NOTES ON THE SYNONYMY OF NOCTUID MOTHS. 285 
C. unicuba, Walk., said to have been collected in N. India, is 
certainly identical with C. nupta of Europe, and C. zalmunna, 
Butl., from Japan, cannot be separated from a fair series of the 
Kuropean C. electa. C. selecta, Walk., is the form of C. amatriz, 
without blackish patches on the primaries. 
Apart from its superior size, I fail to see how C. dilecta is to 
be distinguished from C.sponsa; it agrees on both surfaces, and 
varies in the same way. C. dula, Brem., on the other hand, 
though like it on the upper surface, is totally dissimilar below. 
I do not feel satisfied of the distinctness of C. angust and 
C. residua, Grote; and I certainly believe that C. retecta is no 
more than a slight variety of C. desperata. With a series of 
eleven examples before me, I have not been able to discover one 
constant character by which to distinguish them. In typical 
C. retecta the reniform spot tends to become slightly browner, 
and the whitish stripe across the disc a little more zigzag, than 
in typical C. desperata; but these points are variable. 
POLYDERMIDA. 
Brienina, Walk. 
Eliochroea, Walk. 
Blenina chrysochlora. 
Eliochroea chrysochlora, Walker, Lep. Het. Suppl. 3, p. 934 
(1865). 
Amphipyra? laportei, Felder, Reise der Nov. Lep. iv. pl. exi. 
fig, 28. 
Ceram. Type in Col. B. M. 
Felder and Rogenhofer’s error in referring this species to 
Amphipyra is not worse than my own. I referred a Triphena 
(T. curtipalpis) to EHliochroea, and a T'riphenopsis (T’. opulenta) 
to the same genus. It requires some little study of the neuration 
of the Noctuites to enable anyone to place the species correctly ; 
pattern and coloration are repeated in different families, and 
even the length of the palpi does not guide one infallibly. 
The genus Plotheia, hitherto referred to the family Hypo- 
erammide, is scarcely distinct from Blenina, and most certainly 
stands next to it. Mr. Hampson has clearly shown that all the 
Ceylonese forms are variations of one species. It may be divided 
into fairly well-marked forms thus :— 
Plotheia frontalis, Walk., = canescens and basifascia, = guttu- 
losa, == cinerascens, Walk. 
Var. a. P. decrescens, Walk., = onusta, = signata, = sub- 
glauca, Walk. 
Var. b. P. spurcata, Walk. 
Var. c. P. velata, Walk., = wnprimens, Walk. 
Var. d. P. concisa, Walk., = lichenoides, Felder. 
Var. e. P. lativitta, Moore, = lichenoides, Moore (not Felder). 
ENTOM.—NOov. 1892. 2D 
