Ephemeridae from South Africa. 185 



ish white. Setae white with darker annulations at the joints. Legs 

 white with a yellowish brown tinge. Wings hyaline with a yellowish 

 tinge in the marginal area. Longitudinal nervures yellowish brown ; 

 subcosta and radius mostly yellow. Cross-veins few in number, 

 placed as in the typical Cloeon-wmg, and only visible when the wing 

 is held up to the light. The number of cross-veins in the pterostig- 

 matical area is not visible owing to the forewings being compressed 

 together. In the forelegs the tibia is longer than the femur and of 

 the same length as all the tarsal joints together. 1st tarsal joint as 

 long as the three others ; the 2nd almost as long as the 3rd and the 

 4th together, and the 3rd is 1 longer than the 4th. 



FIG. 8. Forceps of Cloeon africninini. 3. 



Length of body, 4' 5 mm. ; wing, 5 mm. ; setae, about 10 mm. 



One specimen, male, was captured at M'fongosi, Zululand, 

 September, 1911, by W. E. Jones. 



The species has much likeness to a small male of Cloeon dipterum, 

 but it differs in the shape of the forceps and by its blackish red eyes 

 (dried). In Trans. Ent. Soc., Lond., 1871, p. 103, A. E. Eaton 

 mentions a female specimen of a species of Cloeon from Knysna, 

 very closely allied to Cloeon dipterum. 



GEN. ECDYUEUS, Eat. 



ECDYURUS PEBINGUEYI, Sp. 11OV. 



Imago. $ Pro-, meso-, and metathorax light brown. Abdomen 

 dorsally reddish brown, with the hind border of the segments a little 

 darker, ventral surface yellow with exception of the last segment, 

 which is reddish yellow. Forceps yellow. Femora light brown, tibiae 

 and tarsi yellow, the last named with darker joints and with blackish 

 claws. Setae brownish yellow with small brown annulations at the 

 joints. Wings vitreous with a very faint yellowish tinge in the 

 marginal area of forewing, which is mostly due to the yellow 



