128 MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



into I'ings inclosing wliitish spaces. Four straw-yellow dorsal bauds, varjing from wliitisli 

 to straw-yellow, aud inclosing three narrow, broken chocolate lines. Below the broad lateral 

 chocolate band are two whitish yellow irregular lines, one just above and the other Just beneath 

 the spiracles. Underside of the body with the abdominal legs jiale livid-gray. On the outside 

 of the abdominal legs above the planta is a dark chocolate brown patch. Suranal plate dark 

 chocolate brown. The hairs are sparse and pale gray, uneven in length; the few longest ones 

 arise from the thoracic segments and from the eightli to nintli abdominal segments. The piliferons 

 warts are yellow on the yellow ground and brown on the brown portions of tlie skin. On the 

 eighth abdominal segment are two yellow piliferous tubercles situated on the brown skin. 



It molted June 22, 



It seems to be like the Eastern apicalis (van) in Stage III. 



Stdffe III. — Length, 15 mm. Head chitinous brown, mottled with close set dark spots. 

 Prothoracic shield divided into two parts by a pale median space. In general as in Stage II, 

 but the four pale dorsal lines are ichiter than before, becoming straw-yellow around the bases 

 of the yellow piliferous warts. The brown lines aud lateral band and the brown swollen first and 

 eighth abdominal segments are as before. Hairs long whitish. On the brown bands and .segments 

 the piliferous warts are pale, not jnominent. 



The larvae have now sewed together two leaves and live between them much as does 

 I. inclusa. 



The larviC molted into the last stage June 28 to July 12. 



The larva when of this stage is more like I. inchisa wlien about 1.5 7nm. long tlian the fully 

 grown Eastern apicalis {vau), though in /. inclusa the eighth abdominal segment is not brown, 

 according to Bridgham's figure, aud is somewhat as is albosigma in its third stage. 



Last stage. — Length, 30 mm. Body thick and full. Head not so wide as the body by a fifth; 

 pale yellowisli brown or chitin colored, mt\\ darker flecks; it is much flattened in front, the 

 clypeus flat and sunken. Jaws and ocelli Idackish, contrasting with the light-colored head. 

 Body of a peculiar light yellowish sienna-brown, with a grayish tinge. Skin somewhat rough, 

 with fine minute wai'ts giving rise to fine close-set pale gray hairs of unequal length. On the 

 prothoracic segment are two dusky dorsal flattened low warts elongated transversely, the 

 corresponding ones on the succeeding segments being bright yellowish brown, each giving rise to 

 one or two long thiclc pale hairs. A lateral j'ellowisli brown wart in front of the prothoracic 

 spiracles. On the second thoracic segment are three yellowish brown warts on each side, forming 

 a transversely straight line of six warts crossing the segment. On the third thoracic segment is 

 a transverse row of eight simihir warts, the additioiuil ones being one just above the base of 

 each leg of the third pair; corres])onding warts are present on the prothoracic segment. Xo 

 trace of a hump or of any other distinctive mark on the first or eighth abdominal segments, but in 

 place of them are two small yellowish brown warts, situated just in front of the line of six ivarts 

 common to all the abdominal segments, though there are two similar but much smaller, nearly 

 obsolete, warts which occur in the same position as on the other abdominal segments, those on 

 the second abdominal segment being the most distinct. Three faint broken parallel dorsal lines 

 and a faint lateral spiracular band, above and below which is a faint whitish line. The skin is 

 covered with somewhat irregular confluent colorless spots of irregular shape. All the legs are of 

 the same color as the body. 



It pupated l)etween the leaves July 12. 



Yslv. bifiria Etlw.ards. 

 PI. Ill, fig. 8. 



Var. Ichlhi/iira bifiria H. Edwards, Eu't. Americana, ii, 167, December, 1886. 

 Pack., Ent. News, iv, p. 79, March. 1893. 



The single type diflers from 'Slv. Edwards's type of brucei in the oblique silver-white costal 

 streak being more sinuous, as is also the line across the wing ^vhich forms the continuation of the 

 streak. On the other hand, the other (inner) arm of the V is straight, not sinuous, the inner two 

 lines about the same. The submarginal spots and streaks are the same in both .species. 



