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Vil 
the author, dated 18 Fevrier, 1875 :—‘ Le species des Sphingides, Sesiides 
et Castniides sera mis au vente Lundi prochain chez M. Roret editeur, 
Rue Hautefeuille a Paris.’” 
The Rey. R. P. Murray communicated the following remarks :— 
“The species of Terias forming the Hecabe group have long been a 
source of perplexity to me, and for some time I have entertained a suspicion 
that most of them were referable to but one species, TI. Hecabe, Linn. 
I think I am now able to bring forward proof that T. Aisiope, Mén., at 
least, is only a form of Hecabe, and some evidence that the same is probably 
the case with T. Brenda, Doubl., Hew., and T. Sari, Horsf. I have 
frequently received from Mr. Miskin, of Brisbane, specimens of typical 
T. Hecabe from Rockhampton, and also others of T’. Aisiope from Brisbane, 
these forms being common in their respective localities, while it is by no 
means common to find them intermixed. So far the only evidence in 
favour of their forming but one species was afforded by the large number of 
specimens intermediate in character which came from Rockhampton. But 
I now learn, by letters received from Mr. Miskin, that he has succeeded in 
breeding both forms from larvee found on the same plant (Indigofera, sp.), 
and that he is now convinced that both forms belong to the same species. 
The curious distribution of the forms would tend to prove that the difference 
in markings is not sexual, but dependent on certain conditions as yet un- 
known to us. Both forms appear to be equally common in N.W. India, 
from whence I have received them in considerable numbers. 
“T have never received the form T. Aisiope, Mén., from Japan, where 
typical Hecabe is common, but curiously enough I have seen large numbers 
_ of a Terias from Japan, which are, for the most part, indistinguishable from 
T. Brenda, Doubl., Hew., originally described from West Africa, but which 
graduate insensibly in typical Hecabe, so that I am strongly inclined to 
believe that this form (Brenda) replaces in Japan the Aisiope of Queens- 
land. 
“The evidence is not so strong with regard to T. Sari, Horsf., typical 
specimens of which seem exceedingly different from T. Hecabe, L. I possess, 
however, three specimens from Malacca, two of which are well-marked 
T. Sari, while the third, which is much smaller, presents certain peculiarities 
in the interior outline of the black hind margin of the anterior wings. 
Below, however, the quadrangular blotch distinctive of T. Sari is well- 
marked. A fourth specimen from the same locality, which must be referred 
to IT. Hecabe, while presenting no trace of the blotch on the under side, 
exactly agrees in size, and in the markings of the upper side, with the third 
Specimen just described. So that I think it is at least possible that T. Sari 
will ultimately be found to be but a form of the inconstant T. Hecabe.” 
Prof. Westwood suggested that the case might be analogous to that of 
certain English species of Pieris, where certain forms,—e.g., P. Napxe, 
