MosELy.—New Zealand Hydroptilidae. 673 
left; penis in all examples before me much exserted, and bearing a strong 
blackened tooth towards apex; process of seventh ventral segment short 
and broad; tooth on sixth ventral segment long and slender. 
In 9 the abdomen is stout, the last ventral segment deeply excised. 
There is a short tooth on penultimate segment. 
Habitat.—Tarawera, North Island, New Zealand; 12th November, 1919. 
Cawthron Institute collection. 
Paroxyethira hendersoni n. sp. (Figs. 6, 7, 8, 9.) 
Length of anterior wing, d, 3 mm. 
Antennae about 41-jointed iu d. — Last dorsal segment excised as above ; 
superior appendages long, broad, and concave; lower edges armed with 
numerous teeth. Towards their bases are two slender hooks curved over 
penis-sheaths, which are strongly bent downwards before apices; penis 
long and slender, with a small hook some distance below apex; ventral 
process of seventh segment very long and spatula-shaped, with blunt 
rounded apex. ao 
In 9 the abdomen is stout and at base of seventh ventral segment are 
two strongly chitinized plates bent over and directed towards each other. 
Habitats —River Tekapo, Mackenzie County, South Island, New Zea- 
land; 24th January -3rd February, 1922: in my collection. Spreydon, 
South Island, New Zealand ; October, 1919: Cawthron Institute collection. 
Arthur’s Pass, South Island, New Zealand; 16th January, 1920: Cawthron 
Institute collection. 
Paroxyethira eatoni n. sp. (Figs. 10. 11, 12.) 
Length of anterior wings, $, 3 mm. 
Antennae about 33-jointed in d. Last dorsal segment excised as above ; 
superior appendages concave, long and slender; upper margins gradually 
dilated below apices and curving inward ; lower margins armed with teeth 
and strong hairs; penis long and slender, with small hook some distance 
below apex; penis-sheaths long and strongly chitinized, extending nearly 
whole length of penis; process of seventh ventral segment as in P. hender- 
soni ; tooth on sixth ventral segment short. 
Female unknown. 
Habitat.—River Tekapo, Mackenzie County, South Island, New Zea- 
land; 24th January -3rd February, 1922. In my collection. 
Oxyethira albiceps McL. (Figs. 13, 14, 15.) 
As no figure of the genitalia has hitherto been published, I include 
amongst these descriptions drawings from the single d that I have before 
me. I am not altogether satisfied with these figures, as the balsam pre- 
paration has become very transparent and the various parts are somewhat 
obscure. The lateral aspect is a freehand sketch. 
abitat.—Spreydon, South Island, New Zealand. Bred by б. V. Hudson. 
Cawthron Institute collection. 
In conclusion, I must express my thanks to Mr. Kenneth J. Morton, 
who kindly read through and verified the above descriptions. 
22. Trans. 
