Male genitalia. Aedeagus (figs. 796, 
797) with distiphallus short, not 
widening distal ly; sperm pump with 
narrow stalk, blade small but widening 
at end, base well developed. 
Host/early stages. Asclepias speciosa . 
Larva forming irregular, interparenchy- 
mal mine (fig. 798), which is frequent- 
ly partially linear, with frass 
detectable in 2 lines of strips, but 
often develops into secondary blotch; 
mine appears greenish and may be 
difficult to detect as a true mine; 
pupation externally; several mines may 
be present in a single leaf. 
Holotype m. , Washington, Yakima Co., 
Donald, ex larva on Asclepias speciosa , 
13. VI. 49 (K. E. Frick, Lot 210 - 1); 
paratypes topotypical, same data, 9 
m. , 6 f. Holotype and paratypes in 
CAS, other paratypes in KAS. 
Remarks. This species is indis- 
tinguishable from L. asclepiadis 
externally, but the male genitalia of 
the two species differ substantially 
(figs. 792, 793 and 796, 797), although 
of the same general form. Further 
confirmation that separate species are 
involved is provided by differences in 
the leaf mines. In L. asclepiadis the 
larva forms a primary upper surface 
blotch (fig. 794), whereas in L. sub - 
asclepiadis the feeding is interparen- 
chymal, of varying depth, and at least 
in part linear. 
This is an interesting instance of 
relatively recent speciation with no 
differences having yet developed in 
external characters, and the two 
species apparently separated by the 
Sierra Nevada mountains. 
Liriomyza taraxaci Hering (new to 
U.S.A.) 
(Figs. 828-830) 
Liriomyza taraxaci Hering, 1927: 184. 
Holotype male from Germany in ZMHU. 
This species belongs to the closely re- 
lated group feeding on the Asteraceae 
Liguliflorae. It has previously been 
recorded in Canada (Spencer, 1969a: 
188), and leaf mines on Taraxacum 
officinale have now been seen from 
Wisconsin, Dane County, Madison, 
31.V.75 (S. Tavormina). With the 
species confirmed in the Ottawa area 
at approximately the same latitude as 
Madison, there is little reasonable 
doubt that the mines found at Madison 
represent L. taraxaci . 
As far as is known, L. taraxaci is 
host specific on Taraxacum , whereas L. 
endiviae feeds on Lactuca, Sonchus , 
and possibly Crepis (p. 287). The two 
species are not satisfactorily dis- 
tinguishable based on external 
characters but are distinctive in 
having the hindmargin of the eye 
largely yellow, with both vertical 
bristles thus on yellow ground, and 
the black of the occiput at most 
reaching the eye margin for a short 
distance well beyond the outer 
vertical. There are distinctive 
differences in the male genitalia of 
the two species (see figs. 824, 825 
and 828, 829). 
Two specimens reared by K. E. Frick 
from Taraxacum vulgare at Washington, 
Benton County, Prosser, 14. VI and 
10. VII. 49, are possibly referable to 
L. taraxaci , but at this locality L. 
endiviae was common on Lactuca and 
possibly this was the species 
concerned . 
Liriomyza temperata Spencer, new 
species 
(Figs. 805, 806) 
Head. Frons broad, twice width of 
eye, not projecting above eye in pro- 
file; 2 ors, 2 ori, orbital setulae 
sparse, reclinate; gena extended at 
rear, 0.33 height of eye; 3d antennal 
segment small, round. 
Mesonotum. 3+1 strong dc, acr in 4 
rows, inner pos talar strong. 
Wing. Length 2.3 mm in male, up to 
2.5 mm in female, last section of vein 
M 3+4 just over twice length of 
penultimate . 
294 
