114 



give off [pale yellow hairs curving downwards. On the posterior 

 edge of the last segment are four bluish white tubercles giving rise 

 to black spine-like hairs. The spiracles are oval, pale yellow, and 

 encircled with black. The legs are dark crimson, and tlie prolegs 

 flesh colored and streaked with reddish brown. They are subject to 

 some variation in the ground color, as seen in plate I, figs. 6 and 7. 



The Pdpa. 



The pupae of the males vary in length from three-fifths to four- 

 fifths of an inch, including the cremaster or blunt spine at the end of 

 the abdomen ; while those of the females vary from three-fifths to 

 one and two-fifths inches. Fig. 5, plate I, was taken from one of 

 extraordinary size. The following description was made from the 

 study of thirty-nine males and one hundred and twenty-one females. 

 They vary in color from chocolate to dark reddish brown. They are 

 cylindrical or fusiform, rounded anteriorly and tapering posteriorly 

 to the cremaster which is armed at the tip with a cluster of minute 

 hooks. The covers to the various parts of the body, as the wings, 

 legs, antennae, etc., are plainly marked, those of the antennae being 

 very wide, especially in the males. At the front edge of the thorax, 

 on each side, is an oval, dark reddish brown velvety spot very 

 distinct in some examples, but nearly invisible in others. Ocher 

 yellow hairs arranged in groups occur on the eye, head and palpi 

 covers, across the collar and thorax, and in ten equidistant lows 

 along the abdominal segments. Some of the hairs in the groups 

 across the collar and thorax are dark brown. The abdominal seg- 

 ments are more or less punctured, and the hairs arise in small circles. 

 At the base of the cremaster on the venti-al side is an elliptical 

 depression with curved ridges on each side. In the males, on the 

 middle of this segment, in front of the depression, is a small raised 

 tubercle with a longitudinal slit on the top of it ; while in the females 

 this tubercle is wanting, but on the extreme front edge of this same 

 segment, there is a fine longitudinal slit ; but the surface at this place 

 is not raised. 



The Imago. 



The following description was made from thirty males and thirty-seven 

 females. The males measure from one and one-half to two inches 

 between the tips of the expanded wings. The ground color of all the 

 wings is brownish yellow varying in intensity in different examples, 

 but somewhat lighter beneath. The head, thorax, antennae and 



