SHADE AND FOREST TREES. 371 



salis, top and side views), which with difficulty can he distin- 

 guished from the twigs on which it lives. The caterpillar of 

 this family (Phalasnida;, or Geometers) are well-known to 

 resemble in color the leaves on which they feed, or the twigs 

 among which they live, and some are ornamented with tul)crcles 

 and other appendages, causing them to strikingly resemble the 

 twigs on which they rest. Moreover, their habit, when at rest, 

 of holding themselves out stiff and motionless, adds to the 

 resemblance. 



The caterpillar on the common juniper, was sent me from 

 Norwich, Conn., by Mr. S. H. Scudder. The best description 

 that could be given of it is to say that it would easily be mistaken 

 for a portion of a twig of the tree on which it feeds. It is about 

 an inch and a half long, and less than a line in thickness. Its 

 body is rather rough, and with a few prominent tu1)ercles in size 

 and form resembling the scales left by the falling of the leaves 

 of the juniper. 



On the 17th of June it changed into a beautiful pea-green 

 chrysalis, of the form indicated in Mr. Emerton's drawing. On 

 the 29th of June the moth appeared, so that it lives about twelve 

 days in the chrysalis state. 



The moth proved to be an undescribed species, which may be 

 called Drepanodes juniperaria (Plate 1, Fig. 5). It has unu- 

 sually falcate fore wings. The ground color of the upper side of 

 the wings is a pale fawn brown, with a rusty, but no purplish 

 tinge, as in some other species of the genus ; but the body and an- 

 tennae are pale fawn brown. The fore wings at the base are fawn 

 brown, but with rather thick-set black scales, especially towards 

 the inner line. This line is curved zigzag, rusty fawn brown 

 and is very distinct ; it begins at the basal third of the costa, 

 and curving around opposite the discal dot, in a generally oblique 

 direction, ends nearly as far from the base of the wing on the 

 inner edge as on the costa ; below the median vein the line is 

 acutely zigzag, forming a tooth just below the lowest median 

 veinlet, followed by a curve inwards on the submedian vein. 

 The discal dot is small, black, but distinct. Just beyond the 

 dot, the wing inside of the outer line is rusty, becoming deeper 

 in tone next the line. The outer line is straight, white, narrow 

 but sharply defined, and forms an acute angle opposite the apex, 

 being reflected back on the costa. The line is shaded externally 



