52 



Larva. — When full grown it measures 10 ram in length by 2| mm in diameter, the 

 form being rather thick cylindrical ; color translucent white, tinged with yellowish 

 green; surface velvety; piliferous plates small, glassy, giving rise to short, fine, 

 light hairs. Head and cervical collar same color as general surface or a little deeper 

 in shade, inclining to amber. The head is broad and flat, with red-brown tropin, 

 and a very large dark brown spot on each side. Legs and prolegs same color as gen- 

 eral surface. 



When full grown it forms a tough, oval cocoon, thickly covered with 

 particles of soil, on the surface of the ground, occasionally just beneath 

 it. It is but single-brooded, and is very difficult to rear in confinement, 

 as it must be kept through the heat of summer and the cold of winter, 

 and if a little too damp it molds, while if moisture is withheld it dries 

 up. From almost innumerable larvse collected during several years I 

 have only been successful in rearing two or three specimens, enough, 

 however, to determine the species, and, as the moths are always abun- 

 dant early in the spring on the trunks of orchard and forest trees, there 

 need be no scarcity of specimens for the cabinet. 



Adult.— The moth expands 15 mm , wings rather narrow. In color it closely simulates 

 the bark of the trees on which it naturally rests. The vestiture of the head is brown 

 interspersed with gray ; palpi and antennae cinereous ; thorax and abdomen pale 

 brown. Primaries brown, with a series of oblique double silvery streaks all along 

 the costal edge, extending about one-fourth across the wing; a large silvery spot of 

 irregular outline, inclosing a patch of dark brown, is situated near the outer edge of 

 the wing, and a less distinct patch of silvery scales occurs on the inner edge near the 

 middle, while a shading of the same color modifies the brown tint on other portions 

 of the wing. Cilia pale brown and cinereous intermixed. Secondaries cinereous, 

 shading on costal edge to pale brown; cilia dingy white. There is some variation 

 in distinctness of the markings and depth of coloring. 



Steganoptycha pyricolana Riley MS. — This is somewhat similar 

 to the above in coloring, but smaller and proportionally broader winged. 

 This bores the shoots of the second growth of apple in August and Sep- 

 tember, occasionally on recently planted trees, inflicting serious damage. 

 The larva spins scarcely any web, but bores downward through the ter- 

 minal bud, entering the stem for from half an inch to an inch, sometimes 

 blackening all the growing points of a young tree. 



Larva. — When full grown it is 8 mm long by l\ mm in diameter, slender, subcylindri- 

 cal, tapering slightly in both directions from middle segments ; surface smooth ; 

 incisions deep ; color, pale cream yellow, somewhat translucent ; the dorsal surface 

 beautifully mottled with rose red. Piliferous warts and hairs only discernible with 

 a lens. Ventral surface pale, slightly concave, and much wrinkled. Head elongate, 

 cordate, pale brown, shading to dark brown on the middle of each lobe; trophi prom- 

 inent, dark brown, with two or three long light hairs on each side. Supra-anal 

 plate oblong, large, dark, smoky brown. Legs and prolegs rather unusually de- 

 veloped. 



I failed to rear the first specimens collected, most of them wandering 

 around in the jar until they died. Subsequently, by supplying them 

 with bits of pith or bark in which to bore, I succeeded in getting three 

 or four imagos between the last of September and the first of October. 



