298 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
At Elizabeth City on August 14 the writer entered in his notes with 
reference to the then maturing brood of larvae, that bacterial disease 
had killed many and might be a factor with the next brood; that 
perhaps 25 had been seen affected with fungous disease, not over two 
had been seen giving evidence of internal insect parasites, and that one 
paper-nest wasp ( Polistes sp.) had been captured in the act of devour¬ 
ing a larva. 
Rearings from 77 collected pupae at Elizabeth City by the writer 
gave a total of 54 moths and 3 parasites. Fifty-six larvae caged when 
grown or nearly so yielded 20 moths and no parasites. 
At Terra Ceia Mr. Leiby secured a higher percentage of parasites 
from the pupae. 
When eggs began to appear rearings from these were begun and here 
was found the most important parasite factor at both stations. Ap¬ 
proximately 50 per cent of the eggs turned to a dull black and yielded 
the egg-parasite, Trichogramma pretiosa, determined by Mr. Crawford 
at Washington. 
A cage was started by the writer with 19 eggs collected in various 
parts of the field: 10 young larvae hatched; two egg-shells were re¬ 
moved without finding larvae, while the other seven eggs yielded 12 
specimens of T. pretiosa. 
Four cages operated by the writer contained eggs which appeared 
to be parasitized. These resulted as follows: 
(Cage 1) 3 eggs of P. scabra yielded 7 specimens of T. pretiosa 
(Cage 2) 8 eggs of P. scabra yielded 11 specimens of T. pretiosa 
(Cage 3) 7 eggs of P. scabra yielded 12 specimens of T. pretiosa 
(Cage 4) 1 egg of P. scabra yielded 3 specimens of T. pretiosa 
The largest number of T. pretiosa reared from a single egg of the host 
was three. Mr. Leiby accomplished the same result at Terra Ceia. 
It is plain that the emergence of two adults of the parasite from one 
egg of the host is common, and that three is not rare. These findings 
give to T. pretiosa the undisputed first place among the parasites of the 
green clover worm on soy beans in eastern North Carolina in 1919. 
The second parasite in importance was the Tachinid, Phorocera 
claripennis , of which Mr. Leiby reared 17 specimens at Terra Ceia, 
none being secured by the writer at Elizabeth City. It may here be 
noted that in our state this fly is the second most prevalent parasite of 
the true army-worm, which was in evidence where these studies were 
made. 
The writer and Mr. Leiby each reared one specimen of the Tachinid, 
Exorista boarmice, and Mr. Leiby reared one each of Frontina aletice 
and Euphorocera floridensis. Of other flies the writer reared one of 
