254 THE CANADIAN ENTOMOLOGIST. 



ing the insect, particularly just above the spiracles. As it increases in 

 size, the limbs, which are of no more use, gradually disappear, and on 

 reaching maturity it forms a brownish pupa, which on cutting open is 

 found filled with eggs. These are elliptical, .01 of an inch in length, and 

 of a pale yellow color. In one of the cases I counted one hundred and 

 five eggs. 



NUMBER OF BROODS. 



During the year there are three broods ; the first brood hatches from 

 last of April to middle of May ; the second, from middle of July to first 

 week in August ; the third, from last week of August to middle of Sep- 

 tember. One can form some idea of their prolificness, by supposing 

 nothing prevents the first hundred eggs from hatching ; this would give 

 one hundred insects, which in turn produce their one hundred eggs, mak- 

 ing in all 10,000 by second brood ; these each producing a hundred 

 would give a grand total of 1,000,000. ' One million — think of it — the 

 produce of one scale insect in a year ! 



Thanks, however, to that immutable law which governs the universe, 

 it has its enemies to prey upon and keep it from increasing too fast. 



NATURAL ENEMIJtS. 



The twice-stabbed Lady-bug Chilocorus bivulnerus, the blood-red Lady- 

 bug Cydoneda sanguined, and an ichneumon fly, are its principal foes. I 

 have also detected a small white mite, about At, of an inch long, among 

 the eggs and old scales ; but whether it be an enemy or not I cannot say, 

 as I have failed to detect it doing any damage. I'm inclined to think it 

 merely feeds upon the decaying matter of the old scale. 



I have not not yet met with the male of this species, but hope to do so 

 before long. 



The cut will give an admirable idea of the scale. 



NORTH AMERICAN MOTHS. 



BY A. R. GROTE. 



(Continued from Page .-44.) 



Oncocnemis levis, n. s. 



Primaries much shaded with black over dusty ochrey. Markings fine, 

 neat, distinct. The lines black, with narrow included dusty ochrey shades. 

 Half-line present. Anterior line with three dentations. Claviform long, 



