest of harpes a fine tuft of hairs W. codiocampa Dyar & Knab (p. 103) 



Crest of harpes a row of coarse lamellae. . W. symmacJius Dyar & Knab (p. 144) 



11. Side-piece with a lobe at base bearing long waved hair 



L. methysticus Dyar & Knab (p. 49) 

 Side-piece without such a lobe, with three long hairs 12 



12. Inner lobe of clasp-filament rounded elliptical, with a row of fine erect hairs. 13 

 Inner lobe of clasp-filament not so formed 14 



13. Outer lobe of clasp-filament crested; inner lobe of side-piece not exceeding 



ends of harpes W. bromeliarum Dyar & Knab (p. 132) 



Outer lobe of clasp-filament hooked; inner lobe of side-piece reaching the 



fW. espartana Dyar & Knab (p. 109) 

 ^P^ \W. drapetes Dyar & Knab (p. 110) 



14. Middle lobe of the clasp-filament conical pointed or furcate 15 



Middle lobe of clasp-filament broad with truncate apex 22 



15. One lateral lobe of clasp-filament slender, the other broad 16 



Both lateral lobes of clasp-filament slender or small 19 



16. Harpes broad, pointed at tip with a few setas. W. vanduzeei Dyar & Knab (p. 66) 

 Harpes slender, bent and dentate at tip 17 



17. Stem of clasp-filament short and stout. W. matcea Dyar & Knab (p. 94) 



Stem of clasp-filament long and slender 18 



18. Clasp-filament with only one broad lobe. W. chalcocephala Dyar S; Knab (p. 146) 

 Clasp-filament with two broad lobes W. galoa Dyar & Knab (p. 128) 



19. Clasp-filament with round, sucker-like disks. . W. abe'bela Dyar & Knab (p. 112) 

 Clasp-filament without such structures 20 



20. Middle lobe of clasp-filament short and broad. W. pandora Dyar & Knab (p. 88) 

 Middle lobe of clasp-filament long and conical 21 



21. Outer lobe smooth; middle lobe crested W. philophone Dyar & Knab (p. 86) 



Outer lobe with a spine; middle lobe spiny W. smithii Coquillett (p. 96) 



Outer lobe with several spines; middle lobe setose 



W. chrysomus Dyar & Kjiab (p. 71) 



22. Harpes tipped by two filaments W. abascanta Dyar & Knab (p. 79) 



Harpes simply pointed at tip 23 



23. Inner and outer lobes of clasp-filament both sharply pointed 24 



One side-lobe of clasp-filament broad or truncate 26 



24. Middle lobe of clasp-filament with thickened, lined center 



W. ablabes Dyar & Knab (p. 105) 

 Clasp-filament without this structure 25 



25. Outer lobe of clasp-filament long, flexuous, detached 



W. abrachys Dyar & Knab (p. 142) 

 Outer lobe of clasp-filament short, angled, spine-like 



W. simmsi Dyar & Knab (p. 147) 



26. The broad side-lobe elliptical or subtriangular, forming a lappet opposed to 



the broad central lobe 27 



The broad side lobe shortly truncate forming an angle on the margin of the 



broad central lobe 28 



27. Lappet-lobe of clasp-filament dentate and tubercular 



W. telestica Dyar & Knab (p. 138) 

 Lappet-lobe of clasp-filament elliptical, smooth 



fW. mitchellii Theobald (p. 82) 

 \W. antoinetta Dyar & Knab (p. 84) 



28. Clasp-filament with median and marginal rib on middle lobe 



W. scotinomus Dyar & Knab (p. 159) 

 Clasp-filament with small detached pointed lobe 



fW. chresta Dyar & Knab (p. 140) 



\W. leucopisthepus Dyar & Knab (p. 149) 



