variable, last section of M 3+4 from 
1.67 to 2.5 times penultimate. 
Color. Frons orange to brownish, 
orbit frequently paler, yellow; 3d 
antennal segment varying from orange 
to brown; palpus yellowish brown; 
mesonotum blackish gray, with only 
moderate subshine, scutellum dark at 
sides, always at least slightly 
yellowish centrally; humerus and 
notopleuron usually slightly yellowish, 
sometimes almost completely blackish 
gray, pleura otherwise dark; legs 
almost entirely black, apart from 
yellowish knee and foreleg, sometimes 
also on midleg; abdomen matt black; 
epandrium in male and ovipositor 
sheath in female brilliantly shining 
black; squama gray, margin and fringe 
dark; halter whitish yellow. 
Male genitalia. Aedeagus (figs. 695, 
696) with slightly sinuate paired 
tubules; sperm pump with large black 
blade; surstylus elongate, with single 
spine at end. 
Host/early stages. Unknown. 
Holotype m., Colorado, Clear Creek 
Co., Mt. Evans, Timberline, 11,700 ft, 
22. VII. 61 (W. R. Mason and B. H. 
Poole); paratypes 7 m. , 11 f . , same 
data. Holotype and paratypes in CNC, 
other paratypes in KAS. 
Remarks. The form of the male geni- 
talia associates this species with L. 
equiseti de Meij. (as L. kenti Spencer, 
1969a), L. nordica Spencer, 1969a, and 
L. balcanicoides Sehgal, 1971, known 
in Canada, and with L. freyella 
Spencer, 1976a, from Finland. 
However, it is readily distinguishable 
by the darker frons and third antennal 
segment from all these species. 
Liriomyza endiviae Hering (new to 
U.S.A. and North America) 
(Figs. 824-827) 
Liriomyza endiviae Hering, 1955: 205. 
Holotype male from Spain in BMNH. 
The type series was reared from blotch 
mines on Sonchus oleraceus . In 
addition, Hering referred to the mines 
of this species on Crepis capillaris 
(L. ) Wllr. from northern France and on 
Lactuca virosa from northern Germany. 
A series of 23 specimens from Washing- 
ton, reared from Lactuca sativa, L. 
serriola (as scariola ) , and Taraxacum 
vulgare , are now identified as L. 
endiviae . The aedeagus (figs. 824, 
825) agrees exactly with that of the 
holotype; the distiphallus is relative- 
ly small and the mesophallus is long 
and slender. The sperm pump is 
conspicuously large and characteristi- 
cally angular at the upper corners 
(fig. 826). Characters of the adult 
show some variation. In the holotype, 
the third antennal segment is distinct- 
ly darkened and orange brown; four of 
the American specimens are similar, 
but in the others all antennal segments 
are yellow. The arrangement of the 
orbital bristles is normally two ors 
and two ori, but, as pointed out by 
Hering in the description, the lower 
ori may be weak or even lacking. This 
variation also occurs in the American 
specimens. The third antennal segment 
is slightly pubescent but not conspicu- 
ously so. L. endiviae is readily 
distinguishable from L. ptarmicae 
(couplet 38), in which the third 
antennal segment is treated as having 
long pubescence, as this has both vt 
on black ground. 
L. endiviae belongs to a group of 
closely related species known in 
Europe feeding on Hieracium , Lactuca , 
Scorzonera , Sonchus , Taraxacum , and 
Tragopogon . In L. sonchi Hendel the 
mesophallus is broader and shorter than 
in L. endiviae (Spencer, 1976a: fig. 
481), whereas in L. taraxaci Hering 
the mesophallus is even shorter (figs. 
828, 829). 
The different form of leaf mine in L. 
scorzonerae Ryddn, which starts as a 
lower surface mine, confirms the 
distinctness of this species, although 
the aedeagus is scarcely separable 
from that of L. endiviae (see Spencer, 
1976a: figs. 479, 480). In L. trago- 
287 
