no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 67 



Fore wings of the 6* narrow and falcate; those of the. $ wider; in ? the costa is straight 

 on the basal two-thirds, bent backward in a peculiar way on the outer third; the apex much 

 arched, broad and squarish, and the outer edge below is rather deeply excavated, and in C. 

 JieriUa scalloped or denticulated, giving it a frayed or ragged appearance, but in C. nenia they are 

 entire. . 



Hind wings short and broad ; the apex rounded ; the outer edge full and convex; the inner 

 angle slightly produced, reaching to the end of the 9 abdomen. 



Venation: Remarkable from the fact that veins II 1? II 2 , and II 4 all originate at {M. 

 heriUa) the, or near the same point, quite far beyond the discal cell, and also beyond the middle 

 of the wing; veins 11^ and III 2 arise from a common stalk quite far beyond the discal veins; 

 each discal vein situated at about the middle of the wing, points inward, the upper one partly 

 obsolete; hind wings approaching type of Urota; origin of vein II within the middle of the 

 discal vein and near the base of the wing, and quite remote from origin of vein IIIj ; discal veins 

 together forming an obbque line directed outward and a little incurved. 



Genital armature : Suranal plate triangular, ending in a very long slender spine bent down 

 at right angles (M. nenia) or short and incurved (M. heritta), claspers oval, large and spreading, 

 sternite produced and spiny ( M. nenia) ; penis long, cylindrical. 



Legs moderately long and thick, with vestiture long; fore tibial scent appendages (nar- 

 theca) minute, much smaller than usual, about one-fourth as long as the tibia, thick, triquetal, 

 oval, lanceolate, tip not very sharp. 



Markings: The ground color is a singular fawn-brown, mimetic of the hue of a dead leaf. 

 No definite lines except obscure one in fore wings of M. nenia o* or traces of discal spots ; the 

 base of the hind wings to the middle pale yellowish. 



This is an extremely specialized form with moderately long but very slender maxillas. It 

 will probably be found to be remarkably mimetic of a dead leaf. By Walker the genus was 

 placed near Molippa sabina and by Kirby in the Pinaridas. The venation of the fore wings is 

 unique, but that of the hind wings is of the type of Urota. 



Geographical distribution. — The genus is confined to the African continent, M. JieriUa occur- 

 ring at Sierra Leone and M. nenia at Cape Palmos and Sierra Leone, M. agathyUa to Congo, 

 M. lichenoides to Ogove, while M. cana inhabits the Delagoa Bay region. 



Larva. — Body heavily armed with long stout sharp smooth spines; the dorsal thoracic and 

 median spines on eighth urite a little longer and larger than the others on urites 1 to 7; the 

 median spine on the eighth urite twice as thick as the others and deeply divided a quarter of its 

 length; prothoracic collar unarmed; suranal plate unarmed; skin black, with two rows of 

 flattened white rosette like warts; others collected about the spiracles. 



SYNOPSIS OF SPECIES. 



Fore wings in female not excavated [ Micragone]: 



Chestnut and red; male pink on costal edge of hind wings; male and female with two black-brown lines on fore 



wings, and bind wings with a large whitish patch M. nenia. 



Pale ochreous; lines wanting; costal region beneath pinkish; size small M. cana. 



Fore wings olive gray, striated with green-gray; black basal line; outer angle and apical third Vandyke brown, 



with intricate black zigzag submarginal lines M. lichenoides. 



Fore wings subfalcate; hind wings denticulated; reddish buff; hind wings on costal edge pink above; traces of 



an outer black line on fore wings M. agathylla [type of Micragone]. 



Fore wings in female excavated [Cyrtogone]: 



Wings mottled with chestnut; no definite lines; female with a large central cream patch on hind wings; size 



large ' M. herilla. 



[M. lichenoides (Holland), from West Africa, was described in Psyche VI (1893), p. 533. 

 M. ansorgei {Cyrtogone ansorgei Rothschdd), from Angola, was described in Ann. and Mag. 

 Nat. Hist., 1907, and figured in Nov. Zool. 1908, PL IX, f. 7.] 



