be identical with L. trifolii and the 
synonymy was established by Spencer 
(1973a: 226). 
Examination of the holotype of L. 
allia has confirmed that it is 
distinct from L. trifolii ( allivora ) , 
and the male genitalia are shown in 
figures 843, 844. This species — with 
a misleading name as the host is 
unknown and certainly not onion — is 
indistinguishable on external 
characters from L. fricki , a feeder on 
Fabaceae, but the genitalia of the two 
do not suggest that they are closely 
related. 
Liriomyza arctii Spencer (new to 
U.S.A.) 
(Figs. 736-738) 
Liriomyza arctii Spencer, 1969a: 167. 
Holotype male from Ontario in CNC. 
This species is distinctive in having 
the frons and antennae bright yellow 
and the femora and mesopleuron 
predominantly black. The aedeagus is 
shown in figures 736, 737. 
Leaf mines on Arctium minus are common 
in August and September in Minnesota, 
Minneapolis, Minnehaha Creek, and one 
male was reared 3.X.78 (KAS). Another 
male was reared 21. IX. 76 at Madison, 
Wis. (S. Tavormina) . 
Liriomyza blechi Spencer 
(Figs. 668-672) 
Liriomyza blechi Spencer, in Spencer 
and Stegmaier, 1973: 98. Holotype 
male from Florida in USNM. 
This species was described as a leaf 
miner on Blechum (Acanthaceae) . The 
male genitalia (figs. 669, 670) and 
long anterior spiracles of the 
puparium (fig. 672) show that L. 
blechi is closely related to L. margin - 
alis (figs. 673-677), a leaf miner on 
grasses. 
A leaf miner on Plantago has 
previously been recorded in the 
literature (Coquillett, 1898: 77; 
Malloch , 1913a: 282; Frost, 1924: 47; 
all as L. melampyga ) . Specimens ex 
Plantago in Florida were tentatively 
recorded as L. blechi (Spencer and 
Stegmaier, 1973: 99), and other 
specimens from Mississippi (K. E. 
Frick) have now been examined. The 
single character that appears to 
differentiate L. blechi is the long 
hair at the end of the cercus (fig. 
668) ; this is also present in the male 
recorded here from Texas. It is 
lacking in specimens seen ex Plantago , 
but all other characters, including 
the color of the adults, details of 
the aedeagus and epandrium, and both 
anterior and posterior spiracles of 
the puparium, appear to agree 
exactly. In view of this, it is not 
considered desirable to treat the 
population on Plantago as distinct at 
this stage. Other specimens have been 
reared from Heliotropium (Boragina- 
ceae), Lippia (Verbenaceae) , and 
Spigelia (Loganiaceae) , and in none of 
these is the long cereal hair present. 
A caught male from Sao Paulo, Brazil 
(in BMNH) , appears to be identical to 
these specimens. 
In all species in this group the 
entire terminalia are conspicuously 
pale, virtually without pigmentation. 
A further significant character is 
that the normal arrangement of the 
dorsocentral bristles is two strong 
postsutural dc and one equally strong 
presutural. However, in a few 
specimens an additional third 
postsutural is present. 
The leaf mine on Blechum is an irregu- 
lar blotch (fig. 671), normally but 
not exclusively associated with the 
midrib or one of the lateral veins. 
Insufficient material is available from 
Plantago and the other hosts to be 
certain whether this larval feeding 
habit applies here also. 
It is barely possible that a second 
polyphagous species is present, dis- 
tinguishable only by the cereal hair, 
but further detailed study is desirable 
before such splitting can be justified. 
285 
