22 Mr. A. G. Butler on Hcteroccrous Lepidoptera 



The female is greyer than the male, with the external 

 area of secondaries' and ijody more rosy ; excepting in 

 its yellower tint throughout it comes very near to the 

 female of H. ei-ijthrcea, but the females of all these forms 

 are more alike than the males. 



35. Ilyperchiria erythroiis. 

 S . lo erijthrops, Blanchard, in Gay's * Chili,' 7, p. 59 ; 

 pi. 4, fig. 2 (1852). 



A pair. 



The female of this form is paler than any of the 

 others, but comes nearer to the female of H. acharon, 

 var. dehilis, than to any other, excepting in the width of 

 the external border of the secondaries, which is less by 

 one-third. Taking the width of this border as a guide, 

 the forms would stand thus : H. acharon, H. eri/thrcea, 

 H. erijtJtivj)s, 11. (jriseojiava ; and if this should prove 

 to be a reliable character, my var. olivacea will have to 

 be regarded as a species distinct from H. erijthrcea, its 

 border being no wider than that of H. erijthrops. 



NOTODONTID^. 



Drymonia, Tliihn. 



36. Drymonia pica, n. s. 



3 . Primaries above snow-white at the base, with a 

 subbasal 3-shaped black line, followed immediately by a 

 broad black band with slightly irregular margins, and 

 immediately succeeded by a second irregular slender 

 black line upon a broad snow-white belt ; a third black 

 line close to the wavy outer edge of this belt, which is 

 limited b}^ a broad sericeous grey external border, crossed 

 by blackish veins, sju-inkled with white scales, and edged 

 internally by a blackish streak at its costal and inferior 

 extremities ; fringe spotted with white ; the central 

 white belt is indistinctly traversed through its centre by 

 a squamose greyish line, and is fm'ther interrupted by a 

 black dash at the end of the cell ; secondaries pearly 

 white ; outer margin and the extremities of the veins 

 l)lack ; body snow-white, the posterior lateral margins of 

 the collar, the extremity of the tegulie, and the meta- 

 thorax black; antennae with reddish testaceous pecti- 

 nations, under surface white ; primaries with grey 



