mesonotum blackish, abdomen brilliantly shining 
green; male genitalia with aedeagus as in figure 
77; hypandrium triangular (fig. 78, paralecto- 
type) . 
Host/Early Stages. Unknown. 
Distribution. Illinois; reported by Frick (1959) 
from Iowa, Pennsylvania, Virginia. 
References. Malloch, 1915a: 105; Frick, 1959: 366. 
Abdomen blackish coppery, weakly shining; normally 
4 ori- M. chillcottiana Spencer, n. sp. 
Synopsis. Closely resembling M. subvirens but 
readily distinguishable by less shining abdomen; 
male genitalia with aedeagus as in figures 79 , 80. 
Host/Early Stages. Unknown. 
Distribution. Kansas. 
Reference. Part 2, p. 244. 
36 (32). Arista appearing bare (X 38) 37 
Arista appearing distinctly pubescent 43 
37 (36). Eye bare in both sexes; minute species, wing length 
1.75-2 mm 33 
Eye distinctly pilose in male 39 
38 (37). Male genitalia with aedeagus as in figure 81 
“ M. f loris Spencer 
Synopsis. Frons equal to width of eye, not pro- 
jecting above eye; 2 ors, 2 ori, orbital setulae 
in single row, reclinate; mesonotum and abdomen 
green; ocellar triangle weakly shining; male 
genitalia with aedeagus as in figure 81; hypandri- 
um with extended apodeme (fig. 82). 
Host/Early Stages. Bidens pilosa. Calendula sp. 
Larva feeding and pupating in seed heads; puparium 
straw colored, posterior spiracles widely sepa- 
rated, each with ellipse of about 10 bulbs around 
broad central horn. 
Distribution. Florida; widespread in Caribbean 
area; Costa Rica, Mexico. 
References. Spencer, 1963a: 313; Spencer and 
Stegmaier, 1973: 38. 
Male genitalia with aedeagus as in figures 83, 84 — 
” M. gibsoni (Malloch) 
Synopsis. Closely resembling M. f loris but male 
genitalia entirely distinct. 
Host/Early Stages. Medicago sativa . Larva internal 
stem borer; puparium straw colored, posterior 
spiracles separated by own diameter, each with 4 
or 5 bulbs around central horn. 
Distribution. Arizona, California; also Colorado, 
Texas (according to Frick, 1959). 
References. Malloch, 1915a: 106; Spencer, 1981: 
43. 
39 (37). Frons narrow, less than 1.5 times width of eye 
M. chaptaliae Spencer 
Synopsis. Wing length 2.2 mm; 2 ors, 2 ori; gena 
narrow, 0.10 height of eye; eye distinctly pilose 
in male; mesonotum shining, greenish coppery, 
abdomen more matt; squama and fringe silvery 
27 
