376 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



Phytobia {Phytobia) picta (Coquillett) 



Agromyza picta Coquillett, Journ. New York Ent. Soc, vol. 10, p. 188, 1902. 

 Agromyza dorsocentralis Frost, Ann. Ent. Soc. Amer., vol. 29, p. 307, 1936. 



P. picta is a striking and unique species in that the scutellum and 

 margin of the mesonotum are yellow (fig. 61). The head is somewhat 

 unusual in not having the genovertical plates extending beyond the 

 eye margin (fig. 62). No larval host plants are known. Specimens 

 have been studied from Mexico, Honduras, Costa Rica, and the 

 Panama Canal Zone. The New Mexico specimen referred to by 

 Malloch (1913) could not be found. 



Phytobia {Phytobia") pruinosa (CoqiiiHett) 



Agromyza pruinosa Coquillett, Journ. New York Ent. Soc, vol. 10, p. 189, 1902 — 

 Greene, Journ. Agr. Res., vol. 1, p. 471, 1914 (figures of adult, puparium, 

 larva, and cambium mines). 



This species is similar to P. amelanchieris in the shape of the head 

 and in having one upper-orbital seta reclinate and three lower-orbitals 

 (fig. 63). However, the maxillary palpus is yellow and the femora are 

 brown in P. pruinosa. The larvae mine the cambium of Beiula nigra L. 

 The species is known from Colorado, Illinois, District of Columbia, 

 and New York. 



Phytobia {Phytobia) pruni (Grossenbacher) 



? Agromyza nigripes (Meigen), Melander, Journ. New York Ent. Soc, vol. 21, 

 p. 254, 1913. 



Agromyza pruni Grossenbacher, Bull. Torrey Bot. Club, vol. 32, p. 235, 1915 

 (figure of wing). — Malloch, Bull. lUinois Nat. Hist. Surv., vol. 11, p. 349, 

 1915 (figures of ovipositor, larval and puparial characters). 



Melander has in his collection a female from Colorado that does not 

 entirely conform to Malloch's redescription. Because none of Grossen- 

 bacher's specimens could be located, a positive identification is im- 

 possible. The species is similar to Phytobia indecora in having the costa 

 terminate at vein R4+5, but P. pruni has the ultimate section of M34.4 

 only about 1.5 times as long as the penultimate. Grossenbacher's 

 specimens were reared from the cambium of Prunus avium and 

 Prunus domestica in New York. 



Phytobia {Phytobia) setosa (Lroew) 



Agromyza setosa Loew, Berliner Ent. Zeitschr., vol. 13, p. 45, 1869 (Centuria 



VIII, No. 83). 

 Agromyza aceris Greene, Journ. Agr. Res., vol. 10, p. 313, 1917 (figures of larva 



and puparium). 



Most closely related to P. amelanchieris, this species has the eye 

 higher than wide (fig. 64), lunule flattened above (fig. 65), usually 

 two lower-orbital setae, and the femora distally brownish. The larvae 



