348 Mr. A. G. Butler on Heterocerous Leindoptera 



Blanchard's figure is incorrect in representing the 

 species as yellow, with an orange outer border ; the 

 whole insect, excepting the interno-basal area of the 

 secondaries, is washed with orange, but the ground tint 

 varies in intensity from pale buff in the lighter males to 

 reddish orange in the darker females ; the discal stripe 

 is confined to the primaries in the males, 



Var. definita. 



Differs from the typical form in having the white line 

 across the primaries edged internally with orange or 

 reddish ; the apex also more or less tinted with orange, 

 and the black costal dot at basal third replaced by an 

 oblique orange dash, such as one sees in some females. 

 Expanse of wings, 41 mm. 



"From Keed's collection." — T. E. 



It is a significant fact, as regards the weight to be 

 accorded to the decisions of collectors touching specific 

 or varietal characters, that this, an undoubted variety of 

 T. chilenaria, and the following, which in my belief is 

 only a slightly more marked variety, have been un- 

 hesitatingly separated under different numbers ; whereas 

 forms differing not only in pattern, but even in structure, 

 have been placed together. The fact is that collectors 

 as a rule are guided more by seeing specimens flying 

 together in the same locality, or the reverse, than by an 

 actual study of the specimens themselves ; and when the 

 cabinet-naturalist insists upon regarding two or three 

 allied species as distinct, he is at once informed of the 

 crushing fact that they all fly together ; indeed one 

 collector informed me that he had taken the types of two 

 very distinct species in, coimlCi, nor would he be convinced 

 of the contrary, even when I had proved to him that 

 both were females : Mr. Edmonds, though he is too good 

 an entomologist to make a mistake of this kind, has 

 nevertheless, to the best of my belief, made too much of 

 the present species, and not quite enough of some others 

 far more distinct. 



Var. continua. 



The white line replaced by a red-brown one, with pink 

 outer edge, and diffused golden ochreous borders ; this 

 line is also represented on the secondaries by an abbre- 

 viated red-brown line from the lower subcostal branch to 

 the abdominal margin. Expanse of wings, 44 mm. 



"Las Zorras, in February." — T. E. 



