Key to Japan- 1. 3+1 dc; frons reddish J. rutiliceps (Melander) 
agromyza Species Synopsis. Head (fig. 319) with frons reddish 
orange, strongly projecting above eye; 2 ors, 2 
ori; gena extended at rear, 0.25 height of eye; 3d 
antennal segment orange brown, small, round, only 
slightly longer than broad; mesonotum shining 
black, 3+1 dc; legs entirely black; squama whitish 
gray, margin pale brown, fringe pale, whitish; 
male genitalia with aedeagus (fig. 320) having paired 
distal tubules, large, forming single coil, fused 
toward base; hypandrium triangular, with extended 
apodeme; epandrium with short, stout bristles at 
lower corner; cercus without bristles; sperm pump 
with small, strongly pigmented blade and well- 
developed base (fig. 321). 
Host/Early Stages. Unknown. 
Distribution. Montana; new records: California; 
Idaho, Franklin Co., Cub River Canyon, 2 m. , 
1. VII. 61 (W. J. Hanson, USU) ; Utah, Garfield Co., 
Clear Creek Canyon, 9,300 ft, 1 f . , 4. VIII. 41 
(D. E. Hardy, UKaL) ; Panguitch Creek, 1 m. , 
2-15. VI. 67 (G. F. Knowlton, USU). 
References. Melander, 1913: 261; part 2, p. 261. 
— Only 2 postsutural dc; frons black or brown 2 
2 (1). Prescutel lar s lacking 3 
Prescutellars present 4 
3 (2). Mesonotum distinctly greenish J. perpetua Spencer 
Synopsis. Wing length 1.9-2. 4 mm; frons narrow, 
equal to width of eye; 2 equal ors, 2 similar ori; 
gena narrow, 0.10 height of eye; frons matt black, 
lunule silvery; prsc sometimes weak; mesonotum 
greenish black, abdomen more shining green; squama 
and fringe whitish yellow; halter white; male 
genitalia with aedeagus (fig. 322, A) divided 
apically, with single coil of paired tubules; 
hypandrium (fig. 322, B) without hypandrial apo- 
deme; surstylus extending downward, with few stout 
bristles internally (fig. 323); cercus large, with 
numerous bristles. 
Host/Early Stages. Unknown. 
Distribution. Florida; Bahamas, Costa Rica, 
Dominica, Puerto Rico. 
Reference. Spencer and Stegmaier, 1973: 28. 
Mesonotum primarily matt grayish black, only faint- 
ly greenish J. desmodivora Spencer 
Synopsis. Resembling J. perpetua but frons brown- 
ish black, mesonotum largely grayish black, rarely 
faintly greenish; male genitalia with aedeagus 
having single, short distal tubule (fig. 324); 
hypandrium (fig. 325) rounded at end, without apo- 
deme; surstylus short and stout, with some 12 
spines (fig. 326); cercus bearing unusually long 
hairs; sperm pump as in figure 327. 
Host/Early Stages. Desmodium tortuosum . Larva 
forming irregular blotch mine (fig. 328); puparium 
orange brown, posterior spiracles each with 3 
slightly raised bulbs (fig. 329). 
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