Packard.] J-" [March 17, 



Note. — Being now somewhat more exposed when feeding, the head has 

 become of a bright cherry red color, and the body more striped ; the arma- 

 ture is longer and sharper, except the two most conspicuous horns of the 

 second thoracic segment. 



Final Stage. — Lenglli, 35 mm. Tiie liead is considerably narrower than 

 the body, of a uniform pale clay oclire yellow. Tlie prothoracic segment 

 is armed with eight black tubercles arranged in a row across the front 

 edge, the lowest one being placed just above the insertion of the legs, 

 and being acute, while the others are more rounded and buiton-like. 

 The second thoracic segment bears two dorsal slender black horns, one- 

 half as long as the segment itself is wide, slightly tapering from the base 

 to the end, which is rounded and somewhat truncate. The third thoracic 

 segment with four black conical tubercles like those on the first segment. 



The eighth abdominal segment is provided with three black tubercles 

 on each side ; the lowest one on this and the seventh segment being 

 larger and sharper than the corresponding ones on segments 1-6. 

 The ninth segment is furnished with a median sharp tubercle, apparently 

 of double origin, as it is slightly forked at the tip ; it is about two-thirds 

 smaller than the lateral ones. 



The suranal plate is triangular, with the surface flat and rough, ending 

 in two black conical spines, with three on each side in front (in one 

 example two are wanting on one side, and the corresponding ones on the 

 other side are white). 



The body is pale pea-green, washed with white on the back between 

 the seven dark-green stripes, one dorsal and three on each side, which 

 are wider and diffuse. The thoracic legs are pale tlesh, the abdominal 

 ones greenish. Anal legs large, triangular, rough and granulated, with 

 a few black and white conical spmes on the edge above the planta. The 

 fleshy lateral ridge is well developed and washed with a reddish flesh tint 

 on the eighth and ninth segments. The spiracles are jet-black and are 

 conspicuous. The body beneath is as deep, if not deeper green in hue 

 than on the upper side. 



Life History of Anisota senatoria (Abbot and Smith). 



The larvae hatched August 1 and 2. 



Stage I. — Length, 3.5 mm. Head large, round, smooth, wholly black, 

 a little higher than wide ; when seen from in front a little wider than the 

 body. Prothoracic segment a little wider than the second thoracic seg- 

 ment, smooth, unarmed, but with a transverse dusky patch extending 

 across it. The second thoracic segment bears a pair of high clavate spines, 

 which are a little longer than the head is wide, and each bearing two ter- 

 minal bristles of unequal length. The spines are black, being of the 

 same color as the thoracic legs. The body is wholly greenish yellow, with 

 long, rather pale, yellowish-brown hairs arising from conical tubercles. 

 The end of the body is a little more yellowish than towards the head. 



