440 I\rr. A, T. Masterman on the Food o/'Sagltta. 



XLVIII. — On a new Species of the Hepialid Genus CEiietus. 

 Bj the Hon. Walter Rothschild. 



(Enetus mirahilis, sp. n. 



Male. — Upperside. Fore wings opalescent sky-blue ; costa, 

 a central and a subraarginal transverse band bright green ; 

 on tlie inner side of the central transverse band is a row of 

 oblong white spots; basal half of fore wings and costa netted 

 all over with greyish-white half-moon-shaped spots ; outer 

 half of fore wings crossed by four transverse rows of small 

 whitish-grey rings enclosing a green spot. 



Hind wings opalescent white : thorax and fore legs greyish 

 green ; abdomen white, with two enormous yellowish-brown 

 lateral tufts at the base. 



Underside of wings and body greenish white. 



Expanse 5'5 inchcs=140 niillim. 



Hab. Cedar Bay, North Queensland. 



Note. — Viewed from behind or in a bad light this moth does 

 not exhibit the blue ground, but appears of a dull sage-green. 

 The extraordinary tufts at the base of the abdomen are un- 

 questionably the atrophied last pair of legs, whicii have been 

 transformed into male scent-producing organs, in the midst 

 of which the tarsi plainly project, though thin, abortive, and 

 functionless. 



XLIX.— iVo^e on the Food of Sagitta. By Arthur T. 

 J\Iasterman, B.A. (Cantab.), Assistant Professor of Natural 

 History, University of St. Andrews. 



The food of this common pelagic animal has been a subject 

 to which much attention hf _. been paid, amongst others, by 

 Mr. Scott*, Naturalist to the Scottish Fishery Board. He 

 finds, partly by direct observation and partly by examination 

 of the contents of the alimentary canal, that Sagittiv prey 

 upon such Copepods as Calamus fnmarchicits and small 

 Ampliipods [Pho'vus plumosus, for example), and that small 

 larval and postlarval fishes do not come amiss to them, which 

 lias an im))ortant bearing when the enormous numbers of 

 Sagittic which frequently occur in the tow-nets are taken into 

 account. At any rate Sagitta must take its phice amoiigst 

 the enemies of the fry of our food-fishes. Recently j\[r. Scott 

 finds that Sagitta preys upon its own species, and he describes 

 a case of tiiis as observed by himself. 



In September 18i)2 in the St. Andrews Marine Laboratory 



* 'Annals ufSc. ttisli Natunil lli-ton,' April iS'.ii' ami ]S!):5, 



