THE CANADIAN ENTOMOLOGIST. 73 



the objects of my search to be perfectly at home on these projecting 

 rocks, which were momentarily submerged by the waves, taking seemingly 

 special delight in frequenting rocks where the current was most rapid and 

 the swirl of the waters the strongest. It is a very active insect, and con- 

 siderable dexterity is needed to take it without mutilating, the moment it 

 alights on the slippery stones. 



It would seem that it leads its matured existence entirely on the outside 

 of the water and in the sunlight, the female only entering it for the pur- 

 pose of depositing her eggs on the under side of the stones. 



I am confident that any collector will be well rewarded for his trouble 

 if he will follow the above suggestions in looking for Psephenus. 



LARVA AND PUPA OF PHEOSIA RIMOSA, Pack. 



BY CHAS. F. GOODHUE, WEBSTER, N. H. 



Mature larva, 1.50 to 1.75 long. The body increases in size from the 

 head to the anal segment, deeply incised between the segments. Head 

 small and nearly round ; first four segments can be retracted nearly one- 

 half. Head and entire upper parts of body pale slate color, slightly 

 shaded with brown on the dorsal portion. Yellow beneath between the 

 legs, also a slight stigmatal line of the same color. Caudal horn short 

 and black ; the black extends from the base of horn to below the stig- 

 matae. Anal shield rusty and rough ; stigmatae black, encircled with 

 yellow ; abdominal feet black, the rest pale yellowish. Another specimen 

 differs in color, being pale lavender, a slightly darker dorsal line. Under 

 parts between the legs, a faint substigmatal line greenish yellow. Another, 

 slightly smaller, was of a bright pea green color, with a bright yellow 

 stigmatal stripe, in other respects like the former. The larvae are very much 

 like those of the Sphingidae in appearance, and are exceedingly smooth 

 and shiny. Found on willows and poplars, the last of Sept. The trans- 

 formation takes place in a slight cocoon of dead leaves fastened together 

 with a few silken threads, on the surface of the ground, much in the 

 manner of Darapsa myron. 



Pupa dark brown. Head case smooth, deeply incised between the 

 abdominal segments. Anal segment large and smooth, ending in two 



