March, I9i6.] BiRD: XanTIICECIA BUFFALOENSIS. 89 



stricted above the mouth-parts which seem produced; cervical shield 

 darker, shaded at sides; tubercles prominent, blackish, I and II on 

 twelve but slightly larger than the preceding ones ; anal and leg plates 

 blackish; body color pale brownish, livid, with a purplish-gray luster; 

 the narrow dorsal and sub-dorsal lines pure white, continuous, or 

 nearly so, the latter being broken into a series of dashes as it crosses 

 joints four, five and six ; a broader subspiracular line on two and 

 three, then broken at the girdle, then continued vaguely on the ab- 

 dominal segments. 



Stages IV, V. — Similar. 



Penultimate Stage. — Little change, paler ; head now more rounded, 

 clypeal suture prominent ; tubercles generally larger than the spiracles, 

 on the abdominal segments V is an elongated oval plate larger than 

 the others, VI also being notably defined; on ten IVa has not ap- 

 peared. 



Maturity. — Very cylindrical, color and markings lost in a whitish 

 translucence ; tubercle now more prominent by contrast, on joint ten 

 IVa develops with the examples under observation, the most indi- 

 vidual feature being the elongate character of V which is about four 

 times the size of the spiracle, on eleven III and IIIo are separate, 

 whereas they were formerly confluent ; anal plates blackish ; length 

 48 mm. Much disparity exists with individuals attaining maturity, 

 early examples finishing the latter days of July, while tardy larvje 

 may be feeding all through August. 



The pupa is very cylindrical, light brown, a protuberance at 

 clypeus projecting at a right angle as aligned with the ventral surface 

 and the frons; the cremaster is a slight thickening of the chitin, flat- 

 tened ventrally, supporting two small spines, set well apart and some- 

 what convergent; above these another smaller spine in the same 

 dorsal alignment; length, 22 mm. The pupal period seems about four 

 weeks. 



That an unspotted variation of the moth existed with this species, 

 a parallel to what frequently happens with Papaipema, was previ- 

 ously known and breeding developments indicate this is quite as prev- 

 alent as the type form. In this instance there is less indication of 

 generic position, so well suggested by the white spots, nor is there 

 the prominent anterior crest which is a character for placing the un- 

 spotted allies. Superficially this form might easily lead one astray. 



