NO. 2018. 8YN0P8I8 OF OENERA OF AOROMYZIDM—MALLOCH. 143 



TABLE OF SPECIES. 



1. Larger species 1^-2 mm.; fore femora with a long, curved bristle at about apical 



third on the postero-ventral surface (pi. 6, fig. 27) vagans Fallen. 



Smaller species barely 1 mm.; fore femora without a clearl)^ differentiated 

 bristle as above, the row on this surface graduated in length (pi. 6, fig. 

 26) lacteipennis Fallen. 



MEONEURA VAGANS Fallen. 



Plate 5, figs. 10, 11; plate 6, fig. 27. 



Agromyza vagans Fallen, Dipt. Suec. Agromyza, 1823, 5.7 

 ? Agromyza obscurella Fallen, Dipt. Suec, Agromyza, 1823, 5.7. 

 ? Agromyza pectinata Meigen, Syst. Beschr., vol. 6, 1830, p. 179, species 4.1. 

 ? Agromyza infuscata Meigen, Syst. Beschr., vol. 6, 1830, p. 184, 56. 

 Agromyza tritid Fitch, 2nd Kept. Nox. Ins. N. Y. State, 1856, p. 303. 

 Meoneura obscurella (Fallen) Rondani, Frodr., vol. 1, 1856, p. 128, pis. 4, 5, 6, 

 figs. 3, 10, 11, 27. 



Male and Female. — Black, distinctly shining. Frontal triangle 

 glossy, the anterior margin of frons distinctly reddish-yellow; some- 

 times this color is confined to anterior margin, at others the anterior 

 half of frons is reddish, and more rarely the pale color extends almost 

 to vertex, but the ocellar triangle is always black. Face bro'wiiish- 

 yellow, excavated, with a slight central keel and the mouth margin 

 slightly produced, antennae brown, cheeks brown, paler anteriorly; 

 besides the two anterior vibrissas there are four to five bristles formmg 

 the diagonal row across the cheek; above this series of bristles the 

 cheek is subopaque, below it glossy and slightly granulose; proboscis 

 and palpi brown, normal m size. Mesonotum slightly gray dusted; 

 three pairs of dorso-central bristles present, the anterior pairs reduced 

 in size; surface with numerous short setulose hairs. Abdomen sub- 

 shining; segments brownish toward bases; all segments with scat- 

 tered surface hairs, the most distinct being the preapical row on 

 each segment; female ovipositor not chitinized, papillalike; male 

 hypopygium of moderate size, glossy brown. Legs brown, the tarsi 

 paler; all legs with short, pale brown hairs; besides the long bristle 

 on anterior femur there is one present on the apical third of the 

 antero-ventral surface of the hind femur; tarsi rather thickly covered 

 with pale, almost white, hairs on the ventral surface. Wings gen- 

 erally whitish, veins yellow or pale brown, costa interrupted at before 

 tip of first vein, to this part furnished with a double row of setulse, 

 which are longer than the diameter of the costal vein; length from 

 humeral vein to end of first about one-third as long as next costal 

 division; inner cross vein at just beyond end of first vein, outer 

 cross vein at about one and one-half times its own length from inner; 

 fourth vein indistinct from outer cross vein. Halteres milk white. 



Length. — 1.5-2 mm. 



I have no hesitation in placing tritici Fitch as a synonym of the 

 specimens in collection, from Europe, standing as obscurella Fallen. 



