19G MT^. B. M'TiACirriAN ON NEW-ZEALAND TRTCnOPTKUA. - 



On some new Forms of Tricliopterous Insects from New Zealand ; 

 with a List of the Species known to inhabit those Colonies. By 

 RoBEET M'Lachlan, F.L.S., Sec. Ent. Soc. 



(Plate IT.) 

 [Eead May 7, 1868.] 

 With the idea of stimulating entomologists in our New-Zealand 

 colonies to further observation of their yet little-known insect- 

 fauna, I have the honour to submit to the Society a few descrip- 

 tions of new forms of Trichoptera, chiefly collected for me in the 

 Caaterbury settlement by my kind friend R. W. Fereday, Esq., 

 who has been a resident there for several years ; at the same time 

 I have put together a list of the New- Zealand species, so far as they 

 are at present known — premising, however, that this list probably 

 does not represent one-tenth part of what actually exist. The 

 few species liitherto collected show a marked generic, and perhaps 

 in some cases specific, identity with the meagre material yet pro- 

 cured from New Holland. 



I have elsewhere, more than once, called attention to the ap- 

 parent absence in the southern hemisphere of the great typical 

 Trichopterous families — Phryganidce and Limnepliilidce. Certainly 

 they have not yet been found in New Zealand or New Holland. 

 But Chili possesses at least one species of the latter family ; for, 

 according to information received from llerr Brauer, the Vienna 

 Museum contains an insect from Chili which is apparently a Lim- 

 nephilus, and which that gentleman refers to Phryganea impluviata 

 of Blanchard (in Gay's ' Historia Fisica') — though, from the im- 

 perfect description of that insect, it had seemed to me to pertain 

 to the family Phryganidw near Agrypnia. Pai'allel cases are well 

 known, inasmuch as Argynnis, amongst Bvitterflies, and Carahus, 

 in Beetles, reappear in Chili, though absent in the vast regions 

 of tropical America. 



Family SERICOSTOMlD.^i:. 



Genus Oltnx, n. g. 



Head — antennce slightly shorter than the wings, stout ; the basal 

 joint very long and thick, fringed beneath with long and strong 

 hairs : vertex small, with very long hairs at the sides turned in- 

 wards : maxillary palpi apparently two-jointed, cui'ved over tlie 

 face, short and subcylindrical ; the apex furnished Avitli a tuft of 

 very long liairs, which extend to the middle of tlie basal joint of 



