artemisiae , possibly slightly larger; wing length 
from 1.5 mm in male to 1.8 mm in female. 
Host/Early Stages. Unknown. 
Distribution. Southern California. 
Reference. Spencer, 1981: 255. 
30 (23). Femora variably marked with blackish striations 31 
— Femora entirely yellow or at most narrowly black 
basally 39 
31 (30). Both vt on black ground 32 
vti on yellow 36 
32 (31). Orbit distinctly darkened 33 
— Orbit yellow 35 
33 (32). Mesonotum brilliantly shining black 
L. trifoliearum Spencer 
Synopsis. Frons orange yellow; 3d antennal 
segment variable, normally brownish yellow, rarely 
darker, more blackish or paler, more yellowish; 
mesopleuron (fig. 703) largely black, only narrow- 
ly yellow along upper margin; legs with coxae, 
tibiae, and tarsi black, femora basically yellow, 
particularly below, but variably darkened, often 
appearing largely black; wing length 1 . 4 - 1. 9 mm in 
male, up to 2.2 mm in female, discal cell small, 
last section of M 3+4 about 2.5 times length of 
penultimate; male genitalia with aedeagus as in 
figures 704, 705, left basal sclerite character- 
istically triangular (viewed ventrally in rest 
position); sperm pump with narrow stalk and small 
blade . 
Host/Early Stages. Most commonly Medicago sativa , 
also Coronilla varia , Pisum , Trifolium incarnatum , 
and T. repens ; recorded once on Solanum sarracho- 
ides . Larva forms whitish linear mine (fig. 706), 
normally pupating externally, occasionally in 
leaf. 
Distribution. California, Florida, Massachusetts, 
New York, Pennsylvania, Washington, Wisconsin; 
Canada. 
References. Spencer and Stegmaier, 1973: 107; 
Spencer, 1981: 278; part 2, p. 296. 
— Mesonotum more matt, only moderately shining 34 
34 (33). Frons not projecting above eye; gena 0.20 height 
of eye L . lupinella Spencer 
Synopsis. Frons and gena yellow, hindmargin of eye 
black, both vt on black ground; orbit black or 
variably darkened, at least to level of lower ors; 
3d antennal segment varying from dark brown but 
more yellow on lower half to mainly dark orange 
yellow; face black, palpus yellowish; mesonotum 
appearing somewhat matt, only moderately shining; 
humerus and notopleuron yellow, pleura otherwise 
shining black; legs appearing blackish above but 
femora distinctly yellow below and with all knees 
yellow; squama gray, margin and fringe black; wing 
length 1.6-1.75 mm in male to 2.25 mm in female, 
last section of M 3+4 twice penultimate; male 
118 
