fi 
had described two as Trichogramma orgyie and T. fraterna. The first 
of these, however, seems to be a Cratotechus which has not since been 
reared, while the second is a hyperparasite of the genus Holcopelte. 
There is not the slightest evidence, however, that this second parasite 
ever attacks the tussock moth, since Fitch simply found it walking upon 
rose leaves in September, ‘“‘ where,” he says, “it was very probably 
searching for these same caterpillars in which to deposit its eggs.” 
Riley reared Pimpla inquisitor, an undetermined Tachinid fly, a true 
egg parasite of the genus Telenomus, and two species of the genus 
Pteromalus, while he also obtained cocoons of a Microgaster from tus- 
sock-moth caterpillars, without, however, rearing the adult. The adult 
of what is probably this species was reared later by Prof. F. M. Webster 
and was described by Mr. Ashmead as Apanteles orgyice (Bull. Ohio Exp. 
Sta., Tech. Ser. I, p. 159). Dr. Weed records (Psyche, V, 51) Pimpla 
conquisitor Say, Normal, Ill., July 14, 1885. Dr. Lintner is also said 
to have reared a species of Tetrastichus from this larva. This last 
species is undoubtedly hyperparasitic, and one if not both of the two 
species recorded as belonging to the genus Pteromalus are also probably. 
hyperparasites. 
The close observations which were made upon abundant material 
beginning early in August, 1895, and carried through until the autumn 
of 1896, have resulted not only in vastly increasing this list, but in giv- 
ing us some definite ideas as to the habits of the species involved and 
as to their more or less intricate interrelations. 
The species reared are as follows: 
LIST OF PRIMARY PARASITES. 
A.—Hymenoptera. 
Pimpla inquisitor Say. Theronia fulvescens Brullé. 
Pimpla conquisitor Say. Apanteles delicatus n. sp. 
Pimpla annulipes Say. Apanteles hyphantrie Riley. 
Amorphota orgylie n. sp. Chalcis ovata Say. 
Meteorus communis Cresson. Pteromalus cuproideus n. sp. 
Meteorus hyphantriew Riley. Cratotechus orgyiw Fitch. 
Limneria sp. Telenomus orgyiwe Fitch, 
Limneria valida Cresson. 
B.—Diptera. 
Frontina aletiw Riley. Euphorocera claripennis Macq. 
Frontina frenchii Will. Exorista griseomivans V. d. W. 
Tachina mella Walk. Winthemia 4-pustulata Fab. 
LIST OF HYPERPARASITES. 
Hymenoptera. 
Hemiteles townsendi Ashmead. Spilochalcis debilis (Say). 
Bathythrix meteori n. sp. Kupelmus limnerize n. sp. 
Bathythrix pimple n. sp. Dibrachys boucheanus (Ratz.). 
Adistola americana n. sp. Elachistus caccocie How. 
Otacustes periliti Ashm. Elasmus atratus n. sp. 
Habrocytus thyridopterigis Ashin. Syntomosphyrum esurus (!iley). 
Pezomachus insolitus n, sp. Asecodes albitarsis Ashm, 
