separated by the male genitalia. In 
his revision of North American 
Calycomyza species, Frick (1956) 
attempted to differentiate all species 
on minor color differences, particular- 
ly the degree of darkening of the 
orbit, but in practice his key has not 
proved reliable. With additional 
species now known, 10 species in what 
may loosely be termed the C. malvae 
group are included in couplets 21-30, 
separated only by differences in the 
aedeagus. 
Steyskal (1973a) examined for the 
first time the male genitalia of C. 
jucunda , and it then became clear"~that 
this species had been misinterpreted. 
The species feeding commonly on 
several genera of Asteraceae and 
common in Florida and California is 
now accepted as C. platyptera and not 
£. jucunda (Spencer, 1981). The 
synonymy of £. coronata with C. 
jucunda established by Frick (1956: 
288) is tentatively accepted. Another 
species, closely related to C. 
jucunda , is C. menthae . 
Illustrations are given of the 
genitalia of the holotypes of C. 
jucunda (figs. 884, 885) and c7 
coronata (figs. 886, 887) and of a 
topotypical paratype of C. menthae 
(figs. 888, 889). As will be seen, 
the distiphallus differs only in minor 
detail. A final decision as to 
whether the differences noted are 
specific or within the range of 
variation of a single species feeding 
on Lamiaceae can only be made when 
additional reared material becomes 
available; therefore, no nomenclatur- 
al changes are proposed now. 
All known species of Calycomyza are 
leaf miners in the six families — 
Asteraceae, Boraginaceae, Convolvul- 
aceae, Lamiaceae, Malvaceae, and 
Verbenaceae. Of the 30 species in the 
United States, the host is known of 
20; of these, 10 feed on the 
Asteraceae . 
Calycomyza is a relatively small genus 
of 54 known species occurring 
predominantly in the Nearctic and 
Neotropical Regions. Only single 
endemic species are known in Africa 
and in Europe. Of the Nearctic 
species, only humeralis 
(semicosmopolitan) and C, solidaginis 
are present also in Europe. Only two 
species, (J. novascotiensis Spencer, 
1969a, and £. sonchi Spencer, 1969a, 
are endemic in Canada. Two new 
species are described here (part 2, p. 
299). 
Key to Calycomyza 1. Squamal fringe at least partially pale, white or 
Species yellow 2 
Squamal fringe dark, brown or black 10 
2 (1). Discal cell unusually small, last section of vein 
M 3+4 3-4 times length of penultimate; minute 
species, wing 1.1—1.25 mm long (3. minor Spencer 
Synopsis. Frons and gena orange yellow, upper 
orbit conspicuously black; 1 ors, 2 ori; gena 
0.33 height of eye; all antennal segments black, 
face grayish, more yellow below; mesonotum moder- 
ately shining black; humerus, notopleuron, and 
hindcorner of mesopleuron grayish yellow; legs 
black; squama and fringe whitish yellow; wing 
length from 1.1 mm in male to 1.25 mm in female, 
outer crossvein sometimes only slightly distad of 
inner; male genitalia with aedeagus as in figures 
871, 872. 
Host/Early Stages. Conyza canadensis . Larva 
141 
