114 
E. exile may be distinguished in the larval and pupal stages from 
other parasites of May-beetles by the characteristic posterior spiracles, 
illustrated in Figure 42 
b 
Fic. 42. Hutrixa exile Coqg., puparium from which adult 
has issued; a, posterior spiracles, much enlarged ; 
b, anal end, showing posterior position or posterior 
spiracles, 
BfoMyYIA LACHNOSTERNAE Towns. 
Biomyia lachnosternae was first reared by the writer in 1905 from 
an adult Phyllophaga crenulata taken at Urbana, Ill., and was recorded 
by Dr. S. A. Forbes (26) as a species of Viviana. This was later de- 
scribed by Mr. C. H. T. Townsend as a new species under the name 
V. lachnosternae (75). The beetle referred to above was obtained July 
15, laid three eggs after being placed in a flower-pot cage, and died 
about July 29, the fly (Fig. 43) issuing August 5, after the beetle had 
been pinned. We have also reared it from beetles collected in Missis- 
sippi, South Carolina, and Virginia, and it is apparently typically a mem- 
ber of the southern fauna. 
In our rearing experiments we have bred this parasite from 89 
beetles representing nine species of Phyllophaga, namely, P. calceata, 
ephilda (=burmeisteri), forbesi, forsteri (—=nova), luctuosa, prunun- 
culina, quercus, vehemens, and new species b. The beetles from 
which they were reared were collected at Agricultural College, Miss. 
(collected by students through the courtesy of Professor R. W. Harned), 
Greenwood, Miss. (collected by J. M. Langston); Gulfport, Miss. (C. 
C. Greer) ; Columbia, S. C. (Philip Luginbill) ; and Charlottesville and 
Tappahannock, Va. (H. Fox). It differs from the two preceding in 
that not more than one maggot normally develops in a single beetle, 
only one case having been observed in which as many as two flies came 
from the same host, and according to all our records the adults invari- 
ably issue within 45 days of the time when they were collected and 
caged. We have not studied the species under conditions occurring 
in the Southern States, its normal habitat, but the evidence at hand 
