Meybick. — Monograph of New Zealand Noctuina. 17 



posteriorly suffasedly margined with black except towards 

 extremities, with two acute teeth below middle almost touching 

 hiudmavgin : a hind-marginal row of black dots : cilia fuscous, 

 obscurely and slenderly barred with paler. Hindwings fuscous ; 

 cilia whitish, with a fuscous line. 



Blenheim and Christchurch ; from April to June, very 

 common. This species appears in some collections to stand for 

 Agrotis admirationis. 



21. Mam. plena, Walk. 



{Erana plena, Walk., Suppl., 744; Mamestra sphapnea, Feld., Reis. Nov., 

 pi. cix., 17; Dianthoecia viridis, Butl., Cist. Ent. ii., 547.) 



Male, female, — 33-34 mm. Differs from M. polychroa only 

 as follows : — Head, thorax, and forewings wholly suffused with 

 green ; no black streak from base ; sub-basal line double, well- 

 defined; first and second lines and a median shade tolerably 

 distinct; triangular supra-anal spot fuscous. 



Christchurch and Mount Hutt ; November to May, very 

 common. 



22. Mam. lithias, n. sp. 



Male. — 33 mm. Head, palpi, and thorax white, densely 

 irrorated with black and fuscous ; patagia with two obscure 

 black longitudinal streaks. Antennae grey, with strong triangu- 

 lar transverse dentations (1), terminating in tufts of cilia. 

 Abdomen grey. Legs dark grey, irrorated with white, banded 

 with black and white, spurs white with median black band. 

 Forewings moderately dilated, costa straight, apex obtuse, hind- 

 margin waved, somewhat oblique, rounded beneath ; fuscous, 

 irregularly suffused with grey ; veins coarsely and broadly 

 irrorated with black and white ; lines white, slender, subdentate, 

 irregularly blackish-margined ; a dark median shade ; orbicular 

 small, round, white, fuscous-centred, black-margined ; clavi- 

 form very small, but conspicuous, round, black, minutely 

 white-centred ; reniform oblong, white, fuscous-centred, black- 

 margined ; subterminal more obscure, nearly touching hind- 

 margin beneath costa, with two indistinct, rather more acute, 

 teeth below middle : cilia rather dark grey, slenderly barred 

 with white. Hindwings grey ; a darker hind-marginal line ; 

 cilia whito, with a pale grey line. 



Castle Hill ; two specimens, laken by Mr. J. D. Enys. 



23. Mam. mutans, Walk. 



{Hadena mutans, Walk., Noct., 602 ; H. lignifusca, ib., 603 ; Mamestra 

 angusta, Feld., Eeis. Nov., pi. cix., 18 ; M. acceptrix, ib., pi. cix., 19; 

 Hadena debilis, Butl., Proc. Zool. Soc. Lond., 1877, '663, pi. xlii., 6.) 



Male, female. — 34-39 mm. Head and palpi light reddish- 

 ochreous, or white mixed with fuscous and blackish. Aateun® 



2 



