Apr. is. 1914 
Corn-Leaf Blotch Miner 
29 
Pteromalidae. —There are at least two species of parasites belonging to 
the Pteromalidae that have been reared from Agromyza parvicornis at 
Richmond and La Fayette, Ind. Both species may be and probably are 
new, but as there is only a limited amount of material they can not be 
placed with certainty. These parasites are mounted under Webster 
Nos. 3814 and 3857. 
Opius diastatae Ashm.—This parasite (PI. IV, fig. 2) was reared from a 
corn leaf-miner at La Fayette, Ind., in 1886, by Prof. Webster, andfrom a 
miner in corn leaves at Jacksonville, Fla., the same year by Ashmead. 
It was described by Ashmead (1888) as Bracon diastatae , and Gahan 
(1913) has placed it under the genus Opius. It is recorded in Insect 
Life 1 as being reared from Diastata , n. sp., which was very probably 
A gromyza parvicornis . 
Opius succineus Gahan.—This is a new species recently described by 
Mr. A. B. Gahan (1913) of the Bureau of Entomology (Pi. IV, fig. 3). It 
was recorded from puparia by the author and Mr. Philip Luginbill from 
La Fayette, Ind., in 1912, and by Mr. 
J. J. Davis from Danville, Ill., dur¬ 
ing the same year. It was not very 
abundant, and nothing is known of 
its life history. 
Opius utahensis Gahan.—This 
species (PI. V, fig. 2) is new also, hav- Fig. 6 .—Pleurotropis utahensis . a parasite of 
ing been described recently by Mr. Much enlarged * 
Gahan (1913) from Salt Lake City. 
Mr. C. N. Ainslie reared this species sparingly from the locality just cited, 
from Agromyza parvicornis. Nothing is known of its life history. 
Elachertinae. —An unidentified species of the subfamily Elachertinae 
was reared from a miner in Panicum multifolia at Urbana, Ill., in 1902, 
by Prof. Webster. As large numbers of Derostenus diastatae were reared 
from the same host at the same time and as this latter is the most 
important parasite of Agromyza parvicornis , it was thought well to men¬ 
tion in this connection the rearing of this unidentified species, which 
bears Webster No. 1896. 
Macroglenes sp.—Mr. C. N. Ainslie reared a species of Macroglenes 
from a leaf-miner in corn at East Grand Forks, Minn. There is no way 
of knowing what miner was concerned, and this species as well as the 
foregoing is listed here mainly to establish a record of the rearings. The 
specimens bear Webster No. 4309. 
REMEDIAL MEASURES 
As no occasion demanding remedial measures has thus far arisen, little 
can be said on this subject. The ordinary means of control would appear 
1 Some of the bred parasitic Hymenoptera in the national collection. U. S. Dept. Agr., Div. Ent., Insect 
Eife, v. 2. no. 11/12, p. 348-353. 1890. “Bracon diastatae Ashm., 1 * p. 348. 
