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Subfamily ENNOMINAE. 

 12. Eurythecodes mutabilis spec uov. 



d. Forcwiixjs : diill greyish olive, dusted with black scales ; the lines slightly 

 darker, the inner preceded, the onter followed, b}' a paler line, and both marked by 

 dark vein-spots : first from oue-third of costa to one-third of inner margin, bent on 

 the snbcostal vein, thence nearly vertical ; outer line slightly cnrved, from two-thirds 

 of inner margin towards apex, angled on vein 7 and retracted shortly to costa ; a 

 black cell-siiot; some irregular dark clouds in the marginal area; fringe concolorons. 



Jlhu/iciiii/s : with a single nearly straight line just beyond middle, preceded by 

 the black cell-dot ; the colour paler, less olive-tinged. 



Underside of forewiiigs olive-cinereous with darker dusting, the outer line only 

 indicated ; hindwings jialer, with coarse olive-fuscous speckles ; outer line distinct, 

 dentate-lunulate, black-marked on the veins ; cell-spots in both wings. Head, 

 thorax, and abdomen like wings. 



? . Always much paler and yellower. 



Expanse of wings : c?, 37 mm. ; ¥ , 39 mm. 



A long series of both sexes from the Kikuyu Escarpment, British East Africa, 

 Jan. 1901, 0600— 90UU ft. (Doherty). 



The species varies greatly ; the above may be taken as the commonest form, 

 which itself varies much in the amount of olive suffusion and iu the clearness of the 

 lines. 



There are three main forms of variation ; the first, which I propose to term 



ab. pallida, 



has the ground-colour pale ochreous, freckled with brownish ; the two lines brown, 

 and the cell-spots dark ; no trace of other markings ; cJc? only. 



The second is an intensification of the type-form and of aberr. pallida. In this 

 the outer line is followed by blackish scales and five blackish blotches — two between 

 veins 2 and 4 touching the outer line, and two beyond them nearer hindmargin, the 

 fifth between the two upper pairs below vein 2 ; these are also present, but less 

 pronounced, in the hindwings ; this aberration, 



all. punctata, 

 occurs in both sexes. 



In the third, 



b. immaculata, 

 one largo velvety black spot stands beyond the outer line between veins 2 and 3 ; 

 this form likewise occurs in both sexes. 



In all cases the ? is yellow, sometimes golden-yellow, the fringe darker. The 

 costa of forewings is well arched throughout, and the hindmargin angled in middle 

 of both wings. In the hindwings the costal is closely approximated to the subcostal 

 for i|uite half the cell. 



Although the insect must be jdentiful — nearly a hundred specimens having 

 been secured by Doherty— I have not been able to find any description which is 

 apiilicable to it in any of its forms. 



In the original description of the nenration of the genus Etiri/thecodes it was 

 stated that 10 and 11 coincidently anastomosed with 12 ; it would be more correct, 

 iu this and in similar cases, to consider 11 as given oft' from 12, and 10 as rising 

 separately and anastomosing willi I 1. 



