AIR. IJ. M'LA01ILA.N on NEW-ZEALAND TBICHOPTKnA. 209 



pale-yellow ; eyes black, with curved gilded lines j face with whitish 

 and blackish hairs intermingled ; palpi yellowish, fuscescent externally, 

 with yellowish pubescence. 

 Thorax — mesothorax dark castaneous, the disk nearly hairless, but with 

 blackish hairs on the wing-shoulders ; metathorax rather paler, the 

 metascutellura depressed and obovate. 

 Wings — anterior wings brown, with blackish and whitish hairs (placed 

 principally on the veins) intermingled, but the clothing is much less 

 dense than in H. frater ; in both sexes there are tufts of black hair 

 along the cubitus near the base, a row of yellowish dots round the 

 apical margin, and the fringe is also yellowish opposite to these spots, 

 otherwise it is brown and concolorous with the membrane ; ptero- 

 stigma darker, elongate ; neuration pale-yellowish, testaceous ; the 

 first apical cellule extending to the anastomosis ; second shorter, thus 

 having a short footstalk ; third, only one-third the length of its foot- 

 stalk ; fourth and fifth as long as the second: /jos^en'or wire^rs pale- 

 smoky subhyaline, with smoky pubescence, the margins with a 

 yellowish reflection ; fringes mostly greyish-yellow, but intermixed 

 with blackish ; neuration very distinct ; the first apical cellule ex- 

 tending almost from the transverse veinlet to the radius ; second very 

 long, reaching nearly to the base of the principal fork of the ramus 

 discoidalis ; third about as long as the first. • 



Legs pale testaceous ; the anterior tibice and tarsi slightly fuscescent 



externally, with paler rings. . , ..; 



Abdomen fuscous above, yellowish beneath, with scattered yellowish 

 hairs ; the S has but one ventral tooth, which is long, and placed on 

 the apical margin of the penultimate segment; the ventral surface 

 ends in a large valve, truncated when viewed from beneath the sides, 

 slightly concave, and emitting the app. inf., which are spine-like and 

 curved round in a semicircular manner; the apex of the dorsal sur- 

 face ends in a tuft of hairs, beneath which proceeds a long lobe 

 curved at its extremity ; on each side of this lobe is a small slender 

 appendice, which may be called the app, intermed. ; the app. sup. 

 are long and slender, curved downwards at the tips, which are slightly 

 dilated and rounded ; beneath the lobe are seen two pairs of sheaths, 

 the upper pair being needle-like, very slender, and much twisted, the 

 lower pair shorter, abruptly turned outwards at the tip ; these sheaths 

 probably conceal the penis, which is not evident in my dead speci- 

 mens. In the 5 there is a tooth on the penultimate ventral segment, 

 as in the S , but it is smaller ; the last ventral segment is deeply 

 notched in the middle of the apex ; the parts protruding from the 

 ill-defined cavity formed by the last dorsal and ventral segments are 

 not clearly definable. (Plate II. figs. 9c, d.) • , 

 Christchurch, Canterbury {Fereday); 2(S ,4 $. 



