29 
Frons not significantly projecting above eye- 
26 (24). Ocellar triangle not developed beyond ocellar 
plate M. urticella Spencer 
Synopsis. Mesonotum and abdomen green, wing length 
from 2.5 mm in male to 3.1 mm in female; gena 
deepest in center below eye, 0.25-0.20 eye 
height; male genitalia with aedeagus as in 
figures 50, 51. 
Host/Early Stages. Urtica dioica . Larva 
feeding internally in stem but unknown. 
Distribution. California. 
Reference. Spencer, 1981: 62. 
Ocellar triangle well defined, apex extending to 
level of lower ors or upper ori 27 
27 (26). Orbital setulae sparse, reclinate; 3 ori 
M. cirsiophila Spencer 
Synopsis. Wing length 2.5-3.25 mm; frons broad, 
twice width of eye; gena deepest in center, 
0.25-0.20 height of eye; arista long, virtually 
bare; male genitalia with aedeagus as in figures 
52, 53. 
Host/Early Stages. Cirsium spp. Puparium straw 
colored in front, blackish at segment boundaries 
and on segments 5 and 6; posterior spiracles 
closely adjoining, separated by less than own di- 
ameter, each with ellipse of some 12 bulbs around 
strong central horn. 
Distribution. California; new records: Colorado, 
5 miles S. of Boulder, 5,800 ft, 1 m. , 1 f . , 
16. VI. 61 (C. H. Mann, CNC) ; Nebraska, Valley Co., 
lm., ex Carduus nutans , 24. III. 77 (W. 0. Hamp, 
USNM) . 
Reference. Spencer, 1981: 41. 
Orbital setulae in several rows, inner row at least 
partially proclinate, those nearest eye margin 
reclinate; 4 ori M. angelicae (Frost) 
Synopsis. Large species, wing length 2. 5-3.0 mm; 
orbital setulae appearing largely proclinate; 
mesonotum blackish green, abdomen more shining 
green; male genitalia with aedeagus (not previous- 
ly illustrated) having conspicuously wide gap 
between basal sclerites and distiphallus complex 
(fig. 54). 
Host/Early Stages. Angelica atropurpurea , probably 
other Angelica spp. Larva feeding and pupating in 
stem; puparium whitish, posterior spiracles widely 
separated, each with ellipse of some 16-20 bulbs 
around strong central horn (fig. 55). 
Distribution. New York, Ohio (new record), many 
reared specimens (D. Witwer). 
References. Frost, 1934: 40; Frick, 1959: 362; 
part 2, p. 243. 
28 (25). 3 ori; frons 1.5 times width of eye; arista 
appearing bare M. longensis Spencer, n. sp. 
Synopsis. Wing length in male 2.6 mm; frons not 
projecting above eye, 1.5 times width of eye; gena 
24 
