Stegmaier, 1973: 93). We specifical- 
ly referred jto the species as shining 
black and the halter as yellow. 
Hendel interpreted A. lamii as a 
shining black species with the halter 
also black. Three species are known 
in Europe fitting this interpretation — 
A. morionella (Zetterstedt , 1848), 
which is common on Ballota ; A. leonuri 
Spencer, 1971a, known only on Leonurus ; 
and the third, treated as A. lamii , 
feeding on Lamium and Betonica 
(Nowakowski, 1962: fig. 10, Poland). 
These three species can be satisfacto- 
rily separated only by the male 
genitalia. 
A second species is common in Europe 
feeding on Lamium and Ballota and also 
five other genera of the Lamiaceae, 
described as Dizygomyza ( Trilobomyza ) 
lab iat arum Hendel, 1931. This is a 
paler species, with the halter 
yellow. On the basis of Kaltenbach's 
description, Spencer and Stegmaier 
(1973: 93) tentatively interpreted A. 
lamii as this species. 
It seems possible or even probable 
that Kaltenbach had reared both this 
paler species and also one of the 
entirely black species as his descrip- 
tion referred to characters of each. 
However, in the interest of 
nomenclatural stability it is now 
proposed that Hendel 1 s interpretation 
of A. lamii should be followed and A. 
lamii (with the halter black) accepted 
as type of the genus. 
Genitalia studies have revealed that 
two subgenera that Hendel (1931) 
placed in his composite genus 
Dizygomyza — Cephalomyza and 
Trilobomyza — correctly belong in 
Amauromyza (Spencer, 1971a, 1971b). 
Campanulomyza Nowakowski, 1962, was 
also synonymized with Amauromyza , and, 
with existing names available, three 
subgenera — Amauromyza , Cephalomyza , 
and Trilobomyza — were recognized by 
Spencer (1976a: 156). An additional 
European genus, described as Phytobia 
( Melanophytobia ) Hering, 1960, is 
correctly synonymous with Amauromyza , 
but whether or not it deserves sepa- 
rate subgeneric status has not yet 
been established. Two new subgenera — 
Catalpomyza Spencer, 1977c, and Annimy - 
zella Spencer, 1981 — are also now 
accepted. 
Further study of the species included 
in the subgenus Trilobomyza , with jT. 
f lavifrons now recorded here as 
present in the United States, shows 
that there is no justification for 
treating this as distinct from 
Cephalomyza , and this new synonymy is 
formally established here. 
Two new species are described, two new 
combinations established, and two 
other species are briefly discussed 
here. One species is diagnosed but 
not formally described. 
Amauromyza ( Cephalomyza ) abnormal is 
(Malloch) 
(Figs. 489, 490) 
Agromyza abnormal is Malloch, 1913a: 
320. Holotype female from District 
of Columbia in USNM. 
Phytobia (Amauromyza) abnormalis, 
Frick, 1959: 378. 
Amauromyza abnormalis , Spencer, 1969a: 
158. 
Amauromyza ( Cephalomyza ) abnormalis , 
Spencer, 1981: 148. 
The only male that can be referred to 
this species in America is one from 
Riverside County, Calif., and the 
aedeagus is shown in figure 489. The 
only other male known in North America 
is from Quebec. Its genitalia are 
shown in figure 490. These two 
specimens clearly seem to represent 
distinct species, but it is impossible 
at this stage to decide which of the 
two represents the true A. abnormalis . 
It is hoped, therefore, that other 
males will become available from the 
type area and can be associated with 
the female holotype; then the status 
of the two known males can be 
clarified. 
273 
