AGROMTZID LEAF MINERS — FRICK 399 



4. Mesonotum with inner postalar seta about one-third as long as outer jiostalar 



(fig. 120); one or two lower-orbital setae rcverberata 



Mesonotum with inner postalar subequal to outer; three lower-orbitals (fig. 

 126) variata 



5. Wing with costal area light brown from Ri to Rj+j (fig. 108) ; scutellum without 



basal lateral black triangles (fig. 109) futnicosta 



Wing with costal area colorless; scutellum with large black triangles, basal 

 scutellar seta on black pacifica 



6. Mesonotum with three or four dorsocentral setae, the third strongly anterior 



to the supraalar seta, third and fourth at least two times as far apart as 



the second and third (figs. Ill, 124) 7 



Mesonotum with four dorsocentrals, the third opposite or only slightly anterior 

 to the supraalar, third and fourth about 1.5 times as far apart as the second 

 and third (figs. 101, 113) 9 



7. Mesonotum with dark area of two colors, either light reddish centrally with 



dark brown lateral stripes (fig. Ill), or dark brown centrally and light 



reddish laterally 8 



Mesonotum with dark area uniformly dark brown or black (fig. 124) . sorosis 



8. Mesonotum with three dorsocentrals, central area reddish brown, lateral 



stripes dark brown (fig. Ill) marginalis 



Mesonotum with four dorsocentrals, central area black, lateral stripes light 

 reddish barrocoloradensis 



9. Third antennal segment rounded 10 



Third antennal segment angulate dorsoanteriorly (fig. 96) . . angulicornis 



10 Scutellum without basal lateral dark triangles 11 



Scutellum with basal lateral dark triangles (fig. 101) 12 



11. Mesonotum dark brown; acrostichal setae in four rows, a small intraalar 



present, about twice as long as an acrostichal melampyga 



Mesonotum light reddish brown; acrostichals in two rows; intraalar absent. 



lutea 



12. Anepisternum with a dark oval or triangular area (fig. 100) 13 



Anepisternum entirely yellow schmidti 



13. Humerus with a dark area; width of gena posteriorly not more than one-half 



the eye height (fig. 98) 14 



Humerus entirely yellow; gena very wide, posteriorly subequal to the eye 

 height borealis 



14. Maxillary palpus yellow 15 



Maxillary palpus brown tubifer 



15. Acrostichal setae about 13 in number, in four rows; prescutellar yellow area 



subrectangular flavonigra 



Acrostichals five or six in number, in two rows; yellow area triangular (fig. 

 99) assimilis 



16. Third antennal segment totally dark brown or black, or if mostly yellow then 



darkened distally (fig. 126) 17 



Third antennal segment entirely light yellow 21 



17. Wing with m-m crossvein present, or if absent, then mesiperon at least one- 



half yellow 18 



Wing with m-m crossvein absent; mesepimeron black .... chlamydata 



18. Third antennal segment yellowish, infuscated distally 19 



Third antennal segment entirely black 20 



19. Mesepimeron at least one-half yellow; pteropleuron about one-half yellow. 



langei 

 Mesepimeron black; pteropleuron black or very dark grayish black . dianthj 



