15 



Other members of the same subfamily of parasites, the AphelininaB, 

 have also been reared from the cottony maple scale. The species known 

 as Coccophagus flavoscutellum Ashm., a more southern species than 

 Coccophagus lecanii, does almost equally effective work in the more 

 southern portion of the geographic range of the scale. 



Another important parasite belongs to the subfamily Encyrtime, and 

 has recently been named by the writer Atropates collinsi in honor of 

 Mr. Lewis Collins, secretary of the Brooklyn Tree Planting and Foun- 

 tain Society, who has had to fight the cottony cushion scale and has 

 been greatly interested in its study. The Atropates was reared at 

 Washington in 1889 and 1891 from females of Pulvinaria innumerabilis 

 received from Mr. Collins and from L. H. West, of Eoslyn, ^N". Y. All 

 of the parasites issued late in July. 



Still another parasite is the Eunotus lividus Ashm., a single specimen 

 of which was reared March 4, 1899, from specimens of Pulvinaria 

 received from Mr. Collins. This insect belongs to a curious and dis- 



Fi< 



10. — Eunotus lividus, greatly enlarged, with male and female antennae above — still more enlarged, 

 and cocoons nnder old scale at left, also enlarged (original). 



tinct group of the subfamily Pireuime, all of the species of which, 

 from all of the specimens that the writer has been able to determine 

 from oriental forms, are parasitic upon the large scale insects. Other 

 specimens were reared April 12 and April 18 from old scales found 

 upon maples on the grounds of the Department of Agriculture, and 

 examination of the host insects showed a point of interest in the 

 biology of the parasite. The early stages of Eunotus and its allies 

 have not hitherto been observed, but these specimens issued from a 

 small bunch of coarse but stout cocoons which had been spun under 

 the body of the Pulvinaria. 1 A characteristic bunch of these cocoons 

 is shown at fig. 10. 



1 Mr. Pergande has called the writer's attentiou to an interesting fact which shows 

 that Fitch just escaped rearing Eunotus many years ago. In his Third Report on the 

 Insects of New York, published in 1859 (p. 109), he describes Lecanium ribis, and states 



