no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 25 



than 9 ; outer edge slightly concave. Hind wings tailed in J , the tail short and broad, two- 

 thirds as long as the antennae; in 9 the wing is wider, with a wide projection instead of a tail- 

 like one. 



Fore wings with a broad straight basal band composed of two white 'lines with a darker 

 brown line between. Extradiscal line similar, oblique, nearly parallel with the outer edge of the 

 wing, expanding where ending on the costa on the outer fourth of its length. The discal spot is 

 situated rather nearer the extradiscal than the basal line, and is a small opake white spot, larger 

 in the 9 than c? , the two lines also being wider and more diffuse. 



Hind wings with a narrow white indistinct discal spot, and beyond it is a curved extra- 

 discal whitish band widening on the costal and inner edge of the wing. 



Under side of the wings nearly as above, but the lines all less distinct, as also the discal 

 spots. A broad diffuse basal dusky line on the hind wings. All the lines are more distinct in 

 9 than <? . 



Expanse of the fore wings, a 70 mm. ; 9 80 mm. 



Length of fore wing, 3 34 mm.; 9 45 mm. 



Breadth of fore wing, cf 19 mm.; 9 25 mm. 



Length of hind wings without the tail, <? 25 mm.; with the tail, 31 mm.; breadth, 



20 mm. 

 Length of hind wings without the tail, 9 35 mm.; breadth 27 mm. 

 Geographical distribution. — Port Natal (Donckier; British Mus.). 



Larva. — Length, 45 mm. Head moderately large, nearly two-thirds as wide as prothoracic 

 segment, the black surface as usual with groups of from two to six fine granulations. Body 

 cylindrical but the segments convex and rising dorsally into two decided fleshy humps, one on 

 each side of the median line, and with corresponding lateral humps on which are situated the 

 low tubercles. Prothoracic plate thickened on the front edge, and on each side of the median line 

 is a group of seven to eight setiferous minute warts, the group being a vestigial setiferus tubercle; 

 also a more rounded area of warts corresponding to a vestigial supraspiracular tubercle, and 

 also low down, a group of warts corresponding to the infraspiracular tubercle. 



On the middle of the second thoracic segment is a double-headed hump with no valley or 

 depression between the two heads; each head crowned by a low vestigial tubercle bearing four 

 sette. On the third thoracic segment the hump is slightly higher, but with a little valley between 

 the tubercle, each bearing five setae. 



On abdominal segments one to eight the humps are separate, a valley between them, and 

 the setiferous flattened low tubercles, all wider apart. The humps on the eighth segment are no 

 higher and larger, but the two separate vestigial low flattened tubercles are quite near together, 

 though entirely separate; each bearing four or five setae. On the ninth abdominal segment 

 the humps are separated by a wide valley and the tubercles (each with five setae) are nearly 

 three times as wide apart as on the eighth segment. 



Suranal plate wide, triangular, slightly mucronate at the end; on the edge about a dozen 

 small setiferous tubercles on each side; two minute setiferous tubercles, one on each side of the 

 middle of the plate, and other smaller scattered one; the surface is not very rough, rather 

 smooth. The setae are moderately stiff, rather short, and they are all white. 



Anal legs with fine setiferous tubercles around the outer, front, and hinder edges. 

 Body pale straw-yellow, with transverse velvety brown-black bands extending from the 

 lateral line around over the back, the broad band extending from the hinder edge of one segment 

 to the front edge of the one behind; there are 11 such black bands contrasting with the bright 

 yellow ground color, the first and last of the series narrower and shorter than the others. 

 Farther down on the side before the pleural ridge is a row of 12 irregular conspicuous black spots, 

 the first one and last two much smaller than the others of the series. Spiracles yellow, not 

 easily distinguishable from the yellow surface of the segment on which they are situated. 

 Thoracic legs blackish; midabdominal legs yellow. 



This is a very conspicuously marked larva. It has retained the vestiges of humps and 

 tubercles and the setae are well developed. It appears to be a normal Sphingicampid some- 



