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Elis ATRIVENTRIS Gahan 
This species (Fig. 13) was described and referred to as a parasite 
of Phyllophaga by Mr. A. B. Gahan (29), the specimen having been 
reared by Mr. C. N. Ainslie from cocoons collected at Elk Point, S. 
Dak., April 19. According to the original notes some of these cocoons 
bore Phyllophaga remains; but since several species (E. atriventris, E. 
5-cincta, and E. illinotsensis) were reared from the lot it was not defi- 
nitely shown that this species was parasitic. However, the writer has 
since reared EF. atriventris from cocoons collected at Lafayette, Ind., 
which bore unmistakable remains of Phyllophaga grubs, and from 
we 
Fic. 13. Elis atriventris Gahan, female: a, lateral view of tip of abdomen of male, 
showing stylus. 
cocoons, bearing like evidence, collected at Ashboro, Ind., which facts 
give us reasonable assurance of the truly parasitic habits of this species. 
The adults issue during July and are to be found in company with 
5-cincta feeding on such flowers as white sweet clover. 
ELIS INTERRUPTA Say 
We have reared E. interrupta from cocoons collected at Hoopeston, 
Ill., and Lafayette, Ind., the adults issuing July 30 and September 6, 
