516 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. VIII, 
T. drona isin the British Museum from Java only, and I have never 
met with it in India or Burma, but it is recorded from Ceylon by 
Moore, though probably the insect referred to by him is not the same 
as that identified in the British Museum as 7. drona. 
L. libythea, from which, as identified in the British Museum, 
T. rubella is inseparable, is in the British Museum from Poona and 
Sheemagar, Upper Burma, and im my collection from the Nilgiris, 
Ganjam, Mysore, Tenasserim, and the Shan States. I am inclined to 
believe that 7. libythea is the female of 7. senna. 
The T. harina group is represented in India by one species alone, 
which varies slightly seasonably in the breadth of the black margins of 
both wings. The more heavily-marked or wet-season form has been 
named 7’. formosa by Wallace. 
Mr. Butler has given it as his opinion that the only true species is a 
local race, but in this I do not see my way to agree with him, nor does 
the British Museum collection arranged with his own hands bear him 
out. For in it we see forms suchas 7. fimbriata, T. narcissus, and 
T. asphodelus arranged as three distinct species, z.e., as three ‘‘ local 
races ;” but specimens of these three ‘‘ local races’’ are all in the 
British Museum from the one locality of Campbellpore, and the only 
conclusion to which we can come is that the variation between the 
three forms is due to the different local influences of three adjoining 
compounds or gardens, a conclusion which is certainly justified by the 
extent of the variation, but in spite of that I question very much 
whether such is Mr. Butler’s contention. But if on the other hand we 
conclude that these three forms are simply modifications of one species 
due to slight atmospheric changes shortly before their emergence from 
the pupa, in my opinion we should be much nearer the mark; as it 
is evident to any one who has taken the trouble to catch numbers of 
Terias from month to month that this genus is pre-eminently affected 
by the state of the atmosphere. A similar reductio ad absurdum could 
be made in the case of almost every “ species” of the 7. hecabe 
group, many of the “ local races’ of which will be found together in 
the same spot, while at the same time 7. excavata is in the British 
Museum from Bombay and Pegu, 7. purreea from Kangra and 
Kyoukmyoung in Burma, 7. patruelis from the North-West Himalayas 
and Christmas Island, T. irregularis from Campbellpore and Assam, 
