362 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io8 



24. Crossvein m-m about two-thirds of its length from r-m; gena buccate (fig. 41). 



tiliae 



Crossvein m-m about its own length from r-m; gena not buccate, sloping 



posteroventrally from eye margin schineri 



MeUznagromyza aldrichi Frick 



Agromyza tibialis Frost (not Fallen, 1823), Ann. Ent. Soc. Amer., vol. 29, p. 312, 



1936. 

 Melanagromyza aldrichi Frick, Univ. California Publ. Ent., vol. 8, p. 377, 1952. 



The holotype male is in the U. S. National Museum (No. 62970). 

 This large species has the eye nearly as large as the head (fig. 21), 

 both a bronzy and greenish sheen to the mesonotum and abdomen, 

 and a wing length of 2.5 to 3 mm. The setulae on the arista vary in 

 length from one to two times the basal diameter of the arista. Larval 

 host plants are unknown. I have studied 14 specimens in S. W. 

 Frost's collection from Panama, Panama Canal Zone, and Guate- 

 mala. The species appears to be common in Central America. 



Melanagromyza angelicae (Frost) 



Agromyza lappae (Loew), Hendel (part), in Lindner, Die Fliegen der palaearkti- 

 schen Region, fam. 59, p. 167, 1931 (figures of head and wing). 



Agromyza pseudocunctans (Strobl), Melander (part), Journ. New York Ent. Soc, 

 vol. 21, p. 251, 1913 (1 cf, Pullman, Wash.; 1 ? , Almota, Wash.). 



Agromyza angelicae Frost, Ent. News, vol. 45, p. 40, 1934. 



European workers — K. A. Spencer in England and E. M. Hering 

 in Berlin — have separated the Angelica-mimng species from the true 

 M. lappae, the larvae of which are found only on Arctium lappa L. 

 I compared specimens from these two workers with the holotype of 

 M. angelicae and foimd them to be the same. M. angelicae is most 

 closely related to M. tamia in having the orbital setulae proclinate, 

 except for a few that are erect adjacent to the eye margin (fig. 22) 

 but lacking a green sheen to the mesonotum. The larvae of M. 

 angelicae mine the stems of Angelica atropurpurea L. in New York 

 and A. silvestris L. in England and Germany. Melander's specimens 

 must belong to this species and not to M. lappae because Piper and 

 Beattie (1914) list two species of Angelica, lyalii Wats, and canbyi 

 C. & R., from eastern Washington and do not mention Arctium 

 lappa L. 



Melanagromyza approximata (Frost) 



Agromyza approximata Frost, Ann. Ent. Soc. Amer., vol. 29, p. 316, 1936. 



The holotype male is in the U. S. National Museum (No. 62969). 

 There is a paratypc female in the collection of S. W. Frost that seems 

 to be of the same species. Closely related to M. aldrichi, this species 

 is smaller (2.3 mm. in wing length) and has a deeper gena and a 



