Ephemeridse//wtt Tropical Africa. 



27o 



Adult ? (dried). — Wings white ; the stronger veins and 

 cross-veins whity-brown ; but the faint traces of finer obso- 

 lescent neuration between the strong veins subopaque white. 

 Epinotal subulate continuations decurrent from the fore 

 wing, defective, but also white. Cross-veinlets in the mar- 

 ginal area straight and simple, about 27 in number; 9 below 

 R l and 10 within the sectorial fork. Thorax largely eaten 

 out by cabinet-pests ; mesonotum brown ochreous, intersected 

 lengthwise by a fine median black suture ; scutum edged at 

 the sides with whitish; this edging, opposite the fore wings, 

 widened and joined together across the dorsum by a narrow, 



Elassoneuria Candida, sp. n. 

 Neuration of wings, with obsolescent interneural reticulation. 



snbtransverse, slightly retiring whitish band ; prescutum, on 

 each side of the front margin of the segment, flanked by a 

 whitish spot or streak. Abdomen before oviposition dull 

 green, owing to the eggs, but afterwards light drab-colour, 

 with a narrow, black-bordered, medio-dorsal sepia-grey stripe 

 from the second segment to the tip of the penultimate. 

 Ventrally the nerve-ganglia and the nerve-chords for nearly 

 half their length in front of each ganglion are black. Caudal 

 setas defective, Roman-sepia, with blackish joinings ; the 

 joints very short. 



Length of wing about 21 mm. 



Hab. Ilesha, S. Nigeria {L. E. B. Humfrey, 1911), 

 no. 57. 



Preparation of wings in Ca. balsam; Etn. 



POLYMITARCYS, Etn. (1868). 

 Through misunderstanding a conversation with Dr. E. Joly 



