the beginning of September, at which last time I have also met with 

 a specimen only half the length of the full-grown specimen. 



The pupa (from the pupal integument) is cylindrical, suddenly 

 rounded at the head, and tapering a little in the two last abdominal 

 joints ; the color is a very pale, semi-transparent, yellowish brown. 

 The mouth is represented by six tubercles, hexagonally arranged, 

 above which, upon each side, is a trigonate, three or four-jointed an- 

 tenna, pointing outwards. The pronotum commences immediately 

 behind the antennae, and bears on its anterior dorsal submargin a pair 

 of reniform, tubercular spiracles. The mesonotum, to which the wing- 

 cases are attached, is twice as long as the pronotum, and bears on its 

 anterior dorsal margin a pair of obliquely-placed, reniform, tuber- 

 cular spiracles, three times as long as the prothoracic ones. Then fol- 

 lows a very short metanotal piece, about one-seventh as long as the pro- 

 notum, bearing no spiracle, which is succeeded by eight subequal seg- 

 ments, all but the last bearing on their lateral dorsal surface a sub- 

 basal, round, tubercular spiracle. The first of these eight segments is 

 simple, and extends to the tip of the wing-cases ; * the others are all 

 furnished two-thirds of the way to their tips with an annulus of ap- 

 pressed bristles directed backwards. The anal thorn is very robust, 

 having a diameter of one-half the last abdominal segment, and is 

 squarely truncate as soon as its length is half its width, and terminates 

 in six small, robust thorns, arranged in a reo-ular hexagon. Length .97 

 inch; greatest diameter .21 inch. One specimen. 



Midas fulvipes, n. sp. ? d Black. Epistoma (rhomboidal piece 

 beneath the origin of the antenna), dark rufous with dense fulvous 

 hairs ; antennte dark rufous. Thorax opaque, a little rugose, with 

 scattering erect hairs. Abdomen and venter polished, glabrous, with 

 fine short appressed hairs. Legs with the knees, tibiae and tarsi ful- 

 vous. Wings black on the costa, shading into palish fuscous on the 

 terminal and interior margin ; no metallic or colored reflections. Length 

 d .89 inch. Expanse d 1.70 inch. One d- ? unknown. Easily 

 distinguishable from clavatus Drury, of which I took numerous speci- 

 mens in South Illinois, but which does not occur near Rock Island in 

 North Illinois, by the particolored legs and the immaculate abdomen. 

 Baron Osten Sacken informed me that this insect " seems to be new, 

 and is certainly new to him." 



The larva of what I suppose to be the 9 of the above is, when nearly 

 full grown, from 1.50-1.75 inch long, and .31 inch in its greatest diam- 

 eter. The head is of a polished mahogany-brown color, pointed and 

 thorn-like, being about .10 or .11 inch long, and .03 or .04 inch in 



* I believe this first spiracle-bearing segment to be metanotal, as also the cor- 

 responding' piece in the pupa, of Midas fulvipes, u. v. 



