Mil. n. m'LACHLAN on NEW-ZEALANJ) TRICHOPTEBA. 205 



mesothorax fuscous, hairless at the sides, but with a central median 

 depression filled with brown hairs; metathorax fuscous, hairless. 

 Wings— anterior wings rather broad, the apex broadly elliptical, fuscous, 

 thickly clothed with short brown hairs, and thinly sprinkled with pale 

 whitish-yellow dots, some of which on the dorsal margin and at the 

 apex are larger than the others (these dots are few in number and 

 not conspicuous) ; fringes brown, with one or two whitish spaces ; 

 discoidal cell elongate ; apical forks 1, 2, 3, 4, and 5 all present ; the 

 first one short, second long, reaching the anastomosis; third and 

 fourth longer than the first, nearly equal; fifth as long as the second, 

 but scarcely reaching the anastomosis : posterior wings broader than 

 the anterior, smoky subhyaline, with smoky-grey pubescence and 

 fringes ; discoidal cell open ; apical forks 2 and 6 present ; the first 

 two costulae not connected by a veinlet. (Plate II. fig. 8.) 

 Legs dingy brownish testaceous ; spurs darker brown. 

 Abdomen fuscous, somewhat ochreous beneath. In the S there is a 

 narrow elongate testaceous lobe from the apical margin of the last 

 dorsal segment, curved downwards, beneath which are the needle-^^ 

 shaped app. intermed. ; app. sup. broad and spoon-shaped, yellow, 

 fringed with long hairs ; app. inf. forming two long finger-shaped 

 yellow lobes, clothed with fuscous hairs. In the $ there are two 

 lanceolate and acute hairy inferior valves. [6, ? •) (Plate II. 

 figs. 8a, D.) 

 Christchurch, Canterbury {Fereday) ; Auckland {Edwards): 2 <J , 3 ? . 

 The examples from Auckland are in very bad condition ; they 

 are darker-coloured than those from Christchurch, but are speci- 

 fically identical. 



The genus Folycentropm, as restricted by me in the ' Tricho- 

 ptera Britannica,' now admits of a wider grouping of the species, 

 according to the neuration, than I there proposed ; and it is pro- 

 bable that some of the yet insufficiently characterized Ceylonese 

 and American species will yet add more new features in this 



respect. 



I give the following table as an extension of the grouping 



formerly adopted : — 



A. Discoidal cell open in the posterior wings. 



a. Apical forks 1, 2, and 6 present in these wings; the first 

 two costulse united by a short veinlet.— Type P.Jlavoma- 

 culatus, Pictet. 



b. Apical forks 2 and 6 present; the first two costula; not 

 iiiiitcd.— Typo P. orientalis, M'Lnchlan*. 



» I somewhat incorrectly stated (Trans. Bnt. Soc. London, ser. 3, vol. v. p. 

 273) that the neuration of P. orientalis was arranged aUogcthor alter the manner 



