281 



spiracles black; head red; two spines on the head, four on the second sef- 

 ment and two on the last, black; the remaining sjiines whitish, tipped with 

 black ; all but one of these larvas became pupa; on Aug. 25. 



Another caterpillar diff'ei'ing a little from the preceding, with yellow or 

 ferruginous sjiiucs. The number of days this species remains in the pupa 

 state is from eleven to fourteen. Chrysalis with a very large and thin, nose- 

 like projection, and eight silvery spots on the body. 



Imago obsen-ed Oct. 1, 1820, Sept. 1, 1827, May 1, 1828, Aug. 1, 1834, 

 Oct. 10, 1836, Aug. 1, 1839. 



Hesperia sp. 



July, 1830. Found thi'ee larvs8 on the Lespedeza cctpitata; solitary, fold- 

 ing and fastening the leaves with silk. Head large, round; flatte^ied ante- 

 riorly and behind slightly cordate, or indented on the vertex; blackish, 

 granulated, hairy, without visible eyes. First segment, representing the 

 neck, with a narrow, transverse, blackish line. Body pale green, granulated, 

 with vei-y short erect hairs; a pale longitudinal line each side of the back, 

 from neck to tail, and an inconspicuous, darkish green, dorsal line. First 

 pair of feet black, remaining ones green. Length six tenths of an inch. 



By the last of July, one of them had become pale reddish, with very 

 minute blackish dots, a dark dorsal line of contiguous blackish dots, and a 

 pale reddish, lateral one, immaculate. Neck with a transverse black band. 

 Head and first pair of feet black. Length nearly one inch. 



Smerinthus juglandis Sm.-Abb. 



In Julv, 1827, found a larva on the black walnut resembling Abbot's 

 figure in some respects. Head acuminated and minutely bifid above; body 

 very small before, thick in the middle, gradually smaller behind, pale blue 

 green, covered or rugose with minute tubercles or granulations, which at 

 the sides are in a regular series corresponding with the oblique, whitish 

 lines; these white lines are formed rather by a series of granulations more 

 white than the rest; tail rugose also. This larva resembles somewhat that 

 of Snier'mihus myops Sra. -Abbot. It is remarkable for the squeaking sound 

 which it emits, apparently by rubbing the rings of the anterior part of the 

 body together. Entered the earth Aug. 7, 1828. 



