490 HETEROCERA. 
DIDA, gen. nov. 
Male (?). Head and eyes small ; the thorax and abdomen slender, the latter only extending very slightly beyond 
the wings. Palpi porrect, formed very much as in the genus Hypena; the first joint very small; the 
second joint long, rather flattened, and thickly clothed with scales; the third joint more than half the 
length of the second, finely pointed. (Antenne broken, but the small part remaining appears to be 
simple.) Fore legs slender, with tufts of hair; (the hind legs wanting). The primaries rather long, 
narrow at the base, wide from the apex to the anal angle; the costal and inner margins straight; the 
apex pointed; the outer margin almost straight, but slightly rounded near the anal angle. ‘The 
secondaries short, rather broad, and considerably rounded from the apex to the anal angle, the inner 
margin also rounded near the anal angle. The fringe long. 
Type Dida cidaria. 
1. Dida cidaria, sp.n. (Tab. XLI. fig. 8.) 
Male (?). Primaries pale olive-brown, crossed from the costal to the inner margin by three waved darker 
brown lines—the first near the base, the second about the middle, the third almost submarginal,—the 
marginal line with dark brown points, the fringe dark olive-brown; secondaries very pale brown, 
slightly paler near the base; underside pale brown, both wings pinkish-brown round the margins: head, 
thorax, and abdomen pale olive-brown, the palpi and antenne brown. Expanse 13 inch. 
Hab. Mexico, Las Vigas (coll. Schaus). 
One specimen. 
