EEV. A. E. EATON ON RECENT EPHEMERID^ OR MAYFLIES. 329 



Plate IX. 



Neuration, limbs, external d genitalia of 14. Polamanthus and 15. Rhoenanthus and head o£ adult 



(5 Potamanthus : — all enlarged. 



Figs. 14. P. luteus : — wings ; legs (1-3) of 6 and fore leg of J ; two underside views of forceps, one 

 in outline (dried) and the other shaded (freshly killed) ; two underside views of the penis, the 

 uppermost fresh, and the lower dried ; a vertical view of the adult ^J head, and a side view of 

 the same with part of the thorax and of the fore leg. 



Figs. 15. Rh. speciosus : — both wings and part of a fore wing; underside view of forceps (dried) ; under- 

 side view of the penis (dried). 



Plate X. 



Neuration, limbs, external d genitalia, and adult ,;' head of IG. Atalophlebia : — all enlarged. 



Figs. 16 a. A. annulata : — wings ; legs (1-3) of 6 with a more enlarged view of the hind tarsus ; forceps 



(dried) ; underside view of penis (dried). 

 Fig. 16 6. A. taprobanes : — oblique side view of penis (dried). 



Figs. 16c. A. australasica : — two fore wings and a hind wing; underside view of penis (dried). 

 Fig. 16 d. A. strigata : — hind wing and part of a fore wing ; fore leg of adult ? . 

 Figs. 16 e. A. nodularis: — fore wing; hind wing more enlarged; a side view and an underside view of 



penis [rather inferior to the older figures of the same] (dried). 

 Figs. 16/". A. scita : — forceps and underside view of penis (dried). 

 Figs. 16 ff. A. chi/ensis : — hind wing; legs (1-3) of d; a forcej)s-limb and two views of the penis 



(dried) . 

 Figs. 16 A. A. tabularis : — hind tarsus, intermediate tarsus, and the terminal joint of the fore tarsus of 



the adult 6 ; underside view of the forceps-basis, and a forceps-limb ; underside view of penis ; 



vertical view of adult 6 head ; side view of the same, showing the asealaphoid form of oculi 



(from a specimen preserved in spirits and glycerine). 

 Figs. 16 i. A nameless species : — wings, and a more enlarged view of the hind wing. 



Plate XI. 



Neuration and limbs of 17. LeptoiMMa and 18. Blasiurus, and external g genitaHa 



of Leptophhbia : — all enlarged. 



Figs. 17 a. L. niarginata : — wings ; legs (1-3) of 6 and fore leg of $ , with a more enlarged view of the 

 intermediate (J tarsus; underside view of the forceps-basis and the right forceps-limb, illustrating 

 the occasional 4-jointed condition of the limb ; underside view of penis (freshly killed). 



Figs. 17 6. L. mollis : — wings ; side view of forceps (dried). 



Figs. 17 c. L. prtepedita: — {uppermost fyiin') side view of penis, subtended by an erect underside view of 

 the same ; {right and left figures at the bottom of the group) underside view of forceps, and side 

 view of the same (dried) . 



Fig. 17 d. L. Meijeri: — underside view of penis (dried). 



Figs. 18. B. concinnus l — ciipidus] : — wings and legs. 



Plate XII. 



Neuration, limbs, and external 6 genitalia of 19. Ckoroterpes, and 20. Thraulus : — all enlarged. 

 Figs. 19. Ch. Picteti : — wings, with a more enlarged view of the hind wing; legs (1-3) of d , with more 

 enlarged views of the intermediate and hind tarsi, and one, on much larger scale, of the 

 extremity of the fore tarsus ; underside view of forceps, and of penis (fiom specimens m 

 fluid). 



4.i* 



