AGROMYZID LEAF MINER3 — FRICK 421 



The only closely related species that could be placed into a species 

 group are those that are very similar to P. ilicicola (couplet 36). The 

 larvae of these foui" species mine the leaves of woody shrubs and trees 

 such as Symphoricarpos spp. (P. periclymeni) , Lonicera spp. (P. 

 gregaria), Prunus spp. (P. persicae), and Ilex spp. (P. ilicicola). 



The following species names are not included in the present species 

 list because I have found no specimens that agree with European 

 specimens. These species are: P. affinis Fallen, P. analis Zetterstedt, 

 P. hieracii Hendel, P. nigritella Zetterstedt, and P. obscurella Fallen. 



Key to the described species of Phytomyza 



1. Frons yellow, light orange, or reddish yellow 2 



Frons all or mostly brown or black, sometimes yellowish dorsally .... 29 



2. Scutellum all or partially yellow 3 



Scutellum gray or black 6 



.3. Third antennal segment black or dark brown 4 



Third antennal segment j^ellow . major 



4. Head with dorsal upper-orbital seta shorter than the ventral upper orbital, 



or absent (fig. 147) 5 



Head with both upper-orbitals of equal length and strength (fig. 168).trivittata 



5. Vein R2+3 undulating, M1+2 straight or distally only slightly curved posteriorly ; 



one lower-orbital ranunculi 



Vein R2+3 straight, M1+2 undulating medially (fig. 148); two lower-orbitals 

 (fig. 147) clenaativora 



6. Femora entirely or mostly yellow, at most with brown streaks or spots . . 7 

 Femora black or gray, sometimes distally yellow for a distance subequal to 



the femoral diameter 10 



7. Antenna yellow, third segment sometimes darkened distally 8 



Antenna with third segment black, first and second yellow .... nervosa 



8. Mesonotum heavily dull gray pollinose ,* head with two upper-orbital setae . 9 

 Mesonotum shining black; only one upper-orbital flavicornis 



9. Anepisternum three-fourths dull gray, dorsal one-fourth and a very narrow 



posterior margin yellow rufipes 



Anepisternum yellow, except for a ventral light brown triangle of about one-half 

 the height and width of the anepisternum genalis 



10. Third antennal segment yellow, sometimes darkened distally (fig. 152). . 11 

 Third antennal segment black 12 



11. Third antennal segment setulose (fig. 144); intraalar row with two 



or three setulae anterior to and two or three posterior to the transverse 



suture auricornis 



Third antennal segment bare (fig. 152); intraalar row with about four or 



five anterior to and about six posterior to the transverse suture, flavincrvis 

 Mesonotum laterally yellow, including humerus and notopleural triangle . .1.3 



Mesonotum laterally brown or black 16 



Head with both upper-orbital setae of equal length and strength (fig. 164). . 14 

 Head with dorsal upper-orbital seta shorter than the ventral, or absent . . .15 

 Tarsi brown; mesonotum dull gray pollinose; gena medially about two-fifths 



as high as the eye height (fig. 149) delphinii 



Tarsi yellow; mesonotum subshining brown; gena medially about^one-eighth 



the eye height (fig. 164) plumiseta 



