Distribution. California, Washington; widespread 
in Europe. 
References. Frick, 1959: 356 (as A. niveipennis ) ; 
Spencer, 1973a: 240 (economic importance); 1981: 
107. 
13 (11). 1 ors-- A. tularensis Spencer 
Synopsis. Frons conspicuously projecting above 
eye, 1 ors, 2 ori; parafacial shining black; 3d 
antennal segment finely pointed (fig. 370); meso- 
notum brilliantly shining black, 3 strong dc; all 
veins dark, last and penultimate sections of M 3+4 
equal; squama and fringe silvery; male genitalia 
with aedeagus (figs. 371, 372) having distinctive 
curvature . 
Host/Early Stages. Unconfirmed but larva certainly 
feeding on Poaceae. 
Distribution. California. 
Reference. Spencer, 1981: 130. 
2 ors ^4 
14 (13). Male genitalia with aedeagus having long, slender 
tubules and distinctive curvature (figs. 373, 
374)-- A. albertensis Spencer 
Synopsis. Frons slightly projecting above eye; 2 
ors, 2 ori; gena extended at rear, 0.40 height of 
eye; 3d antennal segment distinctly angulate 
(fig. 375); mesonotum brilliantly shining black; 
wing with veins brown, length 2. 3-2.8 mm; squama 
and fringe white. 
. Host/Early Stages. Unconfirmed but certainly 
Poaceae . 
Distribution. Colorado (new record); Canada. 
References. Spencer, 1969a: 32; part 2, p. 262. 
Male genitalia with aedeagus having distal tubules 
broader, less curving (see couplet 12) 
“ A. (?) ambigua Fallen 
Synopsis. Larger species, wing length 2.5-3 mm; 
resembling A. ambigua but wing and veins not pale. 
Host/Early Stages. Unconfirmed but certainly 
Poaceae . 
Distribution. California. 
Remarks. With no reared material available, it is 
uncertain whether this represents a distinct 
species or possibly merely a darker form of A. 
ambigua . ~ 
15 (10). Exceptionally large species, wing length from 3.25 
mm in male to 4.1 mm in female A. kincaidi Malloch 
Synopsis. Frons black, slightly projecting above 
eye in front; normally 5 orbital bristles, more 
rarely 4 or 6; arista distinctly pubescent; gena 
deep at rear, 0.33 height of eye; all antennal 
segments black; mesonotum distinctly matt viewed 
from front, more shining black from rear; legs 
normally entirely black, foreknee sometimes paler; 
squama white, fringe variable, whitish, sometimes 
at least partially ochreous or brownish; wing 
veins dark; male genitalia with aedeagus as in 
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