142 



and changed to pupa July i. It was 28mm. long, of the usual form 

 and color. Cremaster armed with eight hooks placed as usual, 

 /'. e.y the four lower stout ones turned outwards ; the four upper 

 weak ones turned towards the median line. 



The imago appeared July 27. Expanse 70 mm, 



Amatrix. — One larva was found, Corinna, Mich., July 24, 

 under a large-toothed aspen* {Popiilus grandidentata). Its length 

 at rest, 68 mm., when crawling, 'j'j mm., width of head, 4.25 mm., 

 width of first thoracic ring, 5.5mm., width of eighth and ninth 

 rings, 9 mm. The usual form. The color gray with a reddish 

 shade, more pronounced at the articulations. The slightly 

 flattened, mottled brown head is more prominent apically than 

 fiebilis ; it is bordered laterally by heavy black lines. The first 

 ring bears above a quadrate patch having the color of the head 

 faintly spotted with white. The dorsal line is quite inconspicuous. 

 The first three rings are strongly wrinkled transversely, the 

 remaining rings have only their posterior third more or less thus 

 wrinkled. The eighth ring has its transverse fold elevated into a 

 light clay-colored protuberance, there is a black splash on either 

 side at its base, at the lower edge of which there is a small black 

 circle with dot at its center. Of the four dots borne on the back 

 of the body rings, the posterior pair is brownish and larger than 

 the anterior ; this pair on the eleventh ring become pronounced 

 tubercles, having a black streak passing forward from them just 

 above the spiracles. The hairs from the papillae are dark. The 

 lateral fringes are pinkish. The ventral surface is white with 

 more or less of black or brown on each ring. On the first three 

 brownish, the patches illy defined, on the succeeding four sharply 

 defined black, largest on the sixth and seventh, on the remaining 

 rings smaller and brownish. 



The pupa appeared July 31 ; the moth August 27. The pupa 

 was 38 mm. long, rather thich. Its color, surface and booklets 

 of the cremaster as in flebilis. 



The pupa was quite inactive for one of its genus, when dis- 

 turbed would not throw itself so violently from side to side as 

 some others do. 



PROFESSOR RILEY ON DAKRUMA. 



By a. R. Grote. 



Although I have carefully studied the characters of a number 

 of genera and species of Phycidce, and, therefore, ought to appre- 

 ciate any discussion upon them, I confess I do not fully under. 



* Mr. Fischer, of Buffalo, has also bred amatrix this summer from larvse found on the Lombardy 

 poplar. 



