268 Journal New York Entomological Society. [Voi. xxi. 



Agromyza parvicornis Loew, The veins are usually yellowish, 

 especially pronounced on the basal half of the wing. The arista is 

 visibly pubescent and fully two and one half times as long as the 

 antenna. See note under neptis. 



Agromyza sorosis Williston. I have a specimen received from 

 Dr. Williston's collection, from Piedro Blanca, Bolivia, April, which 

 has the pubescence of the arista more distinct than in the specimens 

 from the states. 



Agromyza sulphuriceps Strobl. Although I have no European 

 material for comparison, I place six specimens from Troy, Idaho, and 

 Kamiac Butte, Washington, in this species. They agree so thoroughly 

 with Professor Strobl's description that it would add nothing to the 

 knowledge of this genus to bestow a new name on these flies. The 

 species is apparently very close to varifrons Coquillett, and possibly 

 is the same. The differences given in the table, all that is tangible 

 in the descriptions, are probably more apparent on paper than real in 

 nature. 



Agromyza taeniola Coquillett. This may be a variation of grossi- 

 cornis. Coquillett's type from California has three dorsocentrals, the 

 third antennal joint very small and the mesonotum not pruinose. I 

 have specimens that agree in other particulars with the description of 

 tccniola, but have four dorsocentrals of varying size, and the meso- 

 notum lightly pollinose. 



Agromyza tilise Couden. This species was described from mate- 

 rial reared from stem galls of the American linden. It is very close 

 to simplex according to Coquillett and Couden, the only discernible 

 differences being the position of the frontal bristles and the shape of 

 the ocellar triangle. As both of these characters are quite variable 

 in other species of this genus, the form tilia: may be included with 

 simplex as variations of the broad species niaura. The shining frontal 

 triangle is large, elongate and has its sides concave; the lower four 

 frontal bristles are close together and well separated from the upper 

 bristle. The two sections of the fifth vein are equal, as in simplex, 

 but the space between the crossveins is greater, ranging from one 

 half to nearly the length of the posterior crossvein. I have a speci- 

 men presumably belonging here, from Montreal Island, Quebec, re- 

 ceived from G. Chagnon. The lower frontal bristles, however, are 

 not so crowded as pictured for tilicc. The specimen has the frontal 



