142 Transactions. — Zoology. 



interesting in another way, from its bearing on general theories of develop- 

 ment, since it is my opinion that although now justifiably to be regarded as 

 a species, it has reached this stage only within extremely recent times ; I 

 think it would be interesting to experiment on the larva3 of this species with 

 different food-plants, and conversely to try the effect of feeding C. excessana 

 on Phyllocladus. 



GBAPHOLITHIM. 



Chiloides, Butl. « 



Thorax smooth. Antennas in male serrate, with whorls of moderate 

 cilia. Palpi long, straight, porrected, triangularly scaled. Forewings with 

 costa in male simple. Hindwings broader than forewings. Forewings with 

 12 veins, 7 and 8 separate, 7 to hindmargin, secondary cell well-defined. 

 Hindwings with 8 veins, 3 and 4 remote at base, 4 and 5 almost from a 

 point, 6 and 7 approximated towards base. 



Allied to Bactra, Stph. (Aphelia, Stph.), but differing in the separation 

 of veins 3 and 4 of the hindwings, and the longer palpi ; only the species 

 here given is known. 



Chil. straminea, Butl. 

 (Chiloides straminea, Butl., Ann. Mag. Nat. Hist., 1881, 393.) 



Media, alis ant. ochreis, venis omnibus lineisque inter venas punctatis, 

 puncto etiam disci postico nigrescentibus ; post, griseis. 



Male, female. — 17-24 mm. Head, palpi, antennas, and thorax pale och- 

 reous. Abdomen whitish. Legs pale ochreous, posterior pair ochreous- 

 whitish. Forewings elongate, oblong, costa moderately arched, apex round- 

 pointed, hindmargin slightly sinuate, rather strongly oblique ; light ochreous ; 

 all veins marked with fine fuscous or blackish lines ; intervenal spaces also 

 marked each with a fine'ancomplete, often interrupted or dotted, fuscous or 

 blackish line ; a larger dark fuscous dot in disc beyond middle ; inner mar- 

 gin dotted with black : cilia pale ochreous. Hindwings grey, towards base 

 lighter ; cilia white, with a grey line. 



Becalls some forms of Bactra lanceolana, Hb., from which it is easiest 

 separated by the structural characters. 



Hamilton, Taranaki, Wanganui, and Otaki ; common amongst rushes 

 (Juncus) in swampy ground, from January to March. Also occurs in the 

 Hawaiian Islands, from which it was originally described ; I have seen 

 Butler's type, and there is no doubt whatever of its identity ; probably 

 therefore it will be found to range through all the Pacific islands. 



Bactka, Stph. 



This generic name should be substituted for Aphelia, Stph., of which 

 lanceolana, Hb., is the representative in New Zealand. I make this change 

 on the authority of Professor Fernald, who has specially investigated the 

 point, and is doubtless correct. 



