EEV. A. E. EATON ON EECENT EPHEMEEID^ OR MAYFLIES. 327 



Plate II. 



Neuration, limbs, extei'Dal fj genitalia, and parts of caudal sette of 1. PuHm/enia (adult) 

 aud 9. Jolia (reputed adult) : — all enlarged. 



Figs. Id. P.javanica : — part of fore wing, legs (1-3) of J, with a larger view of the ungues of the 



fore tarsiis, aud two portions of a caudal seta, taken respectively from before the middle and 



towards the tip of the same, both highly magnified. 

 Figs. 1 e. P. tenera : — fore wing and two portions of a caudal seta corresponding with the above. 

 Figs. 1/. P. pajmana : — part of fore wiug, and underside view of genitalia. 

 Figs. 9. /. Rceseli : — parts of both wings, legs (1-3) of g , with enlarged views of the terminal joint of 



the fore tarsus, and likewise of the intermediate aud the hind tarsi, and underside view of a 



forceps-limb and penis. 



Plate III. 



Neuratiou, limbs, external J genitalia of 2. Oliyoiiciiria, 3. Elassoneuria, 4. Spaniojjhlebia, 

 5. Lachlaniaj 6. Homaoneuria, aud head of adult ^J Olii/oneuria : — all enlarged. 



Figs. 2 «. O. rhenana : — wiugs of ^ and of $ , legs (1-3) of (J , much enlarged ; underside view of part of 

 the extremity of ^ abdomen, showing a 3-jointed forceps-limb, the penis, and (in stippled 

 outline) the retracted stimuli ; another underside view of the penis with sperm-ducts jjartlv 

 extruded and the stimuli retracted ; extremity of a forceps-limb 4-jointed instead of 3-jointed ; 

 head of adult ci viewed from above ; the same from in front ; the same from the side. 



Figs. 2 b. 0. anomala : — wings, legs (1 and 3) of ,^ much enlarged and (1-3) of? ; side view of genitalia 

 (dried) with separate figures of a forcei)s-limb, aud of the jjcuis-lobes subtended by the forceps- 

 basis, or a laminar lobe of the 9th ventral segment. 



Fig. 3. E. Trimeniana : — wings of ?. 



Figs. 4. S. Trai/ue : — wiugs, legs (1-3) of (J , and underside view of genitalia. 



Figs. 5. L. ahnormis : — wings of $ . -L. luc'ida : — partial underside view of genitalia. 



Fig. 6. H. Salvinice : — wings of $ . 



Plate IV. 



Neuratiou, limbs, aud cj forceps of 7. Euthyplucia : — all enlarged. 



Fig. 7 a. E. Hecuba : — wings of $ . 



Fig. 7 b. Another species :• — hind wing of $ . 



Figs. 7 c. E. anceps: — defective wiugs, legs (1-3), with enlarged views of the intermediate and posterior 



tarsi; dorsal view of the extremity of the alxlomeu and forceps-limbs (seta; omitted), — all of the 



cC aud dried. 

 Fig. 7 d. Another species : — underside view of forceps. 



Plate V. 



Neuration, limbs, external 6 genitalia, aud head of adult d of 8. Campsiiru.i : — all enlarged. 



Figs. 8 a. C. albifiluni : — fore wing, fore leg of the adult ^ ; fore leg of cJ subimago ; underside view of 

 J genitalia, showing the penis-lobes in faint outline ; vertical view of the head and part of the 

 thorax. 



Fig. 8 b. Another species : — hind wing of $ . 



Figs. 8 c. C. latipmnis : — wings ; a partial underside view of (J genitalia, showing ou the right, at the base 



of the figure, part of a filiform forceps-limb, with an unciform prickle adjacent thereto, also a 



bifidly excised subgeuital plate, the penis-lobes slightly opened out but incurved, and either 



stimuli or sperm-ducts protruded with divergent points ; another partial underside view of the 



SECOND SEKIES. — ZOOLOGY, VOL. III. 4t4< 



