118 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



vein. The disrul veins an? very ol)li(jue. wliere tliey are straiglit in Citheronia: in the liind 

 wings the ol)li(iuity of the diseal cells and elony-ated shape of the discal cell are more marked 

 than in Citlieronia. 



Fore Ipo-s with tlie tibia tiiieker, wider than in Citheronia: the tibial ej)ipiiysis beinji- very 

 wide (tiufs. -21, 21a). more so than in Citheronia. 



Coloration: Bod\- and wings yellow; winiis with pale lilac blotches and spots; more or less 

 detinite discal spots and extradiscal line. 



Ziu'iy/. — Body armed with short, stout spinose dorsal Imrns (in second and third thoracic 



Fig. 15. Ltistributiuii uf the guuus Kacl 



segments, liut none on the j)rothoracic segment; caudal horn very short; a \ estigial median spine 

 on ninth abdominal segment. Hody with long hairs. No bands or stripes. 



Larva — Stat/c I. — Body armed with two dorsal branching prothoracic spines one-half as long 

 as those of the dorsal series of the two thoracic .segments behind; they ai'e deeplv forked, not 

 ending in a bulbous e.Kpansion. Body transversely banded. A high caudal horn, and one half 

 as high on the ninth segment: and a ."'-headed spine on each side of the suranal plate. The 

 horns become spinose after the liist nmlt. the bod\- being clothed with hairs after the third molt. 



PujM. — Body thick; ma.xilhe long, over three times as long in proportion as in Adeloeephala 

 and Anisota: <'remaster stoutei' and a little shorter, and the spines over the body smaller in 

 proportion than in the two genera named. 



