32 Transactions. 



Genus Philorheithous, gen. nov. 

 [Greek, perOpov = stream.] 



1st joint of antennae longer than breadth of vertex, densely hairy. 

 Maxillary palpi with basal joint very short, 2-5 subequal. Labial palpi 

 with 1st joint short, the 3rd longer than the 2nd. Forewings rather narrow, 

 dilated before apex ; subcosta and radius connected near base ; a series 

 of transverse veins connecting th,e longitudinal veins successively from 

 radius to upper branch of superior cubitus closes a large discal area ; a 

 chitinous nodule on dorsum near base serves as frenulum. Hindwings 

 obtusely elongate-triangular, with a closed discal area similar to that of 

 forewings. Tibial spurs 2, 4, 4. 



Distribution : New Zealand. 



The type (P. agilis, Huds.) is described by Hudson (" New Zealand 

 Neuroptera," p. 64) as follows : — 



" ? CKjilis, n. sp. 



" The expansion of the wings is about 1^ inches. The antennae 

 are rather stout, and about the same length as the forewings. Spurs 2, 

 4, 4. The forewings have the costa slightly arched at the base, and much, 

 arched before the apex ; the termen is sharply excavated near the middle. 

 The general colour of the forewings is pale brown, paler in the middle with 

 a large almost white patch towards the tornus, partially bordered by a 

 number of dark chocolate-brown markings. The hindwings are yellowish- 

 brown, darker towards the apex. The body is dark brown." 



In the same place is a description of the larva and of the remarkable 

 habits of the imago. 



Hah. — Wainuiomata River, Wellington. 



Genus Hydropsyche, Pict. 

 Hydropsyche auricoma, n. sp. 



Brownish-fuscous. Antennae brownish-fuscous, segments tipped with 

 pale ochreous. Head, prothorax, and mesothorax densely clothed with 

 pale-golden hairs. Forewings greyish-yellow, with darker reticulations ; 

 four series of brownish-fuscous marks tending to form transverse bands. 

 Hindwings greyish, slightly iridescent. Legs pale ochreous. Abdomen 

 brownish-ochreous, darker above. 



Length of body, 5 mm. Expanse of wings, 15 mm. 



Hah. — Wellinoton. 



o^ 



Genus Hydrobiosis, McL. 

 Hydrobiosis occulta, n. sp. 



3 . Dark brown. Antennae rather longer than forewings, dark brown,, 

 almost unicolorous ; the basal joint, with the face and prothorax, clothed 

 with golden-brown hairs. Forewings dark brown with dense golden-brown 

 pubescence. Hindwings with pubescence scantier and dark brown. Legs 

 light ochreous-brown. Abdomen without ventral teeth. Penis yellow ; 

 inferior appendices directed upwards and curved so as to meet over 

 extremity of abdomen. 



Length, 6 mm. Expanse of wings, 14 mm. , 



