434 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io8 



Frost's specimens from Prunus serotina Ehrh. and Diervilla lonicera, 

 so I restrict the species to peach at this time. I have seen specimens 

 from Ohio, Virginia, Connecticut, and Ontario. 



Phytomyza plantaginis Robineau-Desvoidy 



Phytomyza plantaginis Robineau-Desvoidy, Rev. Mag. ZooL, ser. 2, vol. 3. p. 404, 

 1851, — Frost, Mem. Cornell Univ. Agr. Exp. Sta., vol. 78, p. 82, 1924 (figure 

 of leaf mine). — Hendel, in Lindner, Die Fliegen der palaearktischen Region, 

 fam. 59, p. 455, 1935 (figures of head and wing). 



Phytomyza genualis Loew, Berliner Ent. Zeitschr., vol. 13, p. 52, 1869 (Centuria 

 VIII, No. 100). 



Phytomyza crassiseta (Zetterstedt) , Melander (part), Journ. New York Ent. Soc, 

 vol. 21, p. 271, 1913 (2 9 9, White Plains, N. Y., and Collins, Idaho.). 



This species has the frons and first and second antennal segments 

 yellow, the third antennal segment, mesonotal margins, scutellum, 

 and femora dark, and the forecoxa distally yellow. There are two 

 equally strong upper-orbitals and two rows of acrostichals. It differs 

 from Phytomyza subtenella in having only one strong lower-orbital 

 and the lack of an inner postalar. The larvae make serpentine mines 

 in the leaves of Plantago spp. I have seen this Holarctic species from 

 many widely scattered States throughout the United States. 



Phytomyza plumiseta Frost 



Phytomyza plumiseta Frost, Mem. Cornell Univ. Agr. Exp. Sta., vol. 78, p. 87, 

 1924; Ann. Ent. Soc. Amer., vol. 23, p. 460, 1930. 



The holotype female is in the U. S. National Museum (No. 

 50027). Phytomyza plumiseta belongs to the assemblage of species 

 that has a yellow frons, dark third antennal segment, scutellum, and 

 femora, and the mesonotum bordered with yellow. Like P. delphinii, 

 this species has both upper-orbitals of equal length and strength. 

 P. plumiseta has a narrow gena (medially about one-eighth the eye 

 height) (fig. 164), the tarsi yellow, and the mesonotum subshining. 

 The wing is illustrated to show the undulating E2+3 and straight M1+2 

 (fig. 165), The larvae make blotch mines in the leaves of Thalictrum 

 polygamum Muhl. and other Thalictrum spp. in Pennsylvania. 



Phytomyza ranunculi (Schrank) 



Musca ranunculi Schrank, Fauna Boica, vol. 3, p. 140, 1803. 



Phytomyza ranunculi (Schrank), Hendel, in Lindner, Die Fliegen der palaearkti- 

 schen Region, fam. 59, p. 463, 1935 (figures of head and wing). — Hering, 

 Entomon, vol. 1, p. 207, 1949. 



This species is one in a group of species having a yellow frons and 

 scutellum and dark third antennal segment. The dorsal upper- 

 orbital is definitely shorter than the ventral. Hendel (1935) proposed 

 several varieties in order to distinguish the seasonal color phases of 



