PACKARD. — TRANSFORMATIONS OF SATURNIAN MOTHS. 559 



8th abdominal segment dark green, fully as large as the thoracic ones, 

 and bearing five distinct peripheral and one central black seta (their 

 stumps being present, probably broken off while being inflated ; they are 

 faintly seen in the penultimate stage). Tubercles of the supraspiracular 

 row minute, smaller than the dorsal ones ; those of the infraspiracular row 

 larger, and still armed with 7-8 black setae. It differs from the larva 

 of R. orizaba from Mexico in having uo definite hairy lateral yellow 

 ridge. 



Suranal plate small, rounded behind, with a few small fine hairs and 

 bearing a large central bright red rugose spot; the lower edge yellow ; 

 on the sides of the anal legs a little larger triangular spot of the same 

 color. Spiracles black, very conspicuous. Segments smooth, and with 

 a pale yellowish band or incomplete ring (8 in all) in front of each 

 spiracle. 



Thoracic legs pale, black at the end, 1st and the 3d joint entirely black. 

 Mid-abdominal legs green, a yellow patch above the planta, broadly 

 bordered with black, and the planta black. 



Described, as are the other stages, from blown specimens. 



It differs in this sta^e from the larva of R. orizaba in the abundant 

 hair-like setae on the lateral ridge, and in the red spots on the suranal 

 plate and side of the anal legs. In its armature it differs from that 

 species. 



Cocoon. — Oval, not much larger at one end than at the other ; the 

 stalk very slightly developed. Length 53 mm., thickness 21 mm. 



Pupa. — Of the form of Cynthia, but not so thick ; of the usual chest- 

 nut brown color. Length 28 mm., thickness 13 mm. 



£> 



Rhodia fugax. 



The eggs, received from Japan, were hatched April 27, and the larvae 

 described on the 28th. It feeds on the poplar and dwarf willow. 



Larva. — Stage I. Length 6 mm. Head large, wider than the body, 

 with long scattered hairs ; brown-black with a transverse whitish patch 

 on the clypeus-anterior, while the base of the antennae is of the same 

 color, so that across the front of the head extends a broken whitish in- 

 conspicuous line. The body, as usual in freshly hatched Saturnian larvae 

 before the larva has taken food, tapers to the end. 



The dorsal tubercles are distinct, a little longer (or higher) than thick, 

 those on the thoracic segments larger than the abdominal ones : those on 

 the prothoracic segment about half as large as those on the 2d thoracic 



