CADDIS-FLIES. 63- 



PSEUDCECONESUS MIMUS. 



Pseudceconesus mimus, McLachlan, Ent. Mo. Mag.,. 

 1894, p. 289. 



(Plate X., fig. 10.) 



This species is fairly common on the banks of many 

 of the tributary streams of the Wainui-o-mata River, near 

 Wellington. 



The expansion of the wings is 1£ inches. 



"Female. — Much like the same sex in (E. maori, but slightly smaller ; 

 the pale irrorations are larger and less regular ; near the base of the third 

 apical cell is a rather large, rounded, pale spot, on each side of which is a 

 somewhat conspicuous brown spot. On the antepenultimate ventral segment 

 is a very strong triangular tooth. The end of the abdomen in dried specimens 

 is very similar to that of (E. maori" (Hutton). 



The perfect insect appears in November, and frequents 

 streams running through dense forests. 



PSEUDCECONESUS STEAMINEUS. 



Pseudceconesus stramineus, McLachlan, Ent. Mo. Mag.,. 

 1894, p. 240. 



This species was described from specimens found on 

 the Tableland of Mount Arthur, near Nelson, at elevations- 

 ranging between 2,800 and 4,500 feet above the sea-level. 



The expansion of the wings is about 1J inches. 



" Male. — Stramineous or pale testaceous. Anterior wings pale greyish, 

 stramineous, closely irrorated with small whitish spots, apical margin nar- 

 rowly interruptedly fuscescent, inner margin with four or five long fuscous 

 lines alternating with long pale spaces. Posterior wings whitish-stramineous, 

 the apical portion yellowish, fringes concolorous. Penultimate and ante- 

 penultimate ventral segments of the abdomen each with an acute tooth ; 

 superior appendages lateral, quadrate, furnished with long hairs. Inter- 

 mediate appendages (or penis-cover?), viewed from above, consolidated into 

 a broad elongate plate, canaliculate above, deeply notched at the apex, fur- 

 nished with very long hairs. Inferior appendages 2-branched, the branches 

 distant, stout and cylindrical, curved so as to leave a semicircular space 

 between them. Length of body, 7 mm. ; expanse of wings, 28 mm. 



"Localities. — Wellington and Nelson. 



" Female. — Like the male, but the body darker, and the anterior wings 

 yellower. A sharp, broad, triangular tooth on the antepenultimate ventral' 

 segment. Margin of the last dorsal segment nearly straight and slightly 

 excised in its middle. Tubular piece forming two small, broad, triangular. 

 obtuse lobes, if viewed laterally, but open above and beneath. Length of 

 body, 10 mm. ; expanse of wings, 33 mm." (Hutton). 



The perfect insect appears in January. It frequents 

 the margins of mountain torrents. 



As the transformations of the three foregoing species 

 are at present unknown to me, I am unable to discrimi- 

 nate between them with certainty. 



