For explanatory diagram of the wings, see Fig. 161, I. When the nervuration is obscured by the wing-scales, it may be rendered temporarily visible by the application, with a camel's-hair brush, of a little benzine. The wings may be permanently denuded of their scales by being placed for a short time in Eau de Javelle (hypochlorite of potash).
The genus Cyphanta (one species from India) has nervule 5 of the fore wing proceeding from the lower angle of the cell.
This is a mistake of Sir George Hampson's. It has long been known that the female of Heterogynis does not leave the cocoon (for references see p. [392]); the larvae, however, do not live in cases, as those of Psychidae do.
See Westwood, Tr. Linn. Soc. London (2), i. 1877, p. 165, etc.
For habits of some Brazilian Castnia see Seitz, Ent. Zeit. Stettin, li. 1890, p. 258.