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Key: European Ulidia Meigen 1826
A key to European (and some Near East) species of Ulidia Meigen 1826.

References
Kameneva, E.P., 2008. New and Little-Known Ulidiidae (Diptera, Tephritoidea) from Europe. - Vestnik Zoologii 42(5): e-45-e71.
Taken from this publication with the author's () permision.
Last modified 20/01/2010 23:28 by Valery KorneyevNo of couplets: 11

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Key
1a
Wing with brown apical spot .
2
b
Wing entirely hyaline to brown, but without apical spot.
4
 
2a
Eye at least 1.4 times (usually 1.5-1.55) as high as long. Frons wider than long or at most as long as wide, deeply pitted. Larger flies, wing length 4.5-6.5 mm.
3
b
Eye round, less than 1.3 (1.2-1.25) as high as long . Frons longer than wide, inconspicuously dotted. Smaller flies, wing length less than 4.5 (usually 2.5-3.5) mm.
U. salonikiensis Hennig
 
 
3a
Halter yellow.
U. apicalis Meigen
 
b
Halter black.
U. megacephala Loew
 
 
4a
Side of frons with triangular white microtrichose area. At least wing base (cell bc) brown.
5
b
Frons sides shining, at most eye narrowly bordered with whitish microtrichose areas. Wing variable.
6
 
5a
Mesonotum densely shagreened, almost matt . Wing at anterior margin (including cell c) widely brown . Frons in profile straight or slightly convex, orbital plate and gena moderately or short setose (longest setae shorter than antenna); parafacialium and face black.
U. atrata Loew
 
b
Mesonotum shining black or finely shagreened. Wing hyaline, except cell bc, base of cell c and stigma usually brown . Frons in profile usually concave, orbital plate and gena long setose (longest setae longer than antenna); parafacialium and face reddish yellow.
U. ruficeps Becker
 
 
6a
Tarsi entirely black. Face, gena and most of frons dark brown to black. Eye less than 1.3 (1.1-1.2) times as high as long.
U. omani Steyskal
 
b
Mid- and hindtarsi at least partly yellowish to reddish. Other characters variable.
7
 
7a
Anterior part of head (frons above lunule, sometimes face and parafacialium) reddish; eye round (less than 1.3 times as high as long).
8
b
Anterior part of head mainly black; eye oval (more than 1.3 times as high as long).
9
 
8a
Frons satin subshining and smooth in the middle, dotted laterally ; pterostigma and veins brownish; mesonotum densely shagreened, almost matt. Male hindfemur unmodified, as wide as midfemur.
U. facialis Hendel
 
b
Frons shining and pitted over whole anterior half ; pterostigma and veins hyaline, if veins darkened, then wing uniformly brownish and mesonotum shining. Male hindfemur swollen in distal part .
U. wadicola Steyskal
 
 
9a
Wing brownish grey except basal one-quarter (fig.). Apical portion of distiphallus ("glans") with a few blunt sclerotized projections, but without claw-like or rasper-like structures (fig. ).
U. nigripennis Loew
 
b
Wing uniformly yellowish or hyaline (figs ). Apical portion of distiphallus ("glans") either with sharply pointed, claw-like projections or rasper-like structures (fig. )
10
 
10a
Abdominal tergites subshining, shagreened.
U. semiopaca Loew
 
b
Abdominal tergites smooth, shining.
11
 
11a
Wing with yellowish tinge (figs ). Apical portion of distiphallus with blunt sclerotized projections and rasper-like structures (fig. ).
U. erythrophthalma Meigen
 
b
Wing hyaline, without yellowish tinge (figs ). Apical portion of distiphallus with sharply pointed, claw-like projections and less distinguishable rasper-like structures (fig. ).
U. albidipennis Loew
 
 
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