108 Dr. H. Dewitz on Rudimentary 
I have much pleasure in dedicating this beautiful species to 
my friend Mr. Herbert Druce. That gentleman kindly re- 
minded me of the fact that Walker had described a species of 
this group from Mr. Saunders’s collection. Upon looking up 
the description of Walker’s MW. eyanedfera from Batchian and 
Ceram, hitherto undetermined by me, I find that it answers 
admirably to Cramer’s species M. glauca. It is extremely 
probable that Walker would describe the latter species in his 
Supplement, since in his Catalogue he identified M. lativitta 
and M. zonea of Moore as opposite sexes of Cramer’s species, 
and spoke of the typical J/. glauca as var. 8, suggesting that 
it might be a distinct species. 
Milionia Snellen, sp. n. 
@. Less brilliant in colour than the preceding ; primaries 
with the subbasal spot larger, more diffused, and bright ultra- 
marine blue, the belt across the wings much further from the 
base, arched, wider, cadmium-yellow, sprinkled at its inferior 
extremity with vermilion scales ; secondaries with the belt 
much wider, much nearer to the outer margin, its inner edge 
widely waved or subsigmoidal, colour vermilion ; basal area 
below narrowly streaked with bright blue. Hxpanse of wings 
70 millim. 
Celebes. 
This is not at all likely to be the female of MZ. Drucez, since 
the species of this genus are unquestionably alike in the sexes, 
whereas these two differ far more than some of the known 
species. M. Drucet, in the banding of the primaries, ap- 
proaches MW. requina, Quoy (=. optima, Walker, = M1. flam- 
mata, Vollenh.), whereas JZ. Snedlent has a band more nearly 
resembling that of J. glauca, though broader and more arched. 
J have named this species after Herr Snellen, the author of a 
long paper on the Lepidoptera of Celebes in the ‘ Tijdschrift 
voor Entomologie,’ 1878-81. 
XIV.— On Rudimentary Wings in the Coleoptera. 
By Dr. H. Dewitz*. 
THE hind wings of the Coleoptera show us most distinctly 
how an organ may gradually become aborted by disuse, and 
how. a transformation of the whole habit of the animal may 
* Translated by W.S. Dallas, F.L.S., from the ‘Zoologischer Anzei- 
ger, no, 141, June 18, 18838, p. 315. 
