46 Agkicdltueal Expekiment Station, Ithaca, N. Y. 



In his Seventh Report (1891), Dr. Lintner speaks of a second brood 

 of larva3 working on the leaves during July. This is misleading, for 

 these larvse are simply the early stages of the same brood of larvae 

 which will appear upon the buds next sjjring. There is only one brood 

 a year, but the larval period extending over a part of two years causes 

 the larvae of two different broods to ajipear during the same calendar 

 year. 



Natubal Enemies of the Pest. 



This pest, like many of our insect foes, has its natural enemies which 

 help to hold it in check. There are several parasitic insects belonging 

 to the Hymenoptera which prey upon the larvae of the Bud Moth. 

 They are all active wasp-like insects, scarcely one-fourth of an inch in 

 length. 



Taschenberg records the following five species of parasites as preying 

 upon the insect in Europe: Chelonus nigrinns and siinilis, Microdus 

 rajipes, Mesochorics dilutus, and Lissonota cuUciformis. 



In this countr}^ but three species seem to be at work upon the pest. 

 Dr. Fernald saj^s (Bull. 12 Mass. Hatch Agr. Expt Sta., 1891): "Some 

 years ago I found a most curious parasite attacking the larvae of this 

 species. It was a Hymenopterous insect of a pea-green color, and was 

 attached to the top and across the second segment of the larva, on the 

 outside and entirely out of the way of harm; there it grew fat at the 

 expense of its host which died a lingering death. The parasite was 

 determined for me by Mr. E. T. Cresson as Phytodlctiis vidgaris Cr." 

 In July, 1892, we reared two species of these small Hymenoptera from 

 the larvae of the Bud Moth. Dr. Riley says of them: "One of them 

 proves to be a Plmpla near P. alboricta Cr., the main difference being 

 in the color of the clypeus. It is not likely that it is an undescribed 

 species and may prove to be one of the forms described by Provancher. 

 The other is 3ficrodus laticinctus Cr. Microdus laticinctus seems to 

 be quite a common parasite, as Dr. Riley bred it from larva? received 

 from Canada in 1870, and again in 1879, at Washington, D. C. Prof. 

 A. J. Cook says (An. Rept. Mich. Agr. Expt. Sta., 1891): "We reared 

 from the Bud Moth the parasite 3ficrodus laticinctus, which is very 

 common, and will surely do much to stay the ravages of this pest." 



Besides these parasitic enemies, the Bud Moth has a ])redaceous 

 insect foe in the form of one of the large wasps, Odynerus catsJcill- 

 ensis. This wasp builds mud nests or cells in angular places 

 about houses. In each cell it deposits an egg and then goes on a 

 foraging expedition to get food with which to store the cell. This 

 food often consists of caterpillars, which are paralyzed but not 



