348 Transactions. 



transversely. Later on I joined Mr. George Howes at Arthur's Pass, and we 

 found the same cases in the streams around that locality. Those at Cass 

 were all empty ; but Mr. Howes was most fortunate in finding one at 

 Arthur's Pass containing a pupa, which emerged soon afterwards. The 

 insect proved to be the same species as that which I had been studying in 

 Mr. Hudson's collection. These facts are given as a guide to any collector 

 who might desire to obtain this insect by rearing it. 



The full description of the imago is as follows : — 



Family SERICOSTOMATIDAE. 

 Genus Zelandopsyche no v. gen. 



Allied to Oeconesus McL., and to Pseudoeconesus McL., but more especi- 

 ally to the latter, the forewings having neither a costal fold nor a well- 

 defined groove. Spurs 2, 4, 4 ; the two sets on the middle and hind tibiae 

 close together. In the male the maxillary palps (fig. 2) are three-jointed 

 and raised upwards, so as to lie close against the face ; the first two joints 

 are very short, cylindrical, the third very long, its basal two-thirds being 

 fusiform, its apical third much narrower and cylindrical ; the swollen basal 

 portion carries some long soft hairs, the apical portion more numerous but 

 much shorter ones. Antennae slightly longer than forewing in male, the 

 basal joint thickened, as long as the next three taken together. 



Fig. 1. — Zdandopsyclie ingens n. g. et sp., c? . Venation of forewing : Af l5 Af 2 , Af 3 , 

 the first three apical forks respectively; Cu 1? first cubitus; M 1; M 2 , M3 + 4, 

 the three branches of the media respectively ; M + Cu, fused stems of 

 media and cubitus ; Rj to R 6 , the five branches of the radius : re, radial 

 or discoidal cell ; Sc, subcosta ; s^'^^g'SP ^ ; t, thyridium. 



Wing-venation differing considerably infthe two sexes. In the female 

 the venation is fairly normal ; but Ri ends up on R 2 instead of on the 

 wing-margin, and the fork of Cu x is abnormal, in so far as Cu lb is in the 

 form of a cross-vein, and fuses with Cu 2 not far from its apex. The 

 discoidal or radial cell is closed, the median cell open. From the thyridium 

 (fig. 1, t), M34-4 runs obliquely downwards in a straight line to connect 

 with Cuj by a very short cross-vein at the point of origin of Cu lb , which 

 continues this line downwards with a backward bend. Near the base, M, Cu, 

 and 1A are all fused together ; 2A and 3A junction with 1A after it has 

 left M and Cu, which continue fused for a farther short distance. In 



