from the Hawaiian Islands. 325 



is pale grey, with the same lines nearly black ; another dark 

 fuscous, with a still darker cloud representing the dark area 

 of insignis^ but extending further before it reaches the costa. 

 The hind wings vary through all shades from pale ashy to 

 nearly black. Classified by locality, I can detect no differ- 

 ence, except that the specimens from the south of Hawaii 

 generally have darker hind wings." 



The preceding note certainly seems to show that H. ohsoleta 

 is extremely variable ; and yet the observation that the two 

 specimens which agree are referable to "i/! insignis " seems 

 to show that the gradation from one form to the other is not 

 perfect, and therefore that we may have here, as in the British 

 butterflies of the genus Pierisj nearly allied species widely 

 distributed and occurring constantly together, which never- 

 theless are distinct ; nothing but breeding can satisfactorily 

 decide the point, unless a perfect gradation can be shown ; and 

 even this is not always conclusive. In all probability the 

 larva would be found abundantly on nettles. 



9. Hypenodes altivolans^ var. simplex (No. 65). 

 Scoparia altivolans, Butler, E. M. M. xvii. p. 9 (1880). 



Primaries above bronzy brown, shining ; a dusky-edged 

 zigzag clay-coloured stripe across the basal third, followed 

 within the cell by a short oblique black dash ; a second arched 

 clay-coloured stripe with dusky inner edge across the external 

 third, followed by an irregular abbreviated stripe of the same 

 colours ; a submarginal lunulate white line breaking up into 

 small annular or ocellus-like spots towards the inner margin ; 

 a marginal series of black impressed dots followed by an inter- 

 rupted pale line at the base of the fringe ; secondaries shining 

 pale grey ; thorax bronzy brown, abdomen greyish brown. 

 Under surface uniformly grey. Expanse of wings 9^ lines. 



Var. Primaries above darker than in the type, the clay- 

 coloured stripes only indicated by their dusky margins, ex- 

 cepting towards the inner margin, also more irregular ; thorax 

 darker ; othei'wise similar. Expanse of wings 8 lines. 



Three specimens. " It occurs all over the Hawaiian arclii- 

 pelago ; but I have not observed it to be common " [T. B.). 



Hercynidse. 

 10. Boreophila minuscula, sp. n. (No. 134). 



Leaden grey above ; primaries with the basal third dusky, 

 crossed by an acutely angulated black line, and limited extei- 

 nally by an angular black stripe followed by a wliite stripe; two 



