204 Transactions. 
KEY TO THE GENERA OF LEPTOPERLIDAE FOUND IN NEW ZEALAND AND THE 
UCKLAND ISLANDS. 
Radial sector in both wings forked; hindwing with the fusion 
1 | en Mg+4 and Cu, incomplete .. e m 
Radial sector in both wings simple ; hindwing with the fusion 
etween Mg+4 and Cu, complete y 2 M 3 
2 ( Fork of Rs long and well developed т is .. Aegaleptoperla n. g. 
l Fork of Rs short, terminal E Zelandobius Till. 
4 f Forewing distinctly longer than hind 
1 Forewing shorter than the hind .. 
3 .. Aucklandobius End. 
! No pterostigmatic veinlets in either wing; forewing without 
4 
cross-veins below the distal portion of Cu “+ ө 
A set of pterostigmatic veinlets present in both wings; forewin 
L ith cross-veins descending from the whole length of Cu,  Zelandoperla n. g. 
Nesoperla n. g. 
Of the genera given in the above key, Aucklandobius End. is confined | no 
to the Auckland Islands, and is represented by a single species, A. comple- 
mentarius End. The other three genera are found only in New Zealand. 
Genus MEGALEPTOPERLA n. g. (Fig. 3.) 
To the characters given in the above key we may add the following : 
Insects of moderate to large size, from lin. to over 2in. in expanse. 
Forewing narrow, three and a half times as long as wide; Sc lying close 
alongside R, for its whole length and forking at its tip; Cu, ending up 
about half-way between end of Cu, and apex of wing; 1A very close to 
Cu, ; only one inter-anal cross-vein connecting 1A with 2A. Both wings 
with a set of pterostigmatic veinlets present. 
Genotype.—Leptoperla grandis Hudson. 
Megaleptoperla grandis (Hudson). (Figs. 3, 4.) 
the details already given in the generic key and definition the following 
specific characters may now be added :— 
Head 3 mm. wide across the eyes, which are nearly black, but only 
about half as wide as the rest of the head. Ocelli small but prominent ; 
antennae with large bases set well forward in front of the eyes, the two 
basal segments considerably enlarged, the rest cylindrical, slightly hairy. 
ut ani yellowish-brown, the palpi rather short. 
tum 
band. Legs: Fore tibiae marked 
E dark fuscous and two of pale testaceous; hind legs with numerous soft 
airs. 
. Abdomen: In the male the last two segments are paler than the rest. 
rich brown. The appendages are strongly curved and turn upwards be i 
the tenth tergite; viewed laterally their ends are flattened and well 
rounded ; viewed from behind they are close together at their bases, but | 
diverge apically, their tips appearing sharply pointed; the small copulatory —— - 
