218 A Classification of Leindopterous Larvse. 



uniform, soft, and smooth. Color greenish-brown, lighter, more 

 reddish posteriorly, shaded on the dorsum with dark orange ; a 

 number of indistinct, brighter, waved lines. Venter colorless, 

 bordered by a salmon colored band. 



Second Group. 



Phobetron pithecium Abbot and Smith. 



In this larva, the tubercles still remain, but the whole organism 

 is modified to resemble a dead leaf. It is the most remarkable lepi- 

 dopterous larva known to me. Its hairs retain some stinging power.^ 

 The tubercles are most peculiarly modified; they are extended later- 

 ally in the form of long fleshy arms, the tips of which are flexible 

 and execute a certain amount of independent motion ; they are 

 strongly constricted at the base, and are shed by the larva at the 

 time of forming its cocoon, though not at the molts. Moreovei- 

 their normal position is altered. Instead of arising from the center 

 of the segment, they are pushed forward to lie apparently between 

 their own segment, and the one anterior. On account of their feeble 

 attachment, they may be lost during the life of the larva through 

 accident, and are not regenerated, as would be the case with hair 

 structures which are formed afresh at each molt. . 



Head whitish, eyes black, jaws black inwardly. Head below joint 

 2; but 2 not below 3. Dorsum fiat, rounding posteriorly, the sides 

 perpendicular ; subdorsal ridge rounded, but bearing a row of ten 

 processes on joints 4 to 13 respectiveh^, arising apparently from 

 between the segments subdorsally, the first between joints 3 and 4. 

 All are curved backward, except the 6th to 9th, which curve for- 

 ward, though they probably vary in this respect, owing to their 

 power of motion. The 2d and 8th (joints 5 and 11) are longer 

 than the 1st, 4th, 6th, and 9th (joints 4, 7, 9, and 12), and the 10th 

 (joint 13; is very short. The 3d, 5th, and 7th (joints 6, 8, and 10) 

 are very long.^ All are furnished with thick short hair, parted in 

 the middle and projecting laterally, and have a tuft of black spines 

 and single long hair at the end. Their bases are swollen below and 

 hairy. From the base of each process above, grows a spreading 

 flattened tuft of fine hair which nearly cover the dorsum. A super- 

 stigmatal row of spined tubercles, three in number on joint 3 (one 



1 See Lintner, 5th Report N. Y. State Entomologist, p. 183. 



2 In tlie specimen which served me for these notes the 3d pair had been lost. 



