Sept. 1897.] Dyar: On the White Eucleid^. 123 



ally into fleshy appendages of nearly equal length, the anterior ones a 

 little shorter. These appendages are constricted at about the centre of 

 attachment, the basal portion forming an elevated heart-shaped piece, 

 bearing seta i above, the terminal part forming a tapering horn with 

 seta ii at the apex. The lateral row of warts are rudimentary, consist- 

 ing of small, naked finger-shaped papillae, hardly larger than the spira- 

 cles. The subdorsal horns may be detached, but less readily than in 

 Phobetron, and they leave a slight scar, from which a very little fluid 

 exudes. The appendages are situated on joints 3 to 13, one more than 

 in Phobetron, and are directed downward so as touch the leaf and cover 

 the sides. The warts bear long, finely feathery fringe-hairs with smooth 

 bases, other short smooth hairs, short club-shaped feathered hairs and 

 the primitive setje i and ii. The skin is covered with a rather dense 

 coating of fine, short, pale hairs from large colorless tubercles. No de- 

 pressed spaces seen ; the skin is hollowed laterally, but in an ill- defined 

 manner. The warts are not shed on forming the cocoon. There are 

 no stinging spines. 



This interesting larva is colored to escape observation. The adap- 

 tation is the same as is Sisyrosea textida, but derived from a phylo- 

 genetically dissimilar stock. The fringing horns consist of the sub- 

 dorsal instead of the lateral series and the fringe hairs are feathered sec- 

 ondary setce instead of degenerated stinging spines. 



Affinities, Habits, Etc. 



The only close ally of this larva among our species is Phobetron, 

 and, quite unexpectedly, it is a very close ally. Dr. Packard, judging 

 from the moth, was of the opinion that it was not allied to Phobetron, 

 placing it near Heterogenea. I placed it still further away, in the Me- 

 galopygidse. The larva has all the essential characters of Phobetron, 

 even in some detail. The adaptation being different, the superficial 

 appearance is different, resembling Sisyrosea rather closely, but it really 

 has no near affinity with the spiny Eucleids. From Phobetron it differs 

 as follows: (i) the middle tubercle of joint 4 is absent; (2) the lateral 

 tubercles are reduced to insignificant papilla instead of existing as 

 small warts; (3) the subdorsal horns are all of the same length, the 

 weak segments of stage I appearing only in the coloration in certain 

 examples, which lack the red tips on the horns that are short in Phobe- 

 tron; (4.) there is a horn on joint 3 instead of a small wart; (5) the 

 color is green instead of brown, with a thinner hair coating. The larva 

 is more specialized than Phobetron on the whole. In the equal length 



