200 Proceedings of the Biological Society of Washington. 
two yellow spots, one on the first and second labials, the other on the 
fifth and sixth; edges of lower lip with four dark dots on each side, all 
other lower snrfaces creamy white, immaculate. 
Remarks. I found this sj)ecies labelled E. blumii, a form with which 
it is doubtless closely related. I may add here that specimens which 
seem to be undoubtedly bluniii from Rio Janeiro and Mendez, on the 
Parahyba River, vary somewhat in that the parietals may, in fully adult 
individuals, be verj^ nearly twice tus long as broad, while in younger 
examples the parietals are shorter. I do not know whether this fact is to 
be accounted for by individual variation or by change during growth, 
but I suspect that the relation has I)ut very little diagnostic value, although 
it has been emphasized by Boulenger, who uses it in his key (Cat. 8n. 
Brit. Mus., Vol. 3, 1896, p. 239). 
