AGROMYZID LEAF MINERS — FRICK 415 



Oklahoma, Missouri, Michigan, Indiana, Kentucky, Tennessee, 

 Maryland, and New Hampshire as well as from British Columbia and 

 Manitoba. 



Phytoliriomyza perpusilla (Meigen) 



Agromyza perpusilla Meigen, Systematische Beschreibung der bekannten euro- 

 paischen zweifltigeligen Insekten, vol. 6, p. 181, 1830. 



Phytoliriomyza perpusilla (Meigen), Hendel, in Lindner, Die Fliegen der palae- 

 arktischen Region, fam. 59, p. 303, 1931 (figures of head and wing). — Frick, 

 Univ. California Publ. Ent., vol. 8, p. 411, 19.52 (figure of wing). 



This is the most yellow of the three species and the abdominal ter- 

 gites are mostly yellow when viewed laterally. The wing has the 

 ultimate section of M3^.4 twice as long as the penultimate. Appar- 

 ently rare, I have seen specimens from California, Washington, 

 Montana, and New Mexico. 



11. Genus Xyraeomyia Frick 



Xyraeomyia Frick, Univ. California Publ. Ent., vol. 8, p. 412, 1952 (figure of 

 wing). 



This genus was erected for a single species that is very closely re- 

 lated to Phytoliriomyza. Xyraeomyia and Phytoliriomyza form a con- 

 necting link between the more generalized genera and the more spe- 

 cialized genera related to Phytomyza (Frick, 1952). However, 

 Xyraeomyia is the more specialized of the two in having the axillary 

 lobe and calypter greatly reduced, crossvein m-m absent, and no 

 acrostichals. The head has the eye forwardly inclined, the orbital 

 setulae proclinate, and a relatively long arista (fig. 130). 



Xyraeomyia conjunctimontis Frick 



Xyraeomyia conjunctimontis Frick, Univ. California Publ. Ent., vol. 8, p. 413, 

 1952 (figure of wing). 



This is a small species (1.15 to 1.3 mm. in wing length) that is yellow 

 and brown, the latter being dull gray pollinose. The head has the eye 

 forwardly inclined and an extremely long arista (fig. 130). The arista 

 is slightly longer than the eye is high. The eye is setulose but the 

 setulae are very short. There are no setulae on the mesonotum other 

 than in the dorsocentral rows and the calypter is reduced to a narrow 

 strip with brown margin and fringe. The type series, from central 

 California, was swept. 



12. Genus Phytagromyza Hendel 



Fhytagromyza Hendel, Arch. Naturg., Abt. a, vol. 84, p. 145, 1920. 



This is a moderately large genus of species that vary widely from one 

 another. They all have in common the orbital setulae either absent 

 or reclinate (fig. 131), the costa ending at R4+5, crossvein m-m absent 

 or, when present, distad of crossvein r-m (fig. 134). In fact, the 



