298 Transactions. 
This species closely resembles Hydrochorema crassicaudatum n. sp. in 
size and shape, but can be distinguished from it by its more fulvous 
forewings, its peculiar venation, and the very short anal appendages of the 
male. 
Genus ТіРновт0818 n. g. (Text-fig. 13.) 
Wings narrow, forewing with posterior margin parallel to costa, apex 
symmetrically pointed and lying between R, and M,; hindwing also 
pointed, apex just below R,. Forewing with all five apical forks present ; 
hindwing with only 1, 2, and 5. — Pterostigma strongly developed in fore- 
wing. No closed cells present in either wing, except only thyridial cell 
of forewing. Ве well developed in both wings, R, and basal part of M 
obsolescent in hindwing. Forewing with fork of Cu, of specialized form, 
very narrow; 2A meets 1A close to its end, and 3A meets 2A about 
half-way along its length. Tibial spurs 2, 4, 4, those of fore tibiae greatly 
"Rn 
Tzxr-Fic. 13.— Details of structure in the genus Tiphobiosis n. g. a, wing-venation 
grey" ‚ Sp. 4. b, distal half of forewing of T. fulva n. Sp., ?- 
i rst four segments of antenna of Т. montana n. sp, d (x 75) d, end of 
elongated ovipositor of MM of Т. montana n. sp., showing the two small, oar 
; - 10 а the dotted lines in forewing indicate the position o 
the small hyaline areas. (For lettering of a and b see р. 314.) E 
reduced. Male with short gona 
Zonapophyses but long pre-anal appendages 
and outgrowth of tenth tergite. Female with ond корка of abdomen 
i the shape of wings, absence 
radial cell in forewing, presence of Af, and absence of Af, in hindwing, 
. 
. is 
subalpine caddis-flies, both con: : 
p 8, nfined, uthern 
part of the South Island. as far as is known, to the so 
