THE CANADIAN ENTOMOLOGIST. 203 



Orthesia Edwardsii n. sp. 



Male sac. — This is broadly oval, pure white, .15 of an inch long by 

 .12 of an inch in breadth. It was evidently formed by a secretion of 

 fine, waxy flakes, the regularity of which has been lost as the insect 

 reached maturity, the dorsal disk being entire, and the flakes only being 

 partially distinguishable at the margins. 



Male. — Length .12 inch; style about .04 inch. Entirely black, 

 excepting a reddish cast on the mesothorax, scutellum, metathorax, 

 abdomen at sides and beneath, and the epipleura of the mesothorax ; 

 while the head beneath the insertion of the antenna? is pale yellowish 

 white. Head small, nearly quadrate, being but slightly narrowed 

 posteriorly. The eyes consist of 5 or 6 ocelli placed at the side of the 

 head, while the mouth consists of two large, quite prominent ocelli. 

 Antennae very long, the points of which have four or five irregular nodose 

 swellings, with irregular whorls of long, delicate bristles ; the first two 

 joints are very short, not as long as wide, the 3rd and 5th joints the 

 longest, about an equal length, the 4th, 6th, 7th, 8th and 9th shorter and 

 gradually subequal, the 10th or apical joint more thickened, fusiform, 

 about four-fifths the length of the penultimate joint Thorax short, less 

 than one-half the length of abdomen ; the prothorax is hardly distinguish- 

 able from above, being but a delicate ridge or collar ; mesothorax quite 

 short, somewhat trapezoidal in outline, and obliquely ascending towards 

 the scutellum, but with a depression in the middle, the lateral lobes 

 distinct ; scutellum highly convex, polished, with some short hairs on the 

 disk, abruptly transversely divided by a deep, yellowish fissure posterior- 

 ly. Metathorax very short. Legs very long, rather slender, black, and 

 with a long, fine hair pubescence ; tibiae longer than their femora, slender, 

 cylindrical ; tarsi less than one-third the length of tibiae and more slender, 

 gradually acuminate toward apex and terminating in a small, delicate 

 claw ; no digitules. Abdomen, on the dorsum, wrinkled, at sides towards 

 apex covered with a white, waxy substance, and terminating in two very 

 long caudal setae, more than double the length of the insect, rather 

 thickly covered with a white, waxy substance, especially at base, so 

 that in reality they are much more slender than they appear. Style long, 

 blackish. Wings two, white, of the ordinary shape, but I can detect a 

 spurious vein, springing from near the base of the longitudinal vein, 

 between it and the costal margin, and running parallel with it to half the 



