124 ENTOMOLOGICAL SOCIETY 



lorus ater, Anacharis ensifer, and Ephialtes gracilis. The first 

 three have been reared by Brischke from undetermined species 

 of Chrysopa, and the last by Ratzeburg from an undetermined 

 species of Hemerobius. Of secondary parasites five species of 

 ffemiitleS) H. castaneus, H. areator, H. limbatus, H. testivalis, 

 H. sp., have been reared by Brischke, Giraud and Ratzeburg 

 from cocoons of either Chrysopa or Hemerobiiis. 



In this country >we have an egg-parasite of either Chrysopa 

 or Hemerobins. I exhibited specimens of this an exceedingly 

 minute Telenomus at the first meeting of this Society, April 3, 

 1884. Three secondary parasites have also been reared from 

 larva or cocoon by Prof. Riley. These are Hemiteles heme- 

 robiicola Ashm., H. rufiventris Riley MS., and Mesochorus (f) 

 chrysopce Ashm. Precisely what their primary parasites are in 

 America, however, has not been previously known, although 

 it is fair to suppose that our species of the abnormal procto- 

 trupid genus Helorus (of which we have several) will be 

 ultimately found to have this habit. The recent unpublished 

 notes of the Division of Entomology, however, indicate that 

 we have one most interesting and widespread primary parasite 

 in Isodromus iceryts M., originally described (without doubt 

 erroneously) as a parasite of Icerya purchasi. This handsome 

 little Chalcidid has been reared since 1887 from Chrysopa 

 cocoons received from Los Angeles, Cal., from Kirkwood, Mo., 

 and from Umatilla, Fla., as well as from others found upon 

 the grounds of the Department of Agriculture at Washington. 

 Moreover, I am rather of the opinion that this is the insect 

 illustrated by Glover at figure 45, plate III, of his report for 

 1877, an d concerning which he says (p. 99) : 



" Aphelinus is a small parasitic fly, which was found de 

 stroying Chrysopa, a neuropterous insect, which was bred in 

 Maryland and formed a cocoon on a small shrub. ' ' 



The figure could not have been drawn from a true Aphclinus, 

 but it is quite possible, from structural detail and general ap 

 pearance, that Glover had Isodromus before him. I described 

 this latter genus in the Annual Report of the Department of 

 Agriculture for 1886 (p. 488), and the type is illustrated at 

 figure i, plate III, of the same report. 



Mr. Schwarz remarked that in consequence of the extraor 

 dinary abundance of Aphids during the past spring and early 

 summer, the larvae of Chrysopa and various Coccinellids were 

 likewise unusually numerous on the trees in the Smithsonian 

 grounds. On one Linden tree the supply of Aphids gave out, 



