no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 199 



ocellus is concolorous with the fawn-brown of the wing, while in A. yama-mai it is straw-yellow; 

 in <? there is no outer dark semicircle, while it is present in the <? of A. yama-mai. 



The ocelli of the hind wing of A. pernyi is much as in A. yama-mai, but has more red on the 

 inside, and the black ring is narrower and less heavy. 



The two species are very closely allied and apparently are of recent origin; perhaps A. 

 yama-mai is the later of the two forms, as its wings are scalloped, and scalloped wings are 

 apparently a secondary modification. The white extradiscal line of A. pernyi and the dark 

 brown band of A. yama-mai distinguish the two species. 



Geographical distribution. — North China; A. yama-mai is the Japan form; they are probably 

 oidy climatic forms. 



Larva. — Stage III: Length 25 mm. Ready to molt October 1. Food plant, oak. Body 

 of the general shape of Telea polyphemus, but with longer setse. The segments are decidedly 

 convex and angular. The larva differes chiefly from Telea polyphemus of the same stage in the 

 very long bulbous black setse, and in the entirely orange tubercles. Head color of a sere or 

 faded leaf, spottled with black in front; clypeus and labrum paler. The rest of the body pale 

 delicate pea-green. 



Tubercles large, well developed, all orange colored, except those of the lowest row, which are 

 green. 



The dorsal tubercles on the third thoracic segment are a little longer than those on the first 

 abdominal segment; those on the second intermediate in size between those on abdominal 

 segments 1 and 3; those on abdominal segments 2-7 are all of the same size. The median 

 dorsal tubercle on the abdominal segment 8 is as large as either one of the two dorsal ones on 

 abdominal segment I. No external silvery spot on the base, there being a very minute spot on 

 the front of the dorsal tubercles. The corresponding spots on the second and third thoracic 

 and first and second abdominal segments are much larger and more conspicuous, those on the 

 first abdominal segment being the largest. A similar elongated oval silvery spot on the outside 

 of the. base of the lateral tubercles on the second and third abdominal segments. From two to six 

 black hairs arising from each tubercle (six hairs on the dorsal tubercles), the hairs are long, 

 slender, and bulbous at. tip. There are eight such hairs on the median (eighth abdominal) 

 tubercle, which show signs of its double origin. The longest of these hairs are nearly one-half 

 as long as the body is thick. 



A lateral yellowish band, inclosing the orange tubercles, situated above the minute linear 

 black spiracles, which becomes flesh-colored on the last segment. The tubercles of the lowest 

 lateral (infraspiracular) row are dull green and small. All the legs, both thoracic and abdominal, 

 are yellowish green. Body speckled, especially on the sides, with what at first look like fine 

 whitish dots; these dots are battledore-shaped setae. The minute hairs scattered over the body 

 are pale green. 



Stage IV: The larva? molted October 4 or early on October 5. Described October 5, p. m. 

 Segments still angular and convex. Length 30 mm. Tubercles yellow (not orange), the lowest 

 lateral row remaining green. The hairs are still dark bulbous, and some nearly as long as the 

 body is thick, a few fully as long, those arising from the dorsal are supraspiracular tubercles. 

 The flesh-brown line is now more distinct on the edge of the suranal plate, and concolorous with 

 the hinder part of the anal legs ; between this area and the green anterior part of the last segment 

 is a white line. 



Head with two parallel large black-brown spots, on each side of apex of the clypeus, and 

 four small black dots on each side of the head. 



The lateral tubercles on abdominal segments 2-4 very large and conspicuous, being swollen 

 and with a glistening surface, much as in the later and final stage. The three hinder of the setse 

 on the dorsal tubercles of the second and third thoracic and first abdominal segments have become 

 stiff acute dark spines nearly or two-thirds as long as the tubercles themselves ; the anterior three 

 setae remain from this stage onward to the last long hair-like setse ending in bulbs. The black 

 spiracles are now large and more conspicuous, those on abdominal segments 7 and 8 are raw 

 sienna ha hue. The yellowish lateral band is more reddish toward the end of the body. 



