MEMOIRS OF TBE NATIOXAL ACADEMY OF SCIENCES. 237 



two others above. There are no markings on the second and third thoracic segments, but ou each 

 abdominal segment there is a pair of acute dorsal brown spines, those on the fust and eighth 

 segments being almost twice as large as the others. A pair is also situated close together on the 

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

 The body is pale greenish yellow. A dorsal reddish brown band beginning from between the 

 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 bauds extend out upon the 

 anal legs. 



The thoracic and middle abdominal legs are pule, like the body.' 



Stage III. — Length, 10 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 ereeiung. The body is pea- 

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

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

 segment to form a broad median dorsal line ending on the third 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, parallel dorsal stripes 

 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 next to the head. 



Another larva of this species was found feeding on the rock maple, at Brunswick, Me., July 

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



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

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



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

 confluent, but the effect is dull reddish. Ou 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 Schizura (these spots are not present in {iiitHvitta, 

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

 first stage). 



July 28. 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. There 

 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 suraiial plate. It molted August 2. 



Stcuje III. — Length, 15 mm. The horns are still retained in this stage. It is, perhaps, a little 

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



'On exaniiuing Dr. Dy.ar's specimens I liud that IT. hhindata differs in Stage I from //. gultivilta in having the 

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

 than those on segments 2 to 7. 



Another larva sent by Mr. llridgham perluaps represents Stage III immediately after molting. The following is 

 a, description of it; 



Length, 8 mm. The head is very large, much wider than the body (not yet tilled out), and i>roduced toward 

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

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

 spines are llesh colored or very light brown, becoming reddish brown at tlie end. A dark, diffuse, vaudyke-brown 

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

 area, containing a pair of niinute, short, iiarallel reddish dashes; finally the baud unites to form a dark patch on the 

 fourth and fifth ab<lominal segments; this divides again and stops before reaching the eighth segment, on which is 

 a diffuse dark patch more or less spotted with pale marks. The sides of the body are more or less mottled and 

 streaked with reddish brown. 



