MEMOIKiS OF TQE >«rATIOXAL AGADEMY OF SCIENCES. 237 



two (ithi'is iibovo. There are no in,iikiii.i;s on tliii second iiiid tliird Mioracic .segnieiits, but on each 

 abdominal segment there is a i)air ol' aiuili; dorsa! brown spines, those on tlie first and ciglitii 

 segments being almost twice as large as the others. A ])air is also sitnated (dose together on the 

 ninth segment. The end of the body is elevated, the anal legs small, slender, reddisli brown. 

 The body is ])ale greenish yellow. A dorsal reddish brown baud beginning from between tiio 

 horns, and widening so as to inclose the two spines on the first abdominal segments, then breaking 

 up into two lateral lines so as to inclose a greenish yellow area extending from the middle of the 

 first to the middle of the third segment; farther back it again breaks apart so as to inclose a pale 

 yellowish spot on the sixth and seventh segments; from thence the bands extend oui, npon the 

 anal legs. 



Tlie thoracic and middle abdominal legs are pale, like the body.' 



^ta(ie TIT. — Length, 1(1 mm. it is green, smooth, with two large dorsal, conical, prothoracic 

 spines, not, however, much exceeding the vertex of the head. The head is narrow toward the 

 vertex and as wide as the body in its thickest part — i. e., the middle; it is yellowisli green, with a 

 double red line on each side, the outer line being much broader than the inner. The body tapers 

 to the end, and the anal legs, though long and slender, are used in creejnng. The body is pea- 

 green; the prothoracic spines are yellowish at base, reddish brown at the tip; from the end of each 

 spine a narrow reddish tliread line passes back and the two unite on the back of the prothoracic 

 segment to form a broad median dorsal line ending on the thud thoracic segment. On the fourth 

 abdominal segment is a shield shaped, bright brick-red spot; on the seventh a double linear, 

 coalesced oval reddish spot. A pair of widely separated, reddish, narrow, jnirallel dorsal strijtes 

 on the top of the eighth abdominal segment, while the abdominal legs are striped externally with 

 red; all the other legs are pale greenish. A pair of broad, subdorsal, yellow, long lines extending 

 from the sides of the prothoracic segment to the side of the anal legs. There are no other spines 

 than on the segment nest to the head. 



Another larva of this species was found feeding on the rock ma])le, at Brunswick, Me., July 

 21, 1893; it molted August 2. It shook its head rapidly from side to side when disturbed. 



>Sta<je 7/. — Length, 10 mm. Body moderately slender, somewhat compressed. Head and the 

 entire body reddish livid brick red. The horns as in PI. XXXIl, fig. 1, la, and dull reddish. 



The body is covered with fine reddish and yellow, short, irregular lines, which are somewhat 

 contiuent, but the ettect is dull reddisli. On the first to third and on the fifth, sixth, and seventh 

 abdominal segments is a dorsal, median, bright yellow spot, which becomes on the seventh segment 

 forked, and resembles the similar spot in Seliizura (these si)ots are not present in (/uttivitta, 

 which is entirely reddish, and in this stage it has two tubercles representing the horns of its 

 first stage). 



duly lis. It is now 12 mm. in length; it has not yet changed, but now there is much more 

 green on the sides of the body, and the yellow dorsal spots are larger and more whitish. TJiere 

 is a short white line between the base of the horns. There are two whitish dorsal patches on the 

 ninth abdominal segment in front of the suranal idate. It molted August 2. 



Slai/e TTT. — Length, lo mm. The horns are still retained in this stage. It is, i)erhaps, a little 

 stouter than before. It wags its head rapidly from side to side when disturbed. The head is now 



I Oil examining Dr. Dyar's specimens I find that H. hiiitidata differs in Stage I from 77. gnttiriflfi in having the 

 dorsal spines on abdominal segments 1-8 all of about tlie same size, those on segment 1 and 8 being no longer 

 than those on segments 2 to 7. 



Another larva sent by Mr. Bridgham perhaps represents Stage III immediately alter molting. Tlie following is 

 a description of it: 



Length, 8 mm. The head is ver.v large, much wider than the body (not yet tilled out), and produced toward 

 the vertex; on each side of the front is a dark, narrow, distinct line, outside of which is a dull reddish ditfuse line. 

 The body tapers to the end, and is Hesh colored, witli greenish and yellowish hues. The two large conical prothoracic 

 spines are flesh colored or very light brown, becoming reddish browii at tbe end. A dark, diffuse, vandyke-brown 

 dorsal line, double between the tubercles, uniting behind them and then diverging so as to inclose a whitish oval 

 area, containing a i)air of minute, short, parallel reddish da.shes; linally the baud unites to form a dark patch on the 

 fourth and lifth abdominal segments; this divides again and stops before reaching the eighth segment, on which is 

 a diti'use dark i)atch more or less spotted with pale marks. The sides of the body are more or less mottled and 

 streaked with re<ldi8h biowu. 



