196 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



good generic character, separating it at once from T. polyphemus, and the suranal plate is not 

 edged with purple, but with faint yellow. 



When fully fed, 1 its length is 65 mm. Maine, August 20. The head is green, of a different 

 hue from the body, more like Paris green. The body is large, heavy, plump, and thick, much as 

 in T. polyphenols, and the tubercles are pinkish red, or crushed strawberry. The suranal plate 

 is edged with yellow in front, but the surface is coarsely granulated, and in color dull amber; 

 there is a similar long narrow patch on the side of the anal legs, bordered above with black 

 and straw-yellow. The spiracles are green with the edge of the linear opening ochreous. The 

 yellow lateral line is obscure. The body is still provided with white hairs, not arising from 

 tubercles. The body is pea-green, dorsally slightly tinged with ruddy. 



Recapitulation of the more salient ontogenetic features. 

 A. Congenital features. 



1. Setae tapering to a point, not bulbous, and finely barbed. Stage I. Most of them are three 



or four times as long as the tubercles. 



2. Some larvae in stage I with a very broad lateral dark band along the side of the body, some 



without it ; no transverse stripes present, but the head in front is twice banded with dark 

 brown. 



3. The 2d and 3d dorsal thoracic tubercles differentiated in stage I, being slightly larger than 



the abdominal ones. 



4. On the suranal plate are two rudimentary tubercles, each bearing a tuft of bristles. 



5. The dorsal median tubercle on uromere 8 does not show such marked traces of its double 



origin as stage I of C. promethea, or T. polyphemus, but it is more duplex than in S. cecropia. 



B. Evolution of later Adaptational Characters. 



1. Dorsal tubercles in stage II higher than before. 



2. The lateral dark band disappears in stage II. 



3. In stage III the dorsal thoracic tubercles become nearly twice as long and thick as the 



abdominal ones. 



4. The head is not banded in stage IV. 



5. The tubercles brightest (pink or dark carmine) and most conspicuous in the last stage. 



6. A distinct infraspiracular yellow line in stage IV, and the suranal plate and anal legs lined 



with yellow, and the surface of the suranal plate and sides of the anal legs amber. 



[The records of the United States Department of Agriculture indicate the occurrence of 

 T. luna in the following localities : New Hampshire (Derry, Center Sandwich) ; Vermont (Nor- 

 wich) ; New York (Brooklyn) ; New Jersey (Hackensack, Allendale) ; Pennsylvania (Spring 

 Creek, Lancaster, Tamaqua) ; OMo (Franklin) ; Maryland (Pearson) ; Virginia (Carlin Springs) ; 

 North Carolina (High Point, Wilkesboro, Raleigh) ; Kentucky (Louisville) ; Illinois (Douglas) ; 

 Arkansas (Orlando) ; Indiana (Rockville) ; Tennessee (Henry) ; Louisiana (New Orleans, 

 Wilsons Point) ; Mississippi (Craig) ; Florida (Astor, Madison, Kissiminee) . I picked up a 

 fragmentary specimen from the seabeach at Woods Hole, Mass. 



The following are from the records of the Bureau of Entomology: 



V. T. Chambers counted 22 Tachina eggs on a single T. luna larva; this larva produced a 

 moth, notwithstanding. (C. V. Riley.) 



A. H. Mundt, of Fairbury, 111., sent eggs of T. luna which were infested with what was 

 supposed to be a species of Pteromalus. (T. Pergande).] 



[Prof. M. II. Swenk reports that T. luna "is common in eastern Nebraska wherever walnuts 

 occur. We have specimens from Lincoln, Nebraska City, Weeping Water, Beatrice, etc." 

 Gitt July, 1912).] 



"Not uncommon from here [Ottawa] westward throughout Ontario, and up to Winnipeg 

 in Manitoba. I have seen two specimens in Manitoba, but doubt if it extends farther than the 

 wooded country on the east of that Province. There are no maples, butternuts, hickories, 

 or walnuts native in Manitoba." (J. Fletcher, litt 1900.) 



1 Dyar states that there are hut four stages. 



