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they had arranged themselves in a circular row and had changed to pupse of a milk- 
white color, 0.12 [inch] long and half as broad, hanging by their tails, with their heads 
downward and their backs against the side of the box. This was upon the last day 
of July. Next day they had changed to a pale red color and had somewhat shriveled, 
each having discharged a little cluster of clay-yellow grains, which were adhering to 
the side of the box at the tip of their bodies. They subsequently altered to a black 
color, and on the 6th of August they hatched the winged insects, which were of a 
brilliant brassy-green color, with a blackish-purple abdomen and white legs, and 
about the same size as the pupae. 
Both Dr. Fitch's account of the method of transformation and an 
examination of the fragmentary specimens still remaining in his collec- 
tion, now in the possession of the United States National Museum, 
indicate that this parasite belongs to the genus Cratotechus. 
Fig. 13.— Cratotechus orgyice : Pupae in sitv below, with greatly enlarged pupa above (original). 
In December, 1896, a few specimens of the pupae of a Cratotechus 
or some closely allied Eulophine genus were found among the cocoons 
of an Orgyia, and we assume that they belong to this species. Efforts 
to rear the adult, however, have failed up to the time of writing since 
all, or nearly all, had been stung by a hyperparasite— Elachistus cacce- 
cia\ A group of seven of these pupae attached to a leaf about the 
shriveled remains of a half-grown Hyphantria larva is shown at fig. 13, 
while one of the pupa3 enlarged is illustrated in the same figure. 
These exposed pup* of Cratotechus are frequently in other instances 
parasitized by species of Tetrastichus, and it is possible that the species 
of this genus reared by Dr. Liutner has for its true host Cratotechus 
orgyice. 
