no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 49 



Larva. — An alcoholic specimen, well preserved, from Sierra Leone, West Africa, presented 

 to the American Museum of Natural History, New York, by Mr. William Schaus. Length, 

 45 mm. (This is evidently in the stage, before the last, as the two wahlbergi are nearly twice 

 as large.) 



Head rather large, rounded, black, with irregularly but densely scattered fine papillae, in 

 groups of about 3 to 10; none on the clypeus or about the mouth parts, jaws, etc. Body black- 

 brown armed with large, stout sharp spines. Prothoracic collar large, unarmed, shining black. 

 Below it, directly in front of the spiracle, is a low flattened tubercle, the surface polished and 

 bearing four to five setiferous papillae. Farther down over the base of the prothoracic legs is a 

 higher tubercle, but still not so high as broad, and bearing four to five slender setae. 



The spines are as usual in eight rows, the dorsal ones of the basal and middle abdominal 

 segments as large as the thoracic ones. They are all large, deep honey-yellow in color, very 

 sharp, curved backwards, and bear from four to six long slender pale setae, arising from promi- 

 nent papillae. 



The median spine on the eighth abdominal segment with a distinct impressed line behind, 

 and distinctly double at base, deeply forked for one-third of its entire length, i. e., on its distal 

 third. 



The spines of the lowest row are deep honey-yellow like the others, and are low, conical, 

 with the surface polished, except two on the ninth abdominal segment, situated directly in front 

 of the anal legs, which are more acute and longer. 



Suranal plate large, shining black, the edge somewhat thickened, regularly rounded behind; 

 the surface not armed with tubercles or vestiges of them. Anal legs large, triangular, black. 

 Thoracic legs and middle abdominal legs black. 



This has the generic characters of the larval Cyrtogone, whose imago is so much more 

 specialized. It differs in having no white flattened minute tubercles. The median eighth 

 abdominal spine is forked in the same way and fully as deeply divided, in fact a little more so. 



NUDAURELIA WAHLBERGII (Boisduval). 



Plate XXXII, fig. 4; XLVII, fig. 2 (N. anthina); CVI, figs. a-c. 



[See synonymy under N. dione. Rothschild (1895) treated N. waMbergii as a distinct 

 species, with anthina (Karsch) and jlavescens Rothschild (from Accra) as subspecies. Dr. 

 Packard's latest opinion was that wahlbergii should be placed under dione, but the account 

 given below is left as originally written.] 

 Saturnia wahlbergii Westwood. 

 Antherea dione, var. wahlbergii Herrich-Schaeffer, Samml. Aussereur, Schmett., p. 61, fig. 95, 1854. 



Judging from Herrich-Schaeffer's figure this species differs from A. cyiherea by the wings 

 being more ochreous, the discal ocelli being round, not encircled with white, while the extradiscal 

 line is more decidedly scalloped, otherwise it may prove to be a climatic variety of N. cyiherea. 

 It is certainly a A T ery nearly allied species. 



Larva. — Length 80 mm. Head and body black, like N. dione in all important respects, 

 i. e., in the shape of the body and length of the spines. Prothoracic collar and its armature 

 as in N. dione. Dorsal spines of the same shape and length from the second thoracic to the 

 eighth abdominal segment ; those of the second thoracic segment darker than the others, which 

 are bright reddish copal or honey-yellow; the spines of the infraspiracular and lower row of 

 the second and third thoracic segments are black, while those of the infraspiracular series on 

 abdominal segments 1 to 8 are reddish, and the area around the base is reddish. 



Compared with N. dione from Sierra Leone the surface of the head is a little more densely 

 granulated, and the suranal plate is rougher on the surface and is submucronate at the end, 

 instead of being well rounded. Anal legs the same in the two forms. Around the base of the 

 spines the skin is reddish, or with a yellowish red tinge. The median spine on the sixth abdomi- 

 nal segment rises from a transverse low reddish ridge, at each end of which is situated the 

 supraspiracular spine. The spines each bear from four to six long white sharp spines, the 

 points of which are sometimes slightly dark. 

 83570°— 14 4 



