﻿351 



2. Ephemerella ignita Poda. A large series, includinsf 

 both sexes. 



3. Baetis binoculatus Liuii. A very small male. 



4. Baetis ulger Linn. A fine specimen, male. 



5. Ecdyurus corsicus n. sp. Thorax above brown, 

 on the sides with several yellow stripes and spots. Abdomen 

 dorsally light brown. Hind border of the segments blackish 

 brown. At the sides of each segment an oblique dark brown 

 streak from the black stigmata, where the streak is small, 

 to the dark hind border. The hind angles yellowish. The 

 venter yellowish, and the 1^* to 8*'' segments with a large 

 dark brown pentagonal spot, placed nearest to the hind 

 margin. 9^^ segment reddish brown. Forceps blackish brown. 

 Setæ blackish brown at the base, 



light brown with small black 

 annulations towards the apex. 

 Fore legs of male pitchy brown, 

 of female brown. The interme- 

 diate and hind legs with yellowish 

 brown femoræ, which become 

 darker at the apex (faint trace 

 of a reddish middle band), with 

 yellowish brown tibiæ and with 

 blackish tarsi. Wing hyaline; 

 the marginal areas in fore wings 

 with yellowish tinge. Costa, sub- 

 costa and radius strong dark 

 brown. The greater part of cross 

 veins between costa and subcosta 

 in the pterostigmatical region 

 anastomosing and bordered with 

 greyish black. The cross veins 

 between subcosta and radius be- 



a. 



hind the pterostigma also with 



greyish blach borders. The other ii. 



nervures and cross veins dark 



brown and plainly visible. Length c? 9 — 11mm; ? 12 mm. 



22* 



Fig. 2. 

 Forceps and penis of Rhi- 

 tlirngena Ealoni. 

 Penis of Ecdyurus corsicus. 



