18G Journal New York Entomological Society. [Voi iv. 



ate in the later stages, their piercing caps being partly replaced by setae. 

 Those on the red anterior edge are shortened and darkened by black 

 pigment. The arrangement of the horns is normal for the spined Eu- 

 cleids, a single segmentary subdorsal row on joints 3 to 13 and single 

 lateral row on joints 3, 4, 6 to 12. In stage I the horns are surmounted 

 by a central swollen -tipped seta and a small series arranged around it in 

 a radiating circle. Skin covered by a series of curious wavy folds which 

 extend on the horns also, but less distinctly. This structure is unique 

 and its origin obscure, though it seems to be produced by the ordinary 

 skin granules becoming concave and their raised edges confluent. 



Depressed spaces represented by whitish rings with dark centers, 

 fairly well developed; (i) and (2) are situated closely in line in the 

 small dorsal space, both paired; (4) and (6) are situated on the pos- 

 terior half of the segment in the lateral space in two small areas devoid 

 of green pigment, which are connected narrowly along the incisure; (5) 

 is small and round, situated below (6) just above the base of the lateral 

 horn toward the front edge of the segment. Subventral space without 

 distinct marking. The spiracle on joint 5 is situated above the line of 

 the lateral horns, nearly uniform with the white spots (5); those on 

 joints 6 to 12 are below the horns, well hidden in the retracted sub- 

 ventral space. No caltropes or detachable spines are present. This 

 highly specialized larva departs widely from its congeners in many re- 

 spects. Its form is unique and its skin structure much more specialized 

 than any of the other spined Eucleids. The horns are nearly equally 

 developed, and in this respect the larva is more generalized than its 

 allies, as also the presence of more than three setas on the horns in stage 

 I, indicating less advance in the degeneration of this stage. The 

 peculiar lateral direction of the horns is somewhat paralled in Phohetron, 

 though this does not indicate any close relation between these insects, 

 since the hairs are in one case primitive setae and in the other degener- 

 ating spines. The coloration is protective, and together with the peculiar 

 shape enables the larva to escape observation to a sufficient extent. 



Affinities, Habits, Etc. 



With the possible exception of S. ?iasoni, the larva of which is un- 

 known, the present species has no near allies in our fauna. Belonging 

 as it does to the spined Eucleids, its origin may be traced to the South. 

 Not improbably this type of larva will be found to occur in the tropics 

 of America, but at present I know of none. 



S. textiila is single brooded. The moths emerge rather late in the 



