232 .MEMOIKS OF THE NATIONAL ACADEMY OF 8C1ENCES. 



of the secoTid abdoiiiiiuil pair aii> iiuifli siiialler tliaii tlii' pair in front niul those hehiiid. Those' 

 of the thiril abdominal segment are not so hirge as the first, but much lonj;er than those behind. 

 The i^air on the eighth abdominal segment are of the same size and shai)e as those on the first 

 abdominal segment, bnt are sli<;litly sliorter. Tlie suranal jdate is rouiuled, convex, shiniii"' 

 bhick, fiiving rise to a pair of black horns shorter than the shortest ones in front. Thoracic legs 

 blackish; the middle a1)d()iiiinal legs of a ])itchy color. 



It molted July 10, being perhaps belated, as are most in the next stage. 



iSt<((jc 11. — Length, 5-0 nun. Head and body uniformly iiver-colored or reddish brown. Head 

 conical, rounded, entirely liver- red, like the body, with uo lateral bands or any nuirkings. Now 

 there in only it single pair of very short horns or tubercles sitnuteil on the iirolhoraeie sef/ment, with 

 no traces of the others. These protlioraeic tubercles arc cylindrical, short, scpiare at the end, 

 which is dark and no longer than one-third the length of the aiuil legs, with uo branches. The 

 end of the body is uplitted; the anal legs are concolorous with the body. Tiic body gradually 

 tapers to the end, with no traces of any markings. 



1 found, July 14, other larvie on neighboring maple trees, of which the following is a descrip- 

 tion, and think it is the same species: 



Stii<ie III. — Length, 10 mm. The head is non- renj hinje, snhtrinniiuhir, rising higher than 

 the body behind, and much wider than the body; greenish, with a broad, pale reddish band on 

 each side, meeting on the vertex. The prothoracic horns are now represented by the conical 

 piliferous tubercles of moderate size, dark reddish at the end, from each of which a reddish line 

 passes back to the first abdominal segment. The third abdominal segment is pale reddish above, 

 the hue passing down to the base of the first i)air of abdominal legs. Along the back of 

 abdominal segments 4 to (! is a pale reddish band interrupted by the sutures. On abdominal 

 segments 7 to is an elongated, I'eddish, diamond-shaped, dorsal, pale red band, including the 

 suranal plates; a faint reddish lateral spot m\ the side of the sixth abdominal segment. 

 Abdominal legs yellowish, concolorous with the body. Anal legs long, slender, u])lield; thoracic 

 legs i)ale; the sides of the body just above their base discolored with pale reddish. A distinct 

 subdorsal yellow line on each side of the body, not so distinct on the last three abdominal segments. 



In three specimens, with little doubt of this species, which were 15 mm. in length, there are 

 two parallel red lines extending backward from the prothoracic tubercles and diverging, as iu 

 the smaller sjiecimens, on the first abdominal segment. On the third abdominal segment is a 

 crescentiform dorsal red spot, the horns pointing anterioily; on the segment behind is a median 

 triangular red patch, and on the five succeeding ones collectively is a much smaller one, cleft 

 behind. In this specimen the hollow of the crescentiform spot is filled with a yellow curved spot, 

 but iu one of the other examples there is in place of it a white ])atcli, and the crescentiform spot 

 is represented by two short parallel lines. There is another reddish dorsal patch common to the 

 seventh and eighth segments. Indeed there is much variation in the markings. The suboval 

 yellow lines are distinct. There are four small, short, lateral, (ibli(|ue, reddish patches on the 

 side of the body, one at the base of the third pair of thoracic legs, another at the base of tiie 

 fourth pair of abdominal legs, and in one of the specimens one at the base of the first pair of 

 abdominal legs. 



Sldf/e IV. — Length, 18-20 mm. Head large, wider than the body, flattened in front. The 

 band on each side is rather short and broad, not reaching to the base of the anteunaj and not 

 meeting above on the vertex; it is comjjosed of lines of four (colors, being black within, then white, 

 then a broad pink band broadly shaded externally with yellowish. No tubercles on the to]) of 

 the prothoracic segment, but a yellowish patch containing two lines forming the beginning of the 

 two i)arallel reddish sienna brown lines, which end on the first abdominal segment. Behind this 

 spot are three yeHow dorsal lines which end on the hinder edge of the third abdominal segment. 

 On this and the next segment is a conspicuous forked sienna-brown line, inclosing on the third 

 segment a white triangular patch. The two subdorsal yellow lines are broad and distinct, edged 

 within with reddish on the eighth segment and on the suranal plate. iSides of the body witli 

 scattered black specks. Spiracles yellow, finely edged with black. A slight, short, narrow oblique- 

 line on the side at tlu^ base of the legs of the third thoracic and sixth abdominal segments. A 

 reddish line on the inside of the anal legs. A black dot on the middle of the thoracic legs. 



