Packard] ""J [Feb. 3, 



spot, and a much larger second one between the first and second pair of 

 small tubercles, which is a deep rust-red or brown-madder sipiarish ur 

 oblong patch ; a similar one lies between the fourth and fifth tubercles, 

 and a fourth smaller, more rounded one between the first and second 

 pairs of the large terminal tubercles. At the end of the body are three 

 pairs of high conical tubercles like those in front. The two anterior pairs 

 are the largest, and those of the posterior pair project out horizontally 

 backwards and are green, the others being yellowish. In tlie green 

 median dorsal space is a pale median dorsal line, edged distinctlj^ with 

 black, and the sides of the area are edged with black, and dilate near the 

 base of the tubercles, forming black blotches. 



The outer side of the subdorsal ridge is edged with black in the same 

 way, and this system of black marks connects with a lateral series of polyg- 

 onal nearly circular black rings on the vertical sides of the body, and 

 each enclosing two pale, depressed, oval, green areas. There is a lateral 

 series of nine green, long, slender, pointed, spinulate tubercles. Nearly 

 each tubercle on the upper side bears a large pale brown patch like amass 

 of sand (under a high-power Tolles' triplet I cannot discover the nature of 

 this sand-like mass, which is wanting on the first two and last one). At 

 the end of the body are four conical, high, deep black pencils of fine 

 hairs ; one between the last and penultimate subdorsal tubercle and an- 

 other in front between the penultimate subdorsal and last lateral tubercle. 

 On the first thoracic segment are a few fine hairs ; it is green and not 

 spotted. The head is green, witli the mouth-parts dark. Fig. 4 repre- 

 sents a dorsal tubercle with its spines ; it is perhaps from too old a speci" 

 men to show the unicellular poison glands at the base of the spines ; »., a 

 single forked minute spinule ; ct., the cuticle at the base of the tubercle 

 containing clear roundish spaces with a raised edge. There seem to be no 

 caltrops or minute spines in the cuticle of this genus. 



Two specimens living on the oalv were received from New York through 

 Mr. Simpson. One of them is colored as usual, but the subdorsal madder- 

 brown or reddish squarish spots between the papulae are dull and rather 

 faint. The other, larger, is quite diiferent in color from normal individu- 

 als. The body and dorsal papulaj instead of green are dull orange-red- 

 dish, while the reddish patches between the subdorsal papuUeare faint and 

 smaller than usual. The network of what are usually black lines on the 

 sides is rather reddish. The polygonal lateral areas include an upper 

 often dumbbell-shaped pile spot, and alowerdouble pale spot, the oblique 

 oval spot being supplemented by a pale dot just below and in front. The 

 posterior black conical tufi of hairs is much larger than the lateral ones in 

 front. 



It began to spin a thin cocoon September 14. 



Two full-grown larvae, apparently of this species, were found August 1, 

 on the back of a pear tree and received from J. H. Pearson, of Ports- 

 mouth, N. II. I will copy my description : Body oblong, flattened 

 beneath, couve.v above, with a slight subdorsal ridge on each side of the 



