OF ARTS AND SCIENCES. 67 



those on abdominal segments 1 to 7, those being yellow. All the 

 bristles are jet-black, and there are none of any other color. They 

 are finely spinulated, the spinules rather dense ; they taper to the 

 acute end, and are clear and probably glandular. It is to be noticed 

 that the body is transversely banded with black ; that the dorsal tuber- 

 cles of the three thoracic and the last two abdominal segments are 

 already in this stage differentiated in color and size from those of the 

 first seven abdominal segments ; indeed, the larva is much variegated, 

 being showily banded, with great contrasts of color. 



Mr. Bridgham's specimens of Stage I. were observed on July 15, 

 and were fed on the sassafras and wild cherry. The second stage 

 was drawn on July 23d. 



Stage 11. — Length 10 to 12 mm. The head is not quite so wide as 

 the body behind the middle, being much smaller in proportion to the 

 body than before ; it is black, with a sinuous broad conspicuous whit- 

 ish (not yellow as in Stage I.) band passing across the clypeus, so as to 

 include the apex, and curving down towards the antennae. The ground 

 color of the body is whitish instead of yellowish, so that the transverse 

 black bands, though narrower, are more conspicuous than before. On 

 the 1st thoracic and 9th abdominal segments are two dorsal and two 

 lateral black tubercles, one as in Stage L, but on all the other segments 

 except the 10th abdominal the tubercles are now yellowish with black 

 spines ; all the tubercles are situated on the white portion of the body, 

 the black bands being situated between them. The single median 

 tubercle on the 8th abdominal segment is now yellowish, and distinctly 

 seen to be double, being very broad, and each side provided with a 

 crown of about five spines. There are five or six spines to each tuber- 

 cle, and many are black, and much shorter and stouter than in the pre- 

 vious stage, the outer ones being about as long as the tubercles bearing' 

 them are high, the central inner one longer. The round black spot on 

 the side of the anal leg differs from that in Stage I. in being curved, 

 boomerang-shaped. The thoracic legs are black, and the abdominal 

 ones pale yellowish. In this stage the dorsal tubercles on the 2d and 

 '3d thoracic segments are of the same size and color as those of ab- 

 dominal segments 1 to 7 ; the differentiation in size and color of the 

 four thoracic tubercles having not yet taken place. It is to be observed 

 that in Stage I. the dorsal tubercles on all these thoracic segments are 

 black, and the median one on the 8th abdominal segment is also 

 black. 



Bridgham's figure and Riley's specimen, from which the foregoing 

 description has been drawn up, agrees with Riley's description. 



