no. i. BOMBYCDNTE MOTHS OF NORTH AMERICA— PACKARD. 249 



ricini. Fore wings decidedly falcate; hind wings much produced posteriorly and more pointed 

 than in P. vacuna, and not very wide or rounded. The ground or general color is in rather 

 peculiar, being a quite uniform dark vandyke brown, much darker than in P. cynthia raised in 

 the United States. Fore wings with the basal line white, passing straight from the costa to the 

 inner end of the discal spot, edged externally with dark brown (not so black as in P. cynthia 

 advena); a deep scallop in cell IV X , IV 3 (second cubital), with the sides produced along the base 

 of veins TV V TV 2 , the remainder of the line joining the extradiscal, thence passing to the inner 

 edge near the base of the wing. Extradiscal line white, not edged with blackish on the inner 

 edge (as in P. cynthia advena, United States), but accompanied externally by two bands, the 

 inner of the two (or middle one of the three) vandyke brown, with no lilac shade such as is to 

 be seen in P. cynthia; the other line white, both varying in width. Between this and near the 

 margin is a dark vandyke-brown shade, which has a regular edge, except near the apex, where 

 it sends a large tooth-like projection or acute scallop toward and nearly touching the ocellus; 

 there is also a smaller indistinct tooth between this and the costal region, the sinus thus formed 

 being occupied by a white slash extending to the ocellus. Apical scalloped white line consisting 

 of three small teeth, the first one obtuse, that nearest the ocellus sharp. 



Ocellus not rounded, but oblique, the blue-white line strong, curved unequally oblique, 

 tne lower side the shorter of the two and narrower and pointed at the end, whde the upper arm 

 of the semicircle, or u, is docked, the sinus being filled in with pale vandyke brown, and the 

 black outer shade in a narrower stripe passing around behind the end of the u. Submarginal 

 line straight with only a single scallop in the IV-VI cell. Discal spot parallel with the costa, 

 not much curved (shorter than in the adventive United States form), and of the same width as 

 the brown band; quite opaque, scarcely translucent, the white hair-like scales being dense; 

 the hinder ochreous margin of the spot is a little wider than the white portion (the yellow scales 

 on the right side cross to the anterior side of the white band, on the outer side not reaching it). 



Hind wings as in the fore wings; three parallel lines forming the extradiscal band, the inner 

 snow-white band being wider than that of the fore wings. The extradiscal band near the costa 

 is continuous with the basal curved white band. Discal spot regularly curved, the outer end 

 not pointed, but encroaching on the extradiscal, which is curved slightly outward, and farther 

 along bends regularly inward. The three darker marginal lines are much alike, the spots form- 

 ing the inner being nearly continuous. Body whitish at the base and at the tip of the abdomen. 

 Collar white. Legs ochreous and white. Under side of the wings slightly paler than above; 

 the markings a little paler, with a washed-out or faded appearance, especially the ocellus and 

 adjacent marks; no basal band on either pair of wings. Discal spot on hind wings quite regu- 

 larly bent at ea-ch end, not obliquely and unevenly as in the adventive form. 

 Expanse of fore wings, 120 mm.; length of fore wing, 60 mm. 

 Discal spot on the fore wing, 12 by 2\ mm. ; on hind wing, 6 b} r 3f mm. 



The hind wings are not so much rounded at the end as in P. vacuna, being decidedly pointed 

 in the 6* . It also differs from P. vacuna in the ocellus being oblique, not regularly oval, and 

 with much less black. 



Butler's & from Silhet differs, judging from his figure, from the above-described S from 

 Assam in being smaller (expanding 4 inches 4 lines) and in all the white lines being heavier and 

 broader, though not differing in their contours and relations to each other. The apical ocelli 

 are also a little rounder, less oblique and oval. His example is also drawn as somewhat paler. 



[DREPANOPTERA Rothschild.] 



PHTLOSAMIA VACUNA Westwood. 



Plate XCIV, figs, a, b, c. 



[Saturnia vacuna Westwood, Proc. Zool. Soc. Lond., 1849, p. 39, PI. 7, fig. 1.] 

 [Drepaywptera vacuna Rothschild, Nov. Zool., II (1895), p. 37.] 



Drepanoptera "differs from Philosamia by the male having the fore wings much more 

 falcate, elongated and narrower, and the females having all four wings much rounder and blunter. 



