106 
terna, fusca, futilis (=gibbosa), hirticula, ilicis, iuplicita, and vehemens, 
collected from Illinois, Indiana, Missouri, Wisccnsin, and Virginia, as 
follows: St. Louis, Mo. (Phil. Rau); Charlottesville, Va., (H. Fox 
and W. J. Phillips); and from Milford and Sheldon, Ill., Lafayette, 
Orleans, Princeton, and Vincennes, Ind., and Lancaster, Wis. (members 
of the Lafayette Station staff, including R. J. Kewley, D. G. Tower, A. 
F. Satterthwait, H. J. Hart, F. A. Fenton, S. L. Mason, and the writer). 
In addition we have found puparia of this species in the bodies of P. 
lurtiventris and P. calceata collected in 1914 at Pauls Valley and Shaw- 
nee, Okla., respectively, by Mr. W. E. Pennington, the parasitized beetles 
being among a lot which had previously been caged for eggs and later 
sent in for determination. An empty wndata puparium was found in 
the body of a dead female P. hirticula picked up behind the plow by Mr. 
C. M. Packard at Hagerstown, Md. Other distribution records of P. 
undata in our files include Tempe, Ariz. (V. L. Wildermuth), Ithaca, 
N. Y., and Indianapolis, Ind. (H. Morrison), and New Haven, Conn., 
and Linglestown, Pa. (Champlain). The dates of emergence according 
to our 166 rearing records are May 8 to May 30, and in the field we 
find the species most common about May 20-24. Female beetles are 
much more frequently parasitized than males, and there appears to be 
some evidence that male flies are more frequently produced in the smaller 
species of beetles; in other words, the supply of food appears to have an 
influence in determining sex. 
Pyrgota valida was bred from thirteen species of May-beetles, 
namely, P. anxia (=dubia), balia, calceata, crassissima, crenulata, 
fervida (=arcuata), fusca, futilis, (—=gibbosa), hirticula, implicita, 
inversa, rugosa, and tristis collected as follows: Strathroy and Wilton 
Grove, Ontario, Can. (collected by H. G. Crawford), Manhattan, Kan. 
(J. W. McColloch), Wakeman, O. (W. B. Hall), and Sheldon, IIl., 
Lafayette and Orleans, Ind., Battle Creek, Farmington, Holland, Imlay 
City, and Port Huron, Mich., and College Station, Tex. (members of 
Lafayette Station staff, including D. G. Tower, H. J. Hart, A. F. Satter- 
thwait, R. J. Kewley, F. A. Fenton, S. L. Mason, and the writer). In 
addition a puparium of this species was found in the body of a female 
P. calceata obtained at Shawnee, Okla., in 1914 by W. E. Pennington. 
In literature it has been recorded from New York to Illinois, and Mr. 
E. G: Kelly has collected the adult at Wellington, Kansas. The adult 
of valida emerged, according to our 95 cage records, much earlier than 
undata, that is from April 23 to June 5, and out-of-doors it is found 
most often early in May, although we have taken it at Lafayette, Ind., 
as late as May 25, while collecting beetles from trees at night. P. valida, 
as in the case of undata, has a one-year life cycle, only one larva de- 
velops in a beetle, and females seem to be more readily subject to attack 
than males, although this tendency is more marked in our uwndata records. 
Both species frequent trees at night where the beetles are feeding, 
and both sexes are often attracted to electric lights, sometimes in very 
conspicuous numbers. 
Ee 
