412 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io8 



included here are mostly black or dark brown and usually have some 

 yellow markmgs. There are a few Liriomyza species that are as dark 

 colored. 



Metopomyza interfrontalis (Melander) 



Agromyza interfrontalis Melander, Journ. New York Ent. Soc, vol. 21, p. 263, 

 1913. 



Thus far the only species of Metopomyza known in North America, it 

 may be distinguished from Liriomyza species by the broad, prominent 

 genovertical plates (fig. 128). This is a shining black species that has 

 the frontal vitta dark j^ellow, scutellum medially yellow, calypter with 

 margin and fringe yellow, som.e abdominal tergites posteriorly yellow, 

 and all femora distally yellow for a distance subequal to the femoral 

 diameter. No larval host plants are known. I have seen specimens 

 from the northern half of California. Washington, Texas, Kansas, 

 Illinois, Michigan, and Virginia. There are many specimens in the 

 Canadian National Collection. 



9. Genus Haplomyza Hendel 



Antineura Melander (not Osten Sacken, 1881), Journ. New York Ent. Soc, 



vol. 21, p. 219, 1913. 

 Haplomyza Hendel, Ent. Mitt., vol. 3, p. 73, 1914. 



The characters used in the key to separate Haplomyza from Lirio- 

 myza appear superficial. However, with the combination of four 

 characters — (1) mesonotum dull, heavily gray pollinose, (2) two sparse 

 rows of acrostichals, (3) crossvein m-m absent, and (4) only one 

 upper-orbital (fig. 129) — go wide and clearcut differences in the male 

 terminalia and posterior spiracles of the larvae. Certain species of 

 Liriomyza in Europe have as many as three of the characters occurring 

 together. Among North American Liriomyza not more than any two 

 occur together. On the basis of this restricted concept of characters 

 for Haplomyza species, Antineura chlamydata Melander belongs in 

 Liriomyza because the mesonotum is shining and there are four rows 

 of acrostichals and two upper-orbitals. 



Haplomyza is a small genus with three North American species. 

 Of the Palaearctic species described by Hendel (1931) only one, Lirio- 

 myza dejiciens (Hendel), appears to belong here. Haplomyza lopesi 

 Oliveira and Silva (1954) from Brazil seems to be properly placed. 



Key to the described species of Haplomyza 



1. Inner postalar seta arising from black; scutellum with basal scutollar seta 



arising from large lateral black triangle 2 



Inner postalar seta arising from yellow; scutellum broadly yellow, basal scu- 

 tellar arising from yellow palliata 



