6 4 
Journal of Agricultural Research 
Vol. I, No. i 
Vetch ( Vida sp.): 
Columbia, S. C., June 15, 1913 (Philip Luginbill). 
Sweet pea ( Lathyrus odoratus ): 
Tempe, Ariz., May 24, 1912 (V. L. Wildermuth); Sacaton, Ariz., May 25, 1912 
(R. N. Wilson); Salt Lake City, Utah, June, 1911 (C. N. Ainslie). 
Fenugreek ( Trigonella foenum-graecum): 
Salt Lake City, Utah, July 22, 1911 (T. H. Parks). 
White clover ( Trifolium repens , PI. V, fig. 2): 
Washington, D. C., June, 1879 (Theo. Pergande); Oxford, Ind., 1884 (F. M. Web¬ 
ster); Washington, D. C., September n, 1907 (C. N. Ainslie); Salt Lake City, Utah, 
1911-12 (C. N. Ainslie and T. H. Parks); Lyman, Wyo., July 14, 1911 (T. H. Parks). 
Red clover ( Trifolium pratense): 
Salt Lake City, Utah, June to September, 1911 (T. H. Parks); Twin Falls, 
Idaho, July, 1912 (T. H. Parks). 
Sweet clover (Melilotus officinalis ): 
Tempe, Ariz., May 14, 1912 (V. L. Wildermuth). 
Rape ( Brassica napus , PI. V, fig. 1): 
La Fayette, Ind., 1909 (W. J. Phillips); La Fayette, Ind., 1911 and 1912 (W. J. 
Phillips and Philip Luginbill). 
Cowpea ( Vigna unguiculata ): 
Batesburg, S. C., July 12, 1904 (E. G. Titus); Lakeland, Fla., May 8, 1912 (G. G. 
Ainslie; La Fayette, Ind., July and August, 1912 (Philip Luginbill); Columbia, 
S. C., July 10, 1908 (G. G. Ainslie), September n, 1912 (Philip Luginbill), Como, 
Miss., August, 1912 (T. H. Parks). 
Cotton ( Gossypium barbadense): 
Batesburg, S. C., 1912 (E. A. McGregor); Dallas, Tex., 1912 (A. Rutherford). 
Tobacco ( Nicotiana sp.): 
Chatham, Va., July, 1906 (W. W. Green). 
Hedge mustard ( Sisymbrium officinale) : 
Washington, D. C., June, 1900 (F. H. Chittenden and Theo. Pergande); Welling¬ 
ton, Kans., May, 1912 (E. O. G. Kelly). 
Smooth rock cress (Arabis laevigata ): 
Washington, D. C., June, 1900 (F. H. Chittenden and Theo. Pergande). 
Plantain ( Plantago sp.): 
Salt Lake City, Utah, July, 1912 (C. N. Ainslie). 
Common mallow ( Malva rotundifolia ): 
Tempe, Ariz., October, 1911 (V. L. Wildermuth). 
The great variety in the food plants of the larvae, together with the 
fact that the peculiar shaped but rather inconspicuous larval mines in 
the leaves (PL V, figs, i and 3) do not readily attract attention except 
when excessively abundant, leads to the suspicion that the insect may 
occur unobserved in many localities not indicated on the map (fig. 3). 
This is perhaps especially true throughout the West wherever it becomes 
sufficiently abundant in alfalfa fields to be a pest. Therefore, in this 
paper, it is considered with special reference to alfalfa culture. 
RECORDS OF THE BUREAU OF ENTOMOLOGY 
The earliest published record of this insect was by the late Dr. C. V. 
Riley, who appears to have first reared the fly from larval mines in the 
lower leaves of potato received from Foristell, Mo., June 3, 1876, other 
individuals issuing later. At that time it was supposed to be an Oscinis. 
