74 



different stages is appended, not as a technical contribution, but as 

 supplemental to the plate : 



Adult. — The wing expanse of the adult female is 3 to 4 inches- 

 The male is smaller, having a wing expanse of 2f to 3 inches. Con- 

 siderable variation is exhibited in the ornamentation of the Avings, 

 two distinct varieties being illustrated in the material in the Na- 

 tional Museum. The general color is rustv brown. The forewings 

 are crossed with a broad diagonal white band; the posterior wings 

 have a similar band, broader and less sharply defined, crossing them 

 at right angles to the band of the forewings. The hindwings have 

 also a submarginal row of 6 or T reddish-yellow spots, the central 

 spots being much larger than the lateral ones. A variation in colora- 

 tion, as in the example figured, is seen in some specimens in the pres- 

 ence on the forewings of an additional irregular row of spots forming 

 a band exterior to and irregularly parallel to the broad transverse 

 band. The notable feature of the wings is the brilliant opalescence, 

 especially notable near the body. The antennae are clubbed, giving 

 them a resemblance to the true diurnal Lepidoptera. The under sur- 

 face is lighter than the upper, with the markings aj^proximately 

 repeated and rather more distinct save for the yellow spots, which are 

 faint. There is also an additional submarginal row of white spots 

 on the anterior wings. 



Larva. — The larva, illustrated on Plate IV, figs, h and <?, varies 

 from 2 to 2^ inches in length, is white or flesh-colored, and very 

 elongate. The head is relatively small and pointed, of a light chest- 

 nut, with mandibles and more or less of mouth parts black. The 

 body is smooth and practically devoid of hairs, although minute ones 

 which have significance in classification are found, as indicated in the 

 drawing. The prolegs bear two transverse rows of stout curved 

 opines or hooks. The spiracles are very large, oval, prominent ; the 

 prothoracic pair and the pair on the last abdominal segment are 

 about twice the size of the others. 



Pupa. — The pupa (figs, e and /) measures an inch and a half in 

 length, is fairly robust, chestnut broAvn in color, and in general 

 smooth and shining. There is a strongly excavated crescent-shaped 

 spiracular pocket on either side of the pronotum. The prominent 

 features are the two transverse rows of strong reflexed spines, or teeth, 

 on the dorsum of each of the abdominal segments extending laterally, 

 a little beyond the spiracles. The anterior row of spines is much 

 stronger than the posterior, and the latter is wanting or nearly so on 

 the two terminal segments. The tip of the pupa is squarely truncate 

 and ornamented with a series of sharp ridges. 



Egg. — The ^gg (fig. cl) is flesh colored, white when empty, very 

 elongate, and with five strong carin^e, giving in cross section the 



