AGROMYZID LEAF MINERS — FRICK 363 



rounded subcranial margin (fig. 23). The holotype is from Guatemala 

 and the paratype is from the Panama Canal Zone. 



Melanagromyza burgessi (Malloch) 



Agromyza burgessi Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 323, 1913 (figure of 



head). 

 Melanagromyza burgessi (Malloch), Frick, Canadian Ent., vol. 85, p. 69, 1953. 



This is a large species with a wing length of 3 mm. The orbital 

 setulae are erect to reclinate except for a few anterior ones that are 

 proclinate (figs. 24 and 25). The only other species with such an 

 arrangement is M. dianthereae. The latter has the margin and fringe 

 of the calypter white. No larval host plants are kno^vn. The species 

 has a wide range and there are specimens from Colorado, Kansas, 

 North Dakota, Michigan, Illinois, Indiana, New York, and 

 Massachusetts. 



Melanagromyza caerulea (Malloch) 



Agromyza caerulea Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 322, 1913 (figure of 



wing). — Bailey and Plank, Journ. Econ. Ent., vol. 33, p. 704, 1940. 

 Agromyza plurniseta Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 324, 1913. 



This is the only North American species known to me that has a 

 green sheen to the mesonotum and abdomen and a strong seta medially 

 on the foretibia. M. orbitalis has a foretibial seta but lacks the gi-een 

 sheen and has the calypteral fringe black. The head of M. caerulea is 

 relatively high and narrow (fig. 26). The larvae feed in the seeds of 

 several species of Ipomoea, including /. batatas Poir. The species is 

 known from the Gulf coast of Texas and from Mexico, Puerto Rico, 

 and Jamaica. 



Melanagromyza crotonis (Frost) 



Agromyza crotonis Frost, Ann. Ent. Soc. Amer., vol. 29, p. 313, 1936. 



The holotype male is in the U. S. National Museum (No. 62975). 

 There are only three specimens (two headless) of this species, all from 

 Barro Colorado Island, Panama Canal Zone. The larvae mine the 

 leaves of Croton billbergianus Muell. This is a small species (1.3 mm. 

 in wing length) and there is no medial seta on the mid tibia. The 16 

 specimens reared from leaf mines on Clitoria sp. are of a difierent 

 species. 



Melanagromyza diadema (Melander) 



Agromyza diadema Melander, Journ. New York Ent. Soc, vol. 21, p. 259, 1913. 



This unique species is known from a single female from Haiti in the 

 A. L. Melander collection. The lunula and lower half of the frontal 

 vitta are reddish in contrast to the black or brown in all other species 

 of Melanagromyza. 



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