Palearctic Nemoure. 565 
viewed, do not show the distinct hook-like form of the two pre- 
ceding species ; seen from above, their chitinous part is somewhat 
bifid, the furcation filled out with membrane ; viewed from the side, 
their base is broad and rounded, from which they taper in a nearly 
straight direction to the apex, where they again have a broader 
aspect, the upper and more chitinous part of the apex being 
slightly turned outwards, and the lower membranous part produced 
downwards ; from beneath, the appendages are straighter than in 
the two foregoing species, the apex being scarcely curved, but 
turned out at nearly right angles, and terminating in a sub-acute 
point. Exp., ¢,13-17mm; ¢?, 183-223 mm. 
Apparently a very common Swiss insect ; received in 
great quantity from Dr. Ris, taken on the Ziirichberg in 
April and May, and varying much in size and colour. 
What I consider the same insect is present in great 
numbers and variety in Mr. McLachlan’s collection from 
various Swiss localities, including the Hngadine, Hash- 
thal, etc. (McL.); also from Savoy, Chamounix (MclL.), 
Schwarzwald, the Vosges (Mch.), and Carinthia (Zeller). 
1 have also received it from Bohemia (Klapalek). 
An insect easy to distinguish in the $ sex; the ? 
might easily be confused with some of its alles, especially 
N. avicularis. The prothorax in the latter is, perhaps, 
relatively broader, the borders less definite, and the 
margins more rounded; but in the dry insects these 
characters could hardly be relied on with confidence. 
Some of the large ?s from the Alps of Switzerland and 
Savoy look very different from the normal ? ; they have 
an almost square pronotum, are greyer than usual, and 
have the veins more clouded. ‘These deserve attention. 
This species seems to agree pretty well with Pictet’s 
description of N. lateralis. I accept the opinion now 
generally adopted, that Pictet’s N. nitida is the ? of the 
same species. 
Nemoura dubitans, n. sp. 
Dark brown or black, shining, antennze dark brown. Pronotum 
broad, with distinct, usually pale, somewhat rounded margins. 
Legs brownish, femora darker above, as are also the apices of the 
tibiee and the two distal joints of the tarsi. Wings transparent, 
of uniformly brown tint with darker pterostigma ; neuration not 
very strong. The ¢ is easily distinguished from all others nearly 
allied by the genital parts. The ventral plate has the lobe thereon 
