106 Transactions. — Zoology. 



fuscous, suffusedly ringed with whitish-ochreous, posterior tibiae 

 whitish- ochreous. Forewings elongate, costa moderately arched, 

 apex obtuse, hindmargin very obliquely rounded ; whitish- 

 ocbreous, irregularly suffused with fuscous, and more or less 

 strongly coarsely irrorated with blackish ; a large tuft of scales 

 very near base, a small one near inner margin at \, a third on 

 fold opposite middle of inner margin, and a fourth above anal 

 angle ; the blackish irroration tends to form two triangular 

 blotches, of which apex touches inner margin at ^ and § ; an 

 ill-defined roundish ochreous-whitish ante-apical spot, preceded 

 by a blackish-fuscous suffusion margining it : cilia fuscous, 

 towards base irrorated with dark fuscous and very obscurely 

 spotted with ochreous-whitish. Hindwings whitish-fuscous ; 

 cilia fuscous-whitish, with a faint darker line. 



Wellington, Lake Wakatipu, and Invercaigill, in December 

 and January; several specimens, usually at rest on tree-trunks. 



Art. XVI.-— On Henops brunneus, Hutton. 



By W. M. Haskell, F.E.M.S. 

 [Read before the Wellington Philosophical Society, 11th January, 1888.] 



Plate X., fig. 1-12. 



About October last, a resident in the Wairarapa District sent 

 down to the Colonial Museum a few twigs of apple, quite covered 

 over with some black substance, amongst which were slowly 

 crawling about half-a-dozen rather large flies ; and he desired 

 some information on this, which he considered as a new 

 " blight," stating that it occurred on both apple and peach trees 

 in his garden. The specimens were referred to me ; and at first 

 sight 1 thought the sooty black coating to be the usual fungus 

 accompanying scale-insects, the flies being unconnected with it. 

 Closer examination, however, showed that the black mass was 

 really composed of many thousands of eggs ; and the flies were 

 soon observed to be still laying more of these eggs on the twig, 

 until in a short while it was so thickly covered with them as to 

 be quite hidden. With the assistance of Mr. G. V. Hudson I 

 found that the flies were undoubtedly Henops brunneus, a species 

 of Dipteron hitherto only reported (in Hutton's "Catalogue of 

 N.Z. Diptera") irom Lake Wanaka. I was able to assure the 

 genthman who sent the specimens that probably they would not 

 do great harm to his trees. 



But the investigation so far showed that the knowledge of 

 Henops hitherto possessed was incomplete. The available works 



