19, 2 Wileman: Japanese Lepidoptera, VI 217 
imagoes of Caligula jonasi from similar larve on September 21, 
29, and 30, and October 1, at Hakodate. Pryer states that “the 
larva feeds on cherry and that it resembles a small Caligula 
japonica.” 
Staudinger comments on the larva of Saturnia boisduvali 
Eversm. (? var. jonasi), as follows: 
The yellow green (preserved) larve are covered with very short, bristly, 
yellow hairs, with a few, long, dark hairs, especially on the anterior seg- 
ments. When young they have a broad, black, dorsal stripe with orange 
warts. They appear to differ a great deal, for Oberthir describes them 
in Ann. Soc. Fr. (1886), p- XLVI, as “black, with two red dorsal spots.” 
They make a light lattice-like cocoon which resembles those made by the 
larve of Saturnia caecigena, with which they have some resemblance, and 
the moth appears, as in the case of caecigena, in autumn (September). 
The six, paired, dorsal spots of my young larva of Caligula 
jonasi are red as described by Oberthiir, not orange as described 
by Staudinger,’ who, possibly, is speaking of the Amurland 
geographical form, subspecies fallax Jordan (not named by 
Jordan at the time the larva was described by Staudinger). 
Nawa" states that— 
Jonasi hibernates in the ovum stage and the young larva emerges in 
May. The full-grown larva spins up and pupates, after the fourth ? or 
fifth ? molt is completed, about the middle of June and the imago emerges 
about the middlé of October, when the female oviposits. 
The larva feeds on nashi, pear [Pirus sinensis Lindl.]; ume, plum 
[Prunus mume S. and Z.]; keyaki [Zelkowa acuminata Lindl:]; midzuki 
[Cornus macrophylla Wall]. At first it is black with tubercles on each 
Segment which emit black and gray hairs; legs black; prolegs grayish 
yellow; when it grows in size the head becomes deep green and the body 
light green, dorsally tinged with white; the subspiracular line becomes 
light green; and the ventrum grayish green; spiracles chestnut color; 
the hairs of the subspiracular series of tubercles very long when full- 
grown. 
Oberthiir gives as food plants in Manchuria [? Amurland] 
Betula; Prunus; Pirus baecata Linn. [found and known in 
Japan as var. manchurica Maxim., under the Japanese names 
of ko-ringo, beniringo, aka-ringo]. Sasaki ** gives descriptions 
and figures of the young and adult larva, cocoon, and male imago 
of Caligula jonasi. He says: 
The larva emerges about the month of June and feeds upon 6nara, 
oak [Quercus crispula Blume]; gamazumi, [Viburnum dilatatum Thunb.]; 
* Rom. Mém. Lép. 6 (1892) 326. 
™ Insect World (Konchi Sekai) 10 (1906) 191. 
“Insects Injurious to Japanese Trees [Nihon Jaimoku Gaichihen (Jap.) ] 
ed. 8 ( 1910), pt. 2, 34, pl. 92. 
