THE LEPIDOPTERIST 13 



tened and concave. The surface of the tgg is covered 

 with 35 to 40 ribs which begin at the periphery of the 

 Microphylarzone and extend well over the edge of 

 the base. Microphylarzone (crown) about 0.1 mm. 

 in diameter, concave, with many closely placed but 

 not prominently developed tubercles. Color of egg 

 light reddish-yellow to reddish-brown, strongy lustrous. 

 Egg-shell soft, can easily be dented — description was 

 made after the hibernating stage of the egg early in 

 March and with the use of a 30x lense. 



The eggs are deposited by the female moth either 

 singly or in small clusters. I observed eight eggs as be- 

 ing the largest number in one cluster . They are loosely 

 fastened and may easily be taken off. The female 

 prefers to place the eggs in narrow grooves or small 

 holes. It deposits its eggs well in captivity and with 

 preference in the holes of a sponge. 



Imago $ . Head and thorax as in arnica, abdomen 

 yellowish-gray, while yellow in amica. Primaries 

 ground color decidedly bluish-gray in appearance, 

 white brownish-gray to ashen in amica, with an 

 occasional faint bluish tinge. Posterior line regularly 

 serrated, the first two thirds running parallel 

 with edge of wings, then bending inward toward the 

 costa. In amica this line always curves more or less 

 at the end of the first third and in its whole length is 

 always irregularly dentated. There is no such prom- 

 inent tooth at the end of the second third of this 

 line as in amica. Basal and median area bluish-gray, 

 the first darker then the last. Tranverse shade in 

 median area present but not much pronounced. How- 

 ever, where it meets the posterior line it broadens and 

 continues to the inner margin and this as well inside 

 of the median area as beyond the posterior line. This 

 extended shade is nowhere very much pronounced but 

 yet plainly noticeable in every specimen before me. 

 Anterior part of median area in most of the specimens 

 very light bluish-gray. Reniform and subreniform as 

 in amica. Submarginal line very prominently devel- 

 oped and of light bluish color. The serration of this 

 line is about twice the size of that in amica. In the 

 middle of the line there is a distinct bluish-white 



