AGROMYZID LEAF MINERS — FRICK 381 



Phytohia angulata is close to P. subangulata because both have the 

 prescutellar seta present. However, the former has the eye smoothly 

 rounded anteriorly (fig. 69) as compared to the irregular curvature 

 shown by P. subangulata (fig. 79). The lunule is not abruptly nar- 

 rowed immediately above the antenna as it is in P. subangulata (fig. 

 78). All femora are narrowly yellow distally. The wing has cross- 

 vein r-m at about the center of cell I-M2 and m-m is about 1.5 times 

 its length from r-m. There are no North American specimens known 

 to me that have been reared, but the larvae mine species of Carex in 

 Europe. There are specimens from widely scattered States and it is 

 probable that the species is present in every State of the United States. 

 It is known from Ontario and Quebec in Canada. 



Phytohia (Poemyza) incisa (Meigen) 



Agromyza incisa Meigen, Systematische Beschreibung der bekannten europSischen 



zweifliigeligen Insekten, vol. 6, p. 182, 1830. 

 Dizygomyza (Poemyza) incisa (Meigen), Hendel, Die Fliegen der palaearktischen 



Region, fam. 59, p. 38, 1931 (figures of head, wing, and puparial characters). 



This species is rather distinctive in having crossvein m-m approxi- 

 mately beneath the junction of Ri in the costa. The prescutellar 

 seta is not developed and the species is subshining black with only 

 the forefemur yellow distally. Phytobia inconspicua is similar but 

 has all femora distally yellow. The larvae form blotch mines in the 

 leaves of many species of grass. There may be several larvae per 

 mine. Frick (1952) listed four host plants; other North American 

 grasses from which adults have been reared are Phleum pratense L., 

 Triticum, aestivum L., Setaria lutescens (Weigel) Hubb., and Phalaris 

 arundinacea L. There are specimens from many States in the north- 

 ern half of the United States and from Ontario in Canada. 



Phytobia {Poemyza) inconspiciia (Malloch) 



Agromyza inconspicua Malloch, Ann. Ent. Soc. Amer., vol. 6, p. 310, 1913. 



This species is very similar to Phytobia incisa but is smaller (1.75 

 mm. in wing length), has the third antennal segment slightly angu- 

 late, and has all femora distally yellow. The head of the type (fig. 

 70) is somewhat distorted because the specimen is teneral. This 

 species is known from a single male reared from a mine on Agropyron 

 sp. in Colorado, The puparium is on the same pin and illustrations 

 of the posterior end and spiracles are included (figs. 71, 72, and 73). 

 The spiracles are different from any others that I have seen. 



Phytobia {Poemyza) lateralis (Macquart) 



Agromyza lateralis Macquart, Histoire naturelle des Insectes, Diptera, vol. 2, p. 



609, 1835. 

 Dizygomyza (Poemyza) lateralis (Macquart), Hendel, in Lindner, Die Fliegen 



der palaearktischen Region, fam. 59, p. 40, 1931 (figures of head and wing). 



