THE CANADIAN ENTOMOLOGIST. 211 



Stouter teeth about the abdominal tip ; the clypeus is armed with spine or 

 tooth. 



The moths issued this year from May ii to July 15. It is a pretty 

 species, the sexes differing somewhat in appearance, the female being 

 easily mistaken for that of acerni, although smaller. 



The male expands 17 mm.; the colour deep black with some metallic 

 scales ; the narrow clothed margins of the wings and heavy discal bar 

 deeper than the apical patch which is more bronze-brown ; fringes con- 

 colorous except the anterior third of inner margin which is yellow. Clypeus 

 with white lateral lines ; palpi light orange except the blackish third joint 

 and outer side of second apically ; collar same colour as palpi ; antennae 

 black, slightly washed with white on outer edge of apical third. The 

 thorax yellow below, black above, with long golden cilia about the insertion 

 of the wings. Abdomen black above, same below, with more or less of 

 golden scales running up on the sides at edges of rings, and on fourth 

 ring giving a narrow band, in some seen faintly on other dorsal rings. 

 Anal tuft ample, black above and laterally at base, below deep reddish 

 orange. Claspers yellow. Legs : coxae golden, other joints black out- 

 wardly, golden inwardly to claws, last pair with middle of tibia and tips 

 of tasal joints ringed with golden ; the inner side of fore tibiae is light 

 orange ; spurs concolorous with the golden yellow legs. 



The female expands 20 mm. General colour the same as male, but 

 differs in having less black at tips of palpi, in having much more golden 

 beneath abdomen, in having the same extending over dorsum so that 

 nearly all the rings are faintly edged, and the fourth with a broad band, and 

 in having no black in the ample caudal tuft which is deep reddish-orange. 



I have compared the moth with Henry Edwards's description of 

 Aegeria and conclude it is his Aegeria corjii, although one cannot be 

 positive without comparing the type. He had before him only one male 

 taken in Purgatory Swamp, Mass., and the description is not all that could 

 be wished. My specimens differ slightly from the description and vary 

 considerably, frequently more than some of Mr. Edwards's species differ 

 from one another. I will point out some differences which it seems to 

 me are easily reconciled. He gives expanse oi corni 15 mm.; the smallest 

 of mine (males) is 15 mm., the largest 18 mm., average 17 mm. He 

 says, " No bands," Some of mine are scarcely banded after storage in 

 the cabinet a month. He says " spurs light orange." In mine they are 

 not, the only real difference between his descriptions and my moths. 



Before our next annual meeting I shall try to compare my moths with 

 the type, and shall take pleasure in reporting the results. 



Is the moth an inquiline ? It would seem so, yet after much search- 

 ing I have found only one beetle borer that would probably serve as a 

 forerunner ; this was found in an excrescence of Acer dasycarpum. The 

 Aegerian is far more abundant in Acer saccharifium. 



Aegeria riibristignia, n. s. — Whilst searching in excrescences on the 

 oak for examples of Aegeria gallivora, I came upon the present species, 



