196 MEMOIRS OF THE XATI0:NAL ACADEMY OF SCIENCES. 



Tlie protlioraoic segment is wider than the succeeding ones, with two very iarge dorsal 



' pihferous tubercles, situated far apart, while those on the rueso- and nietathoracic segments are 



minute and situated not so near together as those on the abdominal segments. The tubercles ou 



the lirst, third, eiglith, and ninth abdominal segments are larger than those ou the other segments. 



They are all darker than the body, and dull amber-brown in color. 



The body in general is greenish yellow, with a pale reddish band around the ](rothoracic 

 segment and around the first, third, and eighth abdomimil segments. The liairs are in most cases 

 about twice as long as the body is thick. On the head are a few scattered simple hairs, pointed at 

 the end. Those on the segments behind the head are in general clavate at the tip. Those of the 

 two large prothoracic tubercles and of the larger warts on the eighth and ninth abdominal 

 segments are nearly twice as long as most of the others, and are sligiitly bulbous at tip. Those 

 on the meso- and metathoracic segments are about a fourth longer than most of those on the 

 succeeding segments to the eighth abdominal. 



The larva just before the first molt is nearly twice as large as when first hatched, but it can 

 be easily distinguished by its hairs alone from those in the second stage. 



The thoracic legs are black, the abdominal, including the anal legs, dusky. ISefore molting 

 the larva doubles in length, finally being (i mm. long. 



Second star/e, after the first molt. — Observed to molt July 19-24. Length, 7-8 mm. The larva is 

 very ditt'erent from tlie jireceding stage. The head, though smaller in proportion to the rest of the 

 body, is still much witler tlian the body, ending in the vertex in two conical tubercles, much as in 

 the adult; color of the head brown, with four rows of large round pale spots, three in each row; 

 the sides of the head and occiput pale. Prothoracic segment with two large black-tipped conical 

 tubercles, and two much larger ones on the first and eighth abdominal segments, those on the 

 first being larger than those on the eighth segment and several times larger than in the first 

 stage; there is a smaller pair on the fifth abdominal segment. Anal legs long and slender, of 

 much the same proportions as in the fully fed larva. Color of the body greenish, but the 

 prothoracic and first, third, fifth, and eiglith abdominal segments reddish. The piliferous 

 tubercles on the side of the body are not so large and i)rominent as in Stage 1. 



The hairs are not quite so long as the body is thick and of more uniform length all over the 

 body than in Stage I, and decidedly different in shape from those of the first stage; they are 

 shorter, thicker, and somewhat shovel-shaped, being broad and Hat at the end and slightly 

 notched or toothed on the edge, the flattened portion being striated; those of the bead are still 

 simple. Those of the two prothoracic tubercles are twice as long as those on the meso- and 

 metathoracic segments, the hairs on the latter two segments and on the abdominal being 

 somewhat shorter than the body is thick ; those of the two larger tubercles on the eighth and 

 ninth segments are a little longer than those ou the smaller tubercles at the end of the body. In 

 nearly all the hairs the shaft is, irnder a i-inch Tolles objective, seen to be finely spinulated. 



Third stage, after the second molt. — Observed to molt August 1-2. Length, 10-11 mm., finally 

 becoming 13-14 mm. The head, tubercles, and hairs (setie) much as before, the head retaining the 

 same style of markings. The colors of the body, however, have changed; there is an irregular 

 double dorsal reddish resinous line ou the thoracic segments. On abdominal segments 2 to'4 is a 

 single line, and ou the same segments the dorsal tubercles are yellowish green, as are those ou 

 segments 6 and 7. The ground color of the l)ody is yellowish green, irregularly marbled on the 

 sides with resinous red. The anal and other abdominal legs are tinted with reddish. There is a 

 lateral reddish line along the sides of the thoracic segments; a double dorsal reddish line on the 

 seven terminal abdominal segments extending out on the uplifted anal legs (not developed iu 

 Stage II, though faintly indicated). 



Those observed August 1 later on in this stage had changed a little since molting; have 

 assumed more of the distinctive coloring of the fully fed larva; the yellowish green parts, 

 esjiecially on the thoracic segments, are now of a bright pea-green, while the silvery white 

 V-shaped inark on the sixth to eighth abdominal segments, so characteristic of the genus 

 Schizura, is now very distinct. (This mark is iaintly indicated in the pre\ious stage by two broad, 

 slightly converging, whitish yellow dashes ou the seventh segment and a median pointed whitish 



