[163] DESCRIPTION OF NEW SPECIES OF NISONIADES. 31 



Beneath (Plate 7, fig. 6), on the superiors, touching the discal cross- 

 vein and separated by the disco-central nervule, are two elongate, some- 

 times indistinct, yellow-brown spots. Between the subcostal nervules, 

 resting on elongate dark-brown spots, of which the second and third 

 are usually forked posteriorly, are three grayish quadrangular spots ; 

 behind the cell are two smaller ones (sometimes obsolete) surrounded 

 by brown ; between the median nervules are two quadrangular gray 

 spots of larger size than the preceding, and shaded behind with brown : 

 the above seven spots which form a less regular curve than in N. 

 Brizo $ beneath (Plate 7, fig. 10), with the spots less conspicuous and 

 not so uniform in size, correspond in position to the submarginal band 

 of the upper surface. Posterior to these is a row of grayish spots run- 

 ning from an apical patch of pale blue scales ; there is also a row of 

 elongate whitish spots resting anteriorly on a black terminal line. 



On the inferiors are two discal, yellow-brown, rounded spots, and 

 the two rows of similar spots of the hind margin, the anterior one of 

 which is preceded by a row of elongate dark-brown spots. Cilia of 

 the color of the ground of the wings, with a few of the shorter scales 

 grayish. Described from 11 <$ , 6 $ . 



N. Icelus is readily distinguished from JW. Brizo, to which it is 

 closely related, by its uniformly smaller size, its expanse varying from 

 1.20 to 1.40 of an inch, while the smallest Brizo in my collection 

 measures 1.50 of an inch. A marked characteristic feature is the costal 

 patch of bluish scales between the bands. 



The egg is of a pale green color. In shape it is a semi-ellipsoid ; its 

 base is flat and its apex depressed between the tips of the ribs which 

 terminate exterior to the depression. It is distinctly fluted even to the 

 naked eye, and with an one inch lens, the ribs may be seen of the 

 number usually of eleven, but not uniformly, for of nine specimens 

 examined, one was observed with ten ribs and one with twelve. Con- 

 necting the ribs are from thirty to thirty-five transverse striae. The 

 diameter of the egg is .031 of an inch, and its height .028 of an inch. 

 The larva has not been observed by me. 



The imago was captured for the first time the present year (1869), 

 on the 25th of May. The second week of June from the 9th to the 

 15th it was found abundantly at Center, resting with outspread wings 

 on damp sand in the road. A female Nisoniades, taken on the 7th of 

 July, differing in the much greater width of the submarginal band at 

 the inner margin, I have referred to the same species. I have taken it 

 at Schoharie, N. Y., on the 14th of June. 



ICELUS (Ic'-e-lus), in mythology, was a son of Somnus, the god of 

 sleep, associated with his brothers, Morpheus and Phantasos, in the 



