no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD 157 



[Subgenus CALOSATURNIA J. B. Smith.] 

 CALOSATURNIA MENDOCINO (Behrens). 

 Plate XLII, fig. 8; LXVIII, figs. 6, 7. 

 Saturnia mendocino Behrens, Can. Ent., VIII, p. 149, 1876. 

 [('alosalwnia mendocino J. B. Smith, Proc. U. S. Nat. Mus., IX (1886), p. 432.] 



[Smith's generic description is as follows: 



Head very much retracted; eyes small, narrow, ovate; tongue and palpi entirely aborted; 

 vestiture thin and divergent. Antennae of male with two branches to each side of each joint, 

 as usual, the pectinations extending to the tip. In the female the antennas are stout, shortly 

 pectinated to the tip; a single branch only to each side of each joint. Body vestiture hairy, 

 thin, divergent, the thorax comparatively short. Legs short and weak, the posterior pah- 

 shortest and weakest; no visible spurs to any pair of legs. Genitalia of male very like those 

 of Saturnia, save that the joints of supra-anal plate are not so diverging and not so acute. 

 The side pieces are essentially the same. Primaries with but 9 veins, 5 and 6 together from 

 the upper end of the cell, 7 and 8 on a long stalk from the subcostal. The venation of the 

 secondaries is as in Saturnia.] 



Generic characters. — Female antennae with long slender single pectinations, about one-third 

 as long as in male ; head narrower than in Saturnia; fore wing short ; broad, not falcate, outer edge 

 straight compared with Saturnia; outer edge of hind wing fuller, rounder, less bent ; abdomen not 

 banded with white. Markings differ in absence of bands, and in smaller ocelli. [From a separate 

 memorandum by Dr. Packard. It is uncertain whether he intended to recognize Calosaturnia 

 as valid, but as late as 1902 he published the opinion that it did not differ from Saturnia.} 



Imago. — -One <$ , one 9 . Head, body, and wings reddish brown; a broad transverse white 

 band behind the head on the front of the thorax. Abdomen not transversely striped (as it 

 is in S. carpini.). Fore wings short and broad, scarcely falcate, slightly flecked with fine 

 white scales; no crosslines or bands; uniformly reddish-vandyko brown; the veins are distinct, 

 the squamation being rather thin. The basal third of the fore wing is dusky, the outer edge 

 of the shade being irregular and passing into the ground color of the wing. Discal spot (ocel- 

 lus) rather large, round, centered by a small nude white scaleless streak on a black field, the 

 latter inclosed by a snuff-yellow ring of varying distinctness and width; this ring is succeeded 

 by a broad black ring inclosing a fine blue semicircular line on the outer side of the eye; this 

 half circle is not quite half a circle, and is more distinct in the 9 than in <? of my examples. 

 On the inside of the ocellus is an oblong white patch extending from the one side to the other 

 of the discal cell (in the 9 the white patch is twice as wide on the left as on the right wing). 

 An apical vestigial indistinct spot filling two cells. An outer deep madder red irregular patch, 

 with a blackish irregular shade within, the red almost reaching the edge of the wing, and a 

 diffuse mass of blue scales (perhaps foreshadowing the subapical ocellus of Samia, CaUosamia, 

 and Philosamia). 



Hind wings yellow-ochre, vandyko-brown at the base, the brown shade not reaching the 

 ocellus. An outer submarginal broad black band curving around to near the middle of the 

 costa, behind shading into the dark base, so as to inclose a roundish yellow central area, cen- 

 tered by the ocellus. Ocelli very slightly smaller than those of the fore wings (in <? of the 

 same size); the eye as in the fore wings, but in <? and 9 the yellow circle is smaller and the 

 outer black circle is wider, and there is no white patch on the inside of the eye. 



Under side of the fore wings ocher-yellow, base and outer edge of the wing brownish; 

 ocellus as above; apical spot red and black with some blue scales between the red and black 

 (the subapical ocellus of Samia and CaUosamia in embryo). Hind wings nearly all brown, 

 paler than above; a faint yellow area surrounding the ocellus, which is as above. Costal edge 

 of the hind wings white to a point opposite the ocellus. Body brown, legs and antennas 

 madder-red, the latter paler than the legs. 



Expanse of fore wings, S 55 mm.; 9 52 mm. 

 Length of body, £ 21mm.; 9 19mm. 



Geographical distribution. — Sonoma County, Cal., (United States Department of 

 Agriculture) . 



