Plate XXI 



Striicl ura] Dchiils of Ccrdlopofjouivd' 



Fi<i'. 1. Forcip<>}}nii(i cHipfs, hypc)py>;-iuni, one side. 



Fiji'. 12. Forvipom\iui durca, hypo])ygiuni, one side. 



Fig. :>. Forcipomiiid sq}i(imipes, hypoi)ygiuin, one side. 



Fig. 4. Forciponiyid cnipes, hind tibia of female. 



Fig. f). Forvipoinijid pergdiidi u apical fonr antennal joints of male 

 (denuded). 



Fig. G. Forcipomyid cilipes, apieal four antennal joints of male 

 (denuded). 



Fig. 7. Forciponiifid dun (t, aj/ical foni' antennal joints of male (de- 

 nuded). 



Fig. 8. Forcipomyid spiciddris^ apieal four antennal joints of male 

 (denuded). 



Fig. 9. Pseudoculicoides major, hypoi)ygium, one side. 



Fig. 10. P.seudoculicoides joliannsem, hy])0])ygium. one side. 



Fig. 11. Forcipomyid cilipes, three basal flagellar joints of male 

 (denuded). 



Fig. 12. Forcipomyid sijccuhiris, seeond and thii'd llagellar joints of 

 same. 



P^ig. I'A. Forcipomyid sp( cdJaris, same joints of female. 



Fig. 14. Ceratopogon levis, second flagellar joint of male. 



Fig. If). Cerdfopof/on levis, apieal flagellar joint of male. 



Fig. 1(). Pidpomifid illinoensis, respiratory organ of ])ui)a. 



Fig. 17. Pseudoculicoides cmc.tns, hypopygium, one side. 



Fig. IS. Cerdfopogon fusculus, hypopygium, one side. 



Fig. 19. Cerdtopogon levis, hyi)opygium, one siele. 



Fig. 20. Cerdfopogon fiisinervis, hy])0])ygium, one side. 



