364 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Melanagromyza dianthereae (Malloch) 



Limnoagroimjza dianthereae Malloch, Bull. Brooklyn Ent. Soc, vol. 15, p. 147, 



1920. 

 Melanagromyza dianthereae (Malloch), Frick, Univ. California Publ. Ent., vol. 8, 



p. 378, 1952. 



This is an extraordinarily large species with wing lengths of 3 to 

 3.75 mm. There is a sexual difference in the third antennal segment, 

 that of the male being more heavily setulose (fig. 27) than that of 

 the female (fig. 28). The orbital setiilae are inclined (fig. 29) as they 

 are in M. burgessi (fig. 24). The larvae mine the stems of Justicia 

 {—Dianthera) americana (L.) Vahl. Known only from Illinois 

 and Indiana. 



Melangromyza gibsoni (Malloch) 



Agrornyza gibsoni Malloch, Proc. XJ. S. Nat. Mus., vol. 49, p. 106, 1915 (figure of 

 head, wing, and puparial characters) . 



The mesonotum and abdomen have a greenish sheen and crossvein 

 m-m is not more than its length from r-m, and usually closer. The 

 head has the genovertical plates slightly extending beyond the eye 

 margin and the four orbital setae are about equidistant from one 

 another (fig. 30). The larvae mine the stems of Medicago saliva L. in 

 the western United States. I have identified specimens from Cali- 

 fornia, Arizona, western Texas, and Colorado. 



Melanagromyza longiseta (Malloch) 



Agrornyza longiseta Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 326, 1913 (figure of 

 head).— Shewell, Canadian Ent., vol. 85, p. 468, 1953. 



This species belongs to Melanagromyza sens. str. because of the 

 single vibrissa and the approximate antennal bases, even though the 

 head (fig. 31) has a distinctive profile. There is only one known 

 specimen, the holotype female from Frontero, Tabasco, Mexico. 



Melanagromyza mallochi (Hendel) 



Agrornyza eupatoriae Malloch (not Kaltenbach, 1874), Proc. U. S. Nat. Mus., vol. 



49, p. 107, 1915. 

 Agrornyza mallochi Hendel, Konowia, vol. 2, p. 145, 1923. 



M. mallochi belongs to the group with white calypteral fringe and 

 no metallic sheen. The head is relatively high and narrow and bears 

 only two lower-orbital setae (fig. 32). The larvae mine in Eupatorium 

 odoratum L. in Puerto Rico. 



Melenagromyza minima (Malloch) 



Agromyza minima Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 328, 1913. 

 Agromyza longicauda Curran (part), Scientific survey of Porto Rico and the 



Virgin Islands, vol. 11, pt. 1, p. 65, 1928 (allotype 9, Virgin Islands). 

 Agromyza longiseta (Malloch), Frost, Ann. Ent. Soc. Amer., vol. 29, p. 318, 1936. 



