— 73 — 



tilt' thoracic segnifiUs, whitli is continued u|)on tlie base of the 

 licad, which bears a broatl triangular tiark s|)ot. Ikdiind the ist 

 al)d()niinal hunij') is a long triangular tlesh-colored dorsal band ; on 

 the 5(1 abdominal segment is a shorter similar |:)atch, while a 

 similar carnecnis band on the 4th segment breaks up into three 

 iliverging stripes ending at the suture. The V-shaped dorsal spot 

 on the 6th and 7th segments is faded pink edged with clay-yellow, 

 and dark brown, .\long the abdominal segments is a narrow dark 

 supraspiracular line. I'he thoracic" and abdominal legs are, like 

 the body, pale, with reddish lines. . 



I'he ajiparent aim or rather the result of the action of the 

 environment has been to j^roduce a caterpillar whose shape and 

 lolor represent a sere, brown, more or less twisted portion of a 

 serrated leaf such as that of a beech, hornbeam and similar trees. 



It differs from anv other sjiecies known to me in lacking anv 

 green color on the thoracic or other segments of the body. 



Hyparpax aurora Ahbot and Smith. 



The young were reared from eggs kindly sent me June 26, 

 by .Miss Kniily L. Morton of New Windsor, N. V. 



Larva, s/ax'r I. — Length, 2.5 mm. 'i'he head is very large antl 

 broad, about twice as witle as the rather slender body, and dull 

 honey-yellow or chitinous in color; with a few long light hairs in 

 front near the vertex. On the prothoracic segment are two rather 

 large acute conical dorsal tubercles, of the same color as the head, 

 and larger than those on the ist or 8th abdominal segments^ 

 though all the dorsal tubercles on the body are unusually large, 

 larger in proportion than in the ist stage oi Sc/iizura ; those on 

 the 2d and 3d thoracic segments are well developed, but consider- 

 ably smaller than those in front. Those on the ist abdominal 

 segment are situated close together, while those on the ist 

 thoracic segment are rather witle apart. The two on the 8th 

 abdominal segment are not quite so large as those on the ist 

 abdominal segment. The glandular hairs arising from these 

 tubercles and those on the side of the body are long, varying in 

 length, and distinctly bulbous at the <t\\i\, those on the thoracic 

 and posterior thoracic segments being longer than those in the 

 middle of the botly, or in the allied genus Schizura. 



The body above pale yellow, with a greenish tinge, the sides 

 of the body being cherry-red. The ist, 2,(\, and 8th abdominal 

 segments are cherry-red all around including the tubercles, so 

 that the bodv is thrice ringed with red. .Ml the dorsal abdominal 



