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X. On the remarkable resemblance between two species of 
Molippa. By E. DUKINFIELD JoNnES, F.Z.S., F.E.S. 
[Read 6th March, 1907.] 
PLATE XTYV. 
DuRiInG the many years I have lived in Brazil I have 
taken from time to time MJolippa sabina, Walker, which is 
a fairly common insect both in Sao Paulo and Parana. I 
found the larva in Sao Paulo feeding on Bauhinia, and in 
Parana on Bauhinia, Erythrina and Mimosa. 
In 1896 at Castro, Parana, I took some Saturniid cater- 
pillars on Mimosa that were new to me, and to my astonish- 
ment they produced moths that were apparently identical 
with JM, sabina, On sending specimens of the moth to 
Mr. W. Schaus, he gave me the species as JZ. sabina, and I 
came to the conclusion that this moth had a dimorphic 
larva. This conclusion was strengthened by my finding, 
on January 27th, 1899, a group of larve on AZimosa, some 
of which, just about to change skin (probably 3rd change), 
were of the normal form and colour, while others that had 
already changed were of the new form and colour. 
Since my return to England in 1902 I have shown the 
imagines of the two species, of which I have a good series, 
to several entomologists, and the opinion has invariably 
been that the two forms were the same species, so close is 
the resemblance between them. 
Last autumn it occurred to me that a comparison of the 
male genitalia might settle the question. The examina- 
tion proved satisfactorily that the two species are distinct, 
the form of the wncus being quite sufficient to establish 
this, all the males bred from what I have called the normal 
form of larva having the wacuvs as shown in Fig. 2a, and in 
those from the other larva as in Fig. lv. The finding of 
the larve of the two species associated in changing skin 
was fortuitous and misleading. 
The two species with dissections of the genitalia and 
photographs of the larve were exhibited at the meeting of 
the Society on Nov. 7th, 1906. 
On examining Walker’s type of sabina in the British 
TRANS. ENT. SOC. LOND. 1907.—PART I. (JUNE) 
