Ephemeridae from South Africa. 179 



species of Polymitarcys from South Africa, but without giving any 

 description, and on Plate vi., 106, he gives a drawing of the fore- 

 wing. This figure agrees very well with the forewing of the above 

 described species. 



GEN. HEXAGENIA, Walsh. 

 HEXAGENIA FULVA, sp. nov. 



Imago. J . Head pale yellow ; eyes, a circle round each ocellus 

 and two spots at the hind margin of head black. 1st joint of 

 antennae light brown. Prothorax, above and beneath, pale yellow 

 and with a broad yellowish brown lateral line. Meso- and meta- 

 thorax yellowish brown ; abdomen slightly paler, dorsally with a 

 short curved blackish brown streak on the first six segments, 

 extending from the middle of the lateral margin to the hind margin 

 of each segment. Besides these short streaks there is on each side 

 of the lst-7th segments a comma-shaped blackish brown streak, the 

 fore tip of which is broadest and touches the fore margin ; the hind 

 tip is curved inwards and does not touch the hind margin. On the 

 dorsal surface of the 8th segment are found two dark brown longi- 

 tudinal lines at each side and one along the front border ; on the 9th 

 segment one dark brown, and on the 10th two small lunate dark 

 brown spots. Abdomen ventrally pale brown with the front angles 

 of the segments blackish. Forelegs reddish brown, intermediate 

 and hindlegs paler. Wings hyaline. Longitudinal nervures with 

 the exception of the subcosta yellowish brown ; the subcosta and 

 the cross-veins blackish brown. Wing-roots yellowish. The marginal 

 area of forewing yellowish brown. 



Length of body, 22 mm. ; forewing, 20 mm. 



One example, 5 . The specimen has lost its setae. It was 

 captured at M'fongosi, Zululand, December, 1911, by W. E. Jones. 

 The species much resembles Hexagenia limbata, Pict., from North 

 America, and it is the first species of the genus recorded from Africa. 



GEN. ATALOPHLEBIA, Eat. 

 ATALOPHLEBIA TABULAKIS, Eaton. 



Atalophlebia tabularis, Eaton, Trans. Linn. Soc., Lond., 1888, 

 p. 91, pi. x., I6h. 



This South African species was not represented in the Collection. 

 The only known example was found in 1874, floating on the 

 streamlet at the Platteklip, Table Mountain, Cape of Good Hope. 

 But amongst the material is a specimen, gummed on paper and 



