TILLYARD.—Stone-flies of New Zealand. 207 
markings is always more or less marked. The specimen figured had three 
extra costal veinlets besides the humeral on the left forewing, but only two 
on the right. The pterostigmatic region is shaded and stands out quite 
conspicuously. The cerci, not mentioned by Hare, are short—only about 
1 
. long. 
Type in Mr. Hare’s collection. 
Locality —Karori, Wellington. I have also seen a series taken by 
Mr. H. Hamilton on Mount Hector, 16th February, 1921. 
Zelandobius hudsoni (Hare). (Fig. 6.) 
Leptoperla hudsoni Hare, Trans. N .Z., Inst., vol. 42, p. 30, 1910. 
Fig. 6 shows both wings of this species, the forewing of which is about 
8mm. long.* The costal margin of the forewing is straight, not curved 
as in Z. confusus (Hare), and there are no extra costal veinlets beyond the 
humeral. The distal cross-veins are placed quite irregularly, and are very 
distinct, each one being separately outlined with fuscous. There is a com- 
plete series of cross-veins below Cu, in forewing, right to its tip. The cerci 
are as long as the abdomen. | 
Type in Мг. Hare’s collection. 
Locality.—Karori, Wellington. I have never taken this species, which 
can be at once distinguished from all other species of the genus by its 
much longer cerci. 
Zelandobius furcillatus n. sp. (Fig. 7.) 
female shorter. Terminal fork of Rs in both wings exceedingly short, arising 
beyond the level of the end of R,, or, much more rarely, directly under 
the end of R,. Intercubital series of cross-veins not continued beneath 
the whole or greater part of the length of Cu, in forewing, but ending up 
either at end of Cu, or a little beyond it. Costal space of forewing with 
Fic. 7.—Forewing of Zelandobius furcillatus n. sp. 
a small extra veinlet besides the humeral; this veinlet placed well distad 
along Sc. Cerci very short, about 0-3 mm. long, with only five or six 
seoments. Male with short upturned appendages. Female with subgenital 
plate strongly bilobed. Forewing of male 7 mm., of female 8-5 mm. long. 
Types.—Holotype male and allotype female in Cawthron Institute 
collection (Tarawera ; male 16th November. female 15th November, 1919; 
uw 28 & 
*In my paper in Canadian Entomologist, February, 1921, text-fig. 4c, p. 42, I 
inadvertently figured the forewing of this species under the name confusus. 
