304 LEPIDOPTERA. 



carrying a kerosene lamp into the woods and watching for 

 whatever is attracted by its light. 



Tliyatira and Cymatophora are allied by their small, hairy 

 heads, to the Notodontae in the preceding family. In Thyra- 

 tira the palpi are long and depressed, and the 

 fore wings are dark, with five or six large light 

 spots, and the larva is like that of the Xoto- 

 Fig. 233. dontae, the segments being humped, and the 

 anal legs raised while at rest, while Cymatophora is pale ashen, 

 the fore wings being crossed by four or five waved linos. The 

 larva is smooth, rather flattened beneath, with a large head. 

 It feeds on trees, between two leaves united by silk. C. cani- 

 plaga Walker describes from Canada. Gramatophora trisig- 

 nata Doubleday (Fig. 233, fore wing) is a gaily colored spe- 

 cies, greenish, marbled with 

 black, with three large, round, 

 brown spots on the fore wings. 

 The larva (Fig. 234) is 

 humped, giving it a zig-zag 

 outline, and is brown with the 

 third to the sixth abdominal Fi s- 234 - 



rings much paler. It has the unusual power of boring very 

 smooth, cylindrical holes in solid pine wood. We have re- 

 ceived specimens of its tunnels from Mrs. J. Brigham. We 

 have found the larvae just moulting on the leaves of the lilac, 

 September 12th. 



In Acronycta the head becomes large and broad, the fore 

 wings are broad and short, with dark streaks and a dark mark, 



like the Greek letter Psi on the 

 inner margin. The larviv vary 

 in being humped or cylindrical. 

 235 - downy, slightly hairy, or very 



hairy, and feed exposed on shrubs. The pupa lies in a co- 

 coon made in moss or in crevices of bark. A. ob/im'tx Smith 

 (Fig. 235, larva) is whitish gray, with darker streaks on the 

 fore wings. 



Apatela Americana Harris is a large, pale gray moth, without 

 black streaks, whose woolly, yellowish caterpillar, with long, 

 slender pencils of black hairs, feeds on the maple. 



