50 
the second molt, three days, and from the seeond molt to the time of 
spinning the cocoon, five days. Several individuals which were kept 
under observation at this office transformed from larva to pupa June 
23, and the moths issued July 4, having passed eleven days as pupe. 
Of the number of generations of this insect Mr. Coquillett observed 
that there appeared to be only two broods in a season in the latitude of 
Woodstock, Il., and Professor Comstock says there are certainly two 
and perhaps three broods in a season. The writer’s observations tend 
to show at least three well-marked generations for the latitude of the 
District of Columbia, the first generation usually developing toward 
the middle of June, the second early in August, and the third some- 
time late in September or early in October. There is no indication, 
however, of any great regularity in the issuance of the moths, since 
they have been reared at this office at various other times than on the 
dates mentioned. The exact dates of issuance as recorded in our 
notes are: June 12, 15, 23, 28, 30; July 4, 8, 16; August 1; Septem- 
ber 2, 5, 6, 25, 27. Moths, however, as has previously been observed, 
have been found much earlier than in June and as late as the first week 
of December, at the latter time on several occasions, once when the 
thermometer registered 54° F. 
NATURAL ENEMIES. 
A single parasite was reared from the pupa of this moth September 
7, 1899, and on being referred to Mr. Coquillett was identified as the 
the Tachinid fly, Hvorista blanda O.-S. This is the second natural 
enemy that has been observed for the green clover worm to the 
writer’s knowledge, the other being a chalcis fly, Huplectrus platyhy- 
penw How. The latter was reared at this office July 11, 1882, from 
material from the District of Columbia. (Bul. 5,0. s., Div. Ent., p. 27.) 
REMEDIAL TREATMENT. 
Ordinarily the injuries effected by this clover worm are so inconsid- 
erable as not to necessitate any special line of treatment. It is one of 
several common insects that live habitually on clover and which by 
their combined effort devour a certain proportion of the clover crop 
over considerable territory. Poisons are, of course, out of the ques- 
tion in pasture land and in clover fields, and on lawns there can be 
little doubt that frequent mowing with a lawn mower is all that is 
necessary, since the insects live freely exposed upon their food plants 
during the day and do not resort to the plans of concealment resorted 
to by cutworms. 
