loO THE CANADIAN ENTOMOLOGIST. 



Distribution. — London, Ont. (Geo. Anderson) ; Jul}' 6 (A. P. 

 Saunders); Sept. 6 (H. S. Saunders)*; Orillia, Ont., June 28, July 5 

 (Grant). 



16. Celia. — Through the kindness of Dr. Bethune, who has 

 generously presented the original type of celia to the Division of 

 Entomology, we are able to figure it on the plate accompanying this 

 article. It will be noticed that the photographs of celia and 

 determinata $ are very much the same, but the moths themselves seem 

 quite distinct, although it is difficult to describe the differences. Five 

 specimens of celia are before me, and none of them are anything like 

 phyllira, of which celia has often been referred to as a synonym. All the 

 five specimens, four of which were submitted to Dr. Dyar, are smaller 

 than the type, and show a decided tendency to melanism. A single egg 

 of celia was obtained by Mr. C. H. Young, from a female moth which he 

 collected at Meech Lake, Que. (near Ottawa). This egg, which was laid 

 on May 27 and hatched June 9, he kindly gave to the writer, who reared 

 the larva through six moults. After reaching Stage VI L and feeding for 

 some days it went into hibernation. When examined later, however, it 

 was noticed that a disease had attacked the specimen, so it was killed 

 and inflated. As will be seen from the following notes on the larval 

 stages, our specimen was a fairly large caterpillar, and not at all like the 

 larva o{ phyllira as published by Packard. Saunders's description of the 

 mature larva oi celia agrees very well with our notes on Stage VII. as given 

 below. Further investigation, however, is needed. The full-grown larva 

 described by Saunders was found under a log in a wood near London, 

 Ont., on June 1 1. 



Stage I. — Length newly - hatched, 2 mm. Colour at first dirty 

 creamy white, after feeding greenish, with a tinge of brown. Head 0.3 

 mm. wide, shiny ; cheeks almost wholly black, just above ocelli pale 

 brownish ; clypeus and lower portion of face pale brownish ; mouth-parts 

 blackish. On each segment is a transverse row of black tubercles, i. 

 almost half the size of ii., which is the largest, iii. nearly as large as ii., iv. 

 about same size as iii. Cervical shield dark brown, bearing the usual 8 

 tubercles. Skin of body smooth, shiny. Sette from dorsal and upper 

 lateral series of tubercles mostly black, only a few silvery bristles; from 

 remaining tubercles, silvery. Bristles finely barbed. Thoracic feet 

 slightly darker than body ; prolegs concolorous. 



*Can. Ent., Vol. XXL, p. 60. 



