32 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



approach each other, as in Cirina the small triangular discal spot of the fore wings and the round 

 ocellus resemble those of Imbrasia, though Cirina is less specialized in the shape of its wings 

 and the colors and size of the ocellus of the hinder pair, and shows a slight amount of degen- 

 eration in the loss of vein II 2 , and suggests that Imbrasia is the older form. 



CIRINA FORDA (Westwood). 



Plate XXXII, fig. 1; XXXV, fig. i; CX, figs. a-e. 



Saturnia forda Westwood, Proc. Zool. Soc. London, 1849, p. 52, No. 18. 

 Bunaea fordo. "Walker, Cat. Lep. Het. Br. Mus., V, p. 1232, No. 8, 1855. 

 Sculna invenusta Wallengren, Wein. cnt. Monatschr., IV, p. 168, No. 37, 1860. 

 Sculna invenuslus Wallengren, Vet. Akad. Haudl. (2) V, (4), p. 27, 1865. 

 Cirina cana Felder, Reise d. Novara, Lep., IV, Taf. 88, fig. 3, 1874. 

 Cirina forda Kirby, Syn. Cat. Lep. Het., I, p. 763, 1892. 



Imago. — One o* and two $ . Body and wings of a uniform pale umber or smoke-brown hue. 

 Head in front and tibiae reddish brown. No basal line on either wing. On the fore wing is a 

 faint dark extradiscal line beginning on the outer third of the inner edge and ending just before 

 reaching the costal edge on its outer fifth, the line being situated halfway between the discal 

 spot and the outer edge of the wing; the line is not sinuous. A much fainter extradiscal line on 

 the hind wings, passing much nearer the ocellus. Underside with the markings as above, but 

 less distinct, and on the hind wings more diffusely whitish around the ocellus. 



"The female has the ho&j and wings of a pale reddish buff, with the dusky striga beyond 

 the middle almost obliterated, and the dusky spot in the middle semicircular. On the underside 

 the hind wings have also a small oval dark spot toward the base." (Westwood.) 

 Expanse of the fore wings, 100 mm. 

 Length of a fore wing, 45 mm. 

 Breadth of a fore wing, 24 mm. 

 Length of hind wing, 37 mm. 

 Breadth of hind wing, 23 mm. 



Rothschild states that C. cana Felder is "only a small $ much rubbed and faded"; after 

 comparison with Felder's figure we should agree with this opinion. 



Larva. — Last stage: Length 53 mm., width of head 6 mm. Head of the usual shape, 

 black, more finely granulated than usual, but the granulations are arranged in groups and lines 

 as usual. Antennas, lateral region and mandibles chestnut brown. Body cylindrical, with 

 no tubercles or spines, the two dorsal setiferous warts on- the eighth and ninth abdominal segments 

 separate, or paired as in the preceding segments. 



Prothoracic plate smooth, only slightly rugose; the only traces of tubercles are a single 

 setiferous wart, one on each side of the median line near the front edge; and farther toward the 

 side is a group of three or four warts, and another group of four or five warts in front of each 

 spiracle; these give rise to long hair-like setae, which are usually rubbed off on handling; two 

 long white hairs arise behind the middle of the plate, one on each side of the median line. The 

 dorsal tubercles on the other segments are represented by groups of scattered warts, giving rise 

 to long thickened white hairs, the longest about two-thirds as long as the body is thick. 



On the eighth abdominal segment are two setiferous warts in place of a definite tubercle, 

 each wart having two setiferous wartlets and situated quite wide apart; the two dorsal setifer- 

 ous warts on the ninth segment are also similarly paired, each vestigial tubercle (larger than 

 those on the eighth segment) being about, five setiferous warts. 



Suranal plate short and broad, well rounded behind, rather smooth, a few (three) long setae 

 on each side or near each side near the base of the plate, and minute setiferous warts scattered 

 over the surface. Anal legs of moderate size, rounded triangular, with a few fine setae along the 

 edge. 



Surface of the segments very rugose, thrown up into sharp wavy microscopic ridges. The 

 hinder edge of each segment bearing two or three rows of oval pearly fungoid spots, either yellow 

 or white on top. On the side of the body above and around the dark spiracles they are much 



