60 Mr. Kenneth J. Morton on 



seems to refer to the species now generally known as 

 Capnia nigra, I retain the old name for that species.. 



Gapnia affinis, n. sp. 



Very closely allied to C. atra, and of about the same 

 size, but as far as can be judged from the examples, 

 which are carded, more brownish in colour of the head 

 and thorax, and with wings more greyish and paler 

 neuration. 



The genitalia are also on the same plan as in C. atra, 

 but difi'er in the following details : the barbed part of 

 the side pieces is placed dorsally, so that it is distinctly 

 visible when viewed from the side, and the slender curved 

 process beneath these pieces terminates simply without 

 projection or tooth. 



Thi-ee males and a number of females from Blagowik, 

 Amurland (22nd April), received from Mr. McLachlan. 

 This insect may only be a race or condition of G. atra', 

 but it appears sufficiently well marked to deserve a 

 special name. 



Gapnia nigra, Pictet. 



G. nigra, Pictet, Perlides, p. 321, pi. xxxix (in part) 

 and pi. i. (?). G. nigra, Brauer and Low, Neur. 

 austr., p. 30 (1857). 



Ghloroperla hifrons, Newman, Ent. Mag., vol. v., p. 401 

 (1838), and Mag. Nat. Hist., n. s., vol. iii., p. 89. 



For the sake of comparison with the species of the 

 atra group, a few figures and notes relating to this 

 species are given. The number of nervules between the 

 costa and sub-costa of forewings is irregular ; one only 

 is shown in figure 4, but there may be as many as three 

 about the middle of the wing. 



Only limited materials for this species have been 

 examined. It is a common species in the Clyde district 

 in early spring (March and April). Brauer's Austrian 

 types in McLachlan's collection do not seem to differ 

 from British examples, and I have seen similar examples 

 from Bohemia (Klapalek). Examples from Turkestan 

 difier so little in the structure of the 6 genitalia, that at 



