TILLYARD.—Studies of New Zealand Trichoptera. 311 
as each lobe of the bifurcation; gonapophyses rather short, forcipate. 
Sternite 8 with a broad process extending from it. 
9. Closely resembling the male both in size and colour, but at once 
distinguished from it by the slender, five-segmented maxillary palpi and 
absence of the complicated genital appendages ; forewings also are slightly 
narrower at base. 
Техт-ғтс. 25.— Male genital appendages, dorsal view, of a, Pycnocentrodes 
olingoides n. sp.; b, Pycnocentrodes hamiltoni n. sp. Drawn from the 
dried insect. (х 45.) 
Types.—Holotype male and allotype female, Gouland Downs, Nelson 
Province (Tth February, 1922, R. T. J.); both in Cawthron Institute col- 
lection ; also à paratype male from same localit 
TA N 
it by the more fuscous hindwings of the latter, and by the fact that in 
the genus Olinga many of the hairs of the forewings are flattened down 
into the form of narrow scales. 
Pycnocentrodes hamiltoni n. sp. (Plate 19, fig. 17; text-fig. 25 b.) 
Closely similar in size and shape-to the preceding species, but the male 
Бе deg ; ; 
can at once tinguished by the colour of wings, which are semi- 
; also 
abdomen shows a tinge of greenish. From female of Olinga feredayi it 
can at once be distinguished by the difference of venation: radius in 
Olinga runs straight through pterostigma, and curvature of branches of 
M and Cu is different. 
Types.—Holotype male and allotype female, Pouto River, between 
Tokaanu and Lake Roto-Aira, North Island (27th November, 1919) ;. 
both in Cawthron Institute collection. RS 
