340 GROTE AND ROBINSON, 



angle. Under surface dark wood- brown, without prominent markings ; 

 the terminal space and costal region is paler, on the latter the three 

 pale ante-apical dots of the upper surface are repeated; the internal 

 margin is more sparsely scaled below the nervure ("rippe 1," II- S.) 

 where the short squamation is tinged with reddish. Posterior wings, 

 above, closely scaled, wood-brown, with a faint reddish tinge over the 

 costal region. Beneath, there is a distinct dark discal dot, and the 

 exterior half of the wing is obsoletely limited as a darker portion. 



Expanse^ 55 m. m. Length of body, 27 m. m. 



% . Nearly resembles the female in color, size and ornamentation. 

 The antennae are clean pale testaceous, strongly and evenly bipectinate. 

 On the primaries there is a parallel elongate constricted spot, conco- 

 •lorous with the reuiform and partially fused with it, resting on the 

 median fold on the discal cell. This spot may be regarded as the or- 

 bicular, and is seen in some 9 specimens, though reduced and usually 

 absorbed by the outer edge of the oblique basal space. In its extent 

 this spot seems to be subject to individual variation. The general co- 

 lor of the S is paler than that of the ? • '-^ 'i^ deep shading outside 

 of the pale oblique basal space is very prominent below median nervure. 

 The abdomen is terminally pointed and narrowed ; since it is thickeued 

 and obtuse at the anus in the 9 , it presents a very striking sexual cha- 

 racter. 



Expanse^ 48 m. m. Leiicjtlt of hodjj, 23 m. m. 



Habitat. — Atlantic District. (N. Y.! ) 



This species differs from Arzama densa. Walk. (C. B. M. Lep. Het. 

 Supp. p. 645), the typical % specimen of which we have compared in 

 the British Museum, by its much larger size and difibrent color. In 

 ornamentation the two species are very similar. In A. obliquata the 

 primaries are more produced at apices and the external margin is more 

 sinuate. The style of ornamentation and appearance of this genus are 

 not a little singular. The heavy 9 abdomen and the dense squamation, 

 reminds one of the Bombycidae. The shape of the primaries is nor- 

 mal with the present family ; the costa is straight, and the nearly par- 

 allel internal margin is fully three-quarters as long as the costal, while 

 the peculiar ornamentation of the upper surface of the primaries de- 

 ceives one at first glance as to the real proportions of the wing. Mr. 

 ■ Walker's type is a male, in which the abdomen is comparatively slen- 

 der, terminating pointedly. The much smaller Georgia species is en- 

 tirely tinged with dull red-brown, the basal patch of the primaries is 



