398 Report of the Department of Entomology of the 



Table 1. — Ermine Moths Collected in New York During the Years 1909-12. 



* The nest at the time of delivery to the Station had five pupcs. 

 ^ This nest was reported as having about 50 caterpillars. 



' On this date cocoons were formed and moths had escaped. 



* This nest contained 3 caterpillars. 



^ Three, 14 and 36 caterpillars respectively. 



* Nine and 16 caterpillars respectively. 

 ' Five caterpillars. 



NOTES ON IDENTITY OF APPLE SPECIES. 



CHARACTERS FOR SEPARATION OF SPECIES. 



The determination of the moth bred from cherry as padellus has 

 already been mentioned, and it is now to be noted in Table I that 

 by far the larger number of Yponomeuta larvse were collected from 

 apples. The question arises, " To which species do these belong, — 

 to padellus or malinellus? The moths of the former, as has been 

 previously indicated, are exceedingly variable in their markings, 

 and unfortunately the identification of the two species seems to 

 rest largely upon color distinction of the adult insects. In spite 



