AGROMYZID LEAF MINERS — FRICK 367 



but differs widely in having a green sheen, three dorsocentral setae, 

 and the costa ending at vein K4+5. 



Melanagrotnyza tiliae (Couden) 



Agromyza tiliae Couden, Proc. Ent. Soc. Washington, vol. 9, p. 35, 1908 (figures 

 of adult, puparium, and twig galls). — Malloch, Bull. Illinois Nat. Hist. Surv., 

 vol. 11, p. 351, 1915 (figures of puparial characters). 



Many of the type series are teneral but one has the head in good 

 condition. The gena is buccate, rounded ventrally, and is high, being 

 about one-fourth the eye height (fig. 41). M. tiliae differs from M. 

 schineri in having the large gena and in crossvein m-m being about 

 two-thu'ds of its length from crossvein r-m. The larvae make galls 

 in twigs of Tilia americana L. The species has been positively identi- 

 fied only from Missouri and Illinois. 



Melanagromyza virens (Loew) 



Agromyza virens Loew, Berliner Ent. Zeitschr., vol. 13, p. 46, 1869 (Centuria viii, 

 No. 85). 



M. virens sens. str. is a larger species (2.5 to 3.3 mm. in wing length) 

 than the one considered by Malloch to be M. virens. Malloch had 

 specimens of M. virens sens. str. under the manuscript name of 

 Agromyza lasiops. The orbital setulae are very irregular, with the 

 posteriormost being erect (fig, 42). The eyes are setulose, particularly 

 in the males, and the mesonotum and abdomen have a greenish sheen. 

 No specimens reared from larvae are Ivnown. The species has been 

 found in Illinois, Indiana, District of Columbia, Maryland, New 

 Jersey, Pennsylvania, and Massachusetts. 



Melanagromyza viridis (Frost) 



Agromyza viridis Frost, Canadian Ent., vol. 63, p. 277, 1931. 



The holotype female is in the U. S. National Museum (No. 62964). 

 M. viridis is a moderately sized species with a relatively high, narrow 

 eye (fig. 43). The antennae are somewhat ventrally situated and the 

 lunule is very high — subequal to the height of the frontal vitta. The 

 type series was reared from Zinnia sp., and I have identified two 

 reai'ed from Encelia sp. as belonging to the same species. Both lots 

 are from the southern half of California. 



Melanagromyza tcinnemanae (Malloch) 



Agromyza winnemanae Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 314, 1913. 



This is the only species in the group with reclinate orbital setulae, 

 white calypteral fringe, and without metallic sheen that has the costa 

 terminating at vein R4+5. The head in profile shows no unusual 



