1912.] 276 



ward as a provisional hypothesis only, and may, of course, be subject 

 to modification or rejection in the light of more extended investigations. 



As a subsidiary advantage the ability possessed by semi-apterous 

 females to secrete themselves in crevices in the bark or in the ground 

 may be mentioned, but I do not consider such an advantage would be 

 commensurate with the loss of flight, and it cannot therefore in my 

 opinion be regarded as the primary cause of the modification. 



In conclusion,! should perhaps point out that the extreme abundance 

 of many of the species possessing semi-apterous females indicates 

 that the innovation has proved a most successful one in the struggle 

 for existence, and this is further demonstrated by the fact that almost 

 all the species appear in winter, when the insectivorous birds are often 

 sorely pressed by hunger and in consequence keenly on the alert for 

 insect food. 



Hill VieWj Karori, 



Wellington, N. Z.: 

 August 9th, 1912. 



DESCRIPTIONS OF NEW LEPIDOPTEBA. 



BY HAMILTON H. DEUCE, F.L.S. ; HERBERT DRUCE, F.L.S. ; AND 



T. A. CHAPMAN, M.D., F.Z.S. 



(Plates IX, X.) 



LYCiENID^ AND HESPEEIID^: 



Supplementary Note and Figures (Plate ix, figs. 1-3 and 7-11 ; 



Plate X, figs. 1-7). 



BY HAMILTON H. DRUCE. F.L.S. 



Fain. Lyc^nid^. 

 Teratoneura isabellse, Dudgeon, Proc. Ent. Soc. Lond. 1909, p. li. 



By the kindness of Mr. Gr. C. Dvidgeon I am able to give a 

 coloured figure of the remarkable insect taken by him in Sierra Leone. 



Mr. Dudgeon's type is now in the British Museum. 

 Mimacrsea eltringJiami, H. H. Druce, Ann. and Mag. Nat. Hist., 



series 8, ix, p. 635 (1912). 



Mr. Eltringham has drawn my attention to a paper in the 

 " Annalen k.k. Naturhistorischen Hofmuseums, Wien, 1910," by Dr. 

 H. Rebel, wherein is described — p. 413, pi. 14, figs. 9, 10— Mimacrasa 

 parayora. Dr. Rebel had only the ? before him, and a comparison of 



X 2 



