400 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



20. Crossvein m-m about one-fourth of its length fromr-m; distally femora brown. 



qiiadrisetosa 



Crossvein m-m about twice its length from r-m; femora brown; distally yellow 



for a distance subequal to the femoral diameter baptisiae 



21. Anepisternum brown except for a narrow yellow dorsal band subequal in 



width to a suture 22 



Anepisternum not more than three-fourths brown (fig. 116), dark area 

 usually triangular 23 



22. Genovertical plates yellow; inner vertical seta arising from yellow (fig. 106). 



discalis 



Genovertical plates dark from vertex nearly to lunule; both vertical setae 



arising from black of occiput (fig. 104) deceptiva 



23. Femora primarily yellow, usually marked with brown or black streaks or 



spots 24 



Femora dark brown, distal one-third yellow flaveola 



24. Calypter witb margin and fringe blackish 25 



Calypter with margin and fringe white lima 



25. Head with both vertical setae arising from black of occiput, inner usually at 



edge of dark color 26 



Head with both vertical setae on yellow 31 



26. Genovertical plates darkened between orbital setae and eye margin ... 27 

 Genovertical plates yellow, concolorous with frontal vitta 29 



27. Anepisternum at least one-half brown or black, dark area subrectangular . 28 

 Anepisternum less than one-half brown or black, dark area triangular. 



brassicae 



28. Anepisternum about three-fourths dark (fig. 116); first dorsocentral seta 



small, subequal to an acrostichal in length and about one-fourth the fourth 



dorsocentral in length propepusilla 



Anepisternum about one-half dark; first dorsocentral larger, about one-third 

 the length of the fourth dorsocentral pictella 



29. Crossvein m-m not more than its length from r-m; ultimate section Ma-i-* 



about three times as long as penultimate 30 



Crossvein m-m 1.5 to two times its length from r-m; ultimate section M3+4 

 about two times as long as the penultimate eupatorii 



30. Inner postalar seta about one-half as long as the outer postalar; seven to nine 



setulae in the intraalar row posterior to the transverse suture . . munda 

 Inner postalar seta about one-fourth to one-third as long as the outer; about 

 five setulae in the intraalar row posterior to the transverse suture. 



verbenicola 



31. Mesonotum with four irregular rows of acrostichal setae 32 



Mesonotum with two irregular rows of acrostichal setae 34 



32. Humerus without a dark spot 33 



Humerus ^vith a dark spot alliovora 



33. Head with black of the occiput reaching to eye margin (fig. 107) ; anepister- 



num with a small dark ventral area felti 



Head with black of the occiput not reaching to eye margin (fig. 102) ; ane- 

 pisternum entirely yellow commelinae 



34. Head with black of the occiput not reaching to eye margin; inner postalar 



seta on yellow 35 



Head with black of the occiput reaching the eye margin; inner postalar seta 

 on black trifolii 



