eye; 2 ors, 4 strong ori, orbital setulae long, 
reclinate; gena broad, 0.25 height of eye, para- 
facial forming broad ring below eye; 3d dc strong, 
nearer 2d than suture; squama gray, margin and 
fringe black; male genitalia as in figures 
15, 16. 
Host/Early Stages. Unknown. 
Distribution. Idaho; Canada. 
References. Melander, 1913: 260; Frick, 1957b: 
200; 1959: 366; Spencer, 1969a: 75. 
9 (8). Large species, wing length 2. 7-3.1 mm 
M. scrophulariae Spencer 
Synopsis. Frons broad, greatly projecting above 
eye; 2 ors, 4 ori; parafacial broad, up to 0.5 
height of eye, facial keel raised, dividing bases 
of antennae; mesonotum and abdomen greenish; 
squama gray, margin blackish; male genitalia with 
aedeagus as in figures 17, 18. 
Host/Early Stages. Scrophularia . Larva internal 
stem borer but characters unknown. 
Distribution. California. 
Reference. Spencer, 1981: 57. 
— Smaller species, wing length 2. 1-2. 3 mm 
M. sagehenensis Spencer 
Synopsis. Closely resembling M. scrophulariae , 
also with raised facial keel, but distinctly 
smaller; male genitalia with aedeagus as in 
figures 19, 20. 
Host/Early Stages. Potentilla glandulosa . Larva 
internal stem borer; puparium yellowish, posteri- 
or spiracles widely separated, each process with 
ellipse of some 20 bulbs and round, long, outward- 
ly curving horn. 
Distribution. California, Montana (new record). 
References. Spencer, 1981: 56; part 2, p. 247. 
10 (5). Squama and fringe pale, whitish 11 
— Squama and fringe darker, gray, or blackish 46 
11 (10). Proboscis conspicuously long and slender (fig. 21)- 
M. proboscidata Spencer, n. sp. 
Synopsis. Wing length 2.3 mm; mesonotum shining 
black, abdomen blackish green or coppery; male 
genitalia with aedeagus as in figures 22, 23. 
Host /Early Stages. Unknown. 
Distribution. Texas. 
Reference. Part 2, p. 246. 
Proboscis short, normal 12 
12 (10). Ocellar triangle brilliantly shining 13 
— Ocellar triangle at most moderately shining 15 
13 (12). Gena deep, 0.25 height of eye; orbit distinctly 
shining M. viridis (Frost) 
Synopsis. Small to medium-sized species, wing 
length 2-2.5 mm; 2 ors, 2 ori, orbital setulae in 
single row, reclinate; lunule higher than a semi- 
circle; ocellar triangle long, narrow, extending 
to level of upper ori; male genitalia with 
aedeagus as in figures 24, 25. 
20 
