i6 
Journal of Agricultural Research 
Vol. II, No. i 
paper, changing the name to A . parvicornis; however, this correction 
appears never to have been published. The specimens have been exam¬ 
ined by Mr. J. R. Malloch, recently of the Bureau of Entomology, who 
sustains the opinion of Coquillett. This is the only recorded injury that 
can be fixed with absolute certainty upon this latter species, although 
there is a record of the rearing of parasites from a leaf-miner on corn at 
Jacksonville, Fla., and a similar record by Prof. F. M. Webster at 
La Fayette, Ind.—both in 1886. The miner in both of these instances 
was probably A . parvicornis , as in these two records published in Insect 
Life 1 the host is given as Diastata , n. sp. 
Wherever the work of a miner in corn leaves is mentioned the writer 
will state that it is probably Agromyza parvicornis , if the notes clearly 
state that it is a “ blotch miner,” since there is no other species of blotch 
miner known at this time to occur in corn leaves. This will explain why 
the work is attributed to this species, even when material has not been 
reared. 
Dr. W. D. Hunter, in charge of Investigations of Insects Affecting 
Southern Field Crops in the Bureau of Entomology, collected this species 
at Victoria, Tex., in 1903, and Mr. E. S. Tucker, then of the same office, 
found it at Plano, Tex., in 1907. 
The writer’s attention was first called to this leaf-miner in June, 1908, 
at Richmond, Ind. While walking through a cornfield, it was noticed 
that the tips of some of the leaves appeared colorless, a few having a 
scorched appearance. Upon closer examination it was found that the 
tips of these leaves contained footless maggots which were devouring 
all the tissue between the two surfaces of the leaf, leaving it with a 
sickly, colorless appearance. Some of these larvae were reared to adults 
and determined as Agromyza parvicornis . 
Mr. C. N. Ainslie, of the Bureau of Entomology, noticed a leaf-miner 
in com at East Grand Forks, Minn., in August, 1907, but reared only 
parasites. This may have been the same species as that found at Rich¬ 
mond, Ind., but, as no description of the mine was given, it is hazardous 
even to make a guess. 
Mr. G. G. Ainslie, of the Bureau of Entomology, observed the work of 
a miner in com leaves at Monetta, S. C., in May, 1908, and at Spartan¬ 
burg and Clemson College, S. C., in June of the same year; but no adult 
flies were reared, although parasites were reared at Monetta and Clemson 
College. The species grown at Monetta, at least, was very probably 
Agromyza parvicornis , since its work was described as a “ blotch mine.” 
Mr. Ainslie reared adults of this species from corn at Marion, S. C., in 
May, 1909. Parasites were very numerous here, and only a few miners 
completed their development. A number of parasites were reared by 
Mr. Ainslie from a leaf-miner in com leaves at Hurricane Mills, Tenn., 
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. j.890. “Bracon diastatae Ashm.,” p. 348. 
