Male genitalia. Aedeagus as in 
figures 1117, 1118; sperm pump minute, 
pale. 
Host/early stages. Unknown. 
Holotype m., Illinois, McHenry Co., 
Algonquin, 4-30-94-34; paratypes 1 m. , 
same data; 1 m . , 5-3-95-109; 1 m. , 
5-9-94-39 / 2287; 1 m. (without head), 
4-30-94-34 / 2268; 1 f., 4-30-94-34 / 
2296; 1 f., 4-30-94-33; 1 f . , 5-8-94; 
(all coll. Coquillett). Holotype and 
paratypes in USNM, 1 m. paratype in 
KAS. 
Remarks. This species closely 
resembles genalis but is distin- 
guishable by the narrower gena, the 
larger eye, and the paler abdomen. 
The male genitalia do not suggest that 
the two species are closely related. 
Phytomyza duplex Spencer, new species 
(Figs. 1085-1087) 
Head. Frons 1.5 times width of eye, 
not projecting above eye in profile; 2 
ors, upper only marginally weaker, 2 
ori, lower substantially weaker, orbit- 
al setulae short, sparse, proclinate; 
gena 0.33 height of eye; 3d antennal 
segment rounded, little longer than 
broad; palpus normal (not elongated). 
Mesonotum. 3+1 strong dc, acr in 4 
rows in front, reduced to 2 rows at 
level of 2d dc . 
Wing (fig. 1085). Length in male 2.5 
mm, outer crossvein present, slightly 
beyond inner, 2d costal section 3.33 
times length of 4th. 
Color. Frons, lunule, gena, and face 
yellow; upper orbit grayish to level 
of lower ors, both vt on dark ground; 
antenna black; mesonotum and scute Hum 
matt gray, without subshine; pleura 
blackish gray; legs black, knees 
distinctly yellow; squama and fringe 
yellow. 
Male genitalia. Aedeagus as in 
figures 1086, 1087, distiphallus 
divided, with characteristic 
curvature; sperm pump with large, 
broad blade, base strongly sclerotized 
at each end. 
Host/early stages. Unknown. 
Holotype m. , Tennessee, Hamilton Co., 
East Ridge, 9.V.52 (G. S. Walley), in 
CNC. 
Remarks. Although this species 
appears to be identical in external 
characters to ]?. davisii , differences 
in the aedeagus confirm that it is 
distinct . 
Two other species in this complex with 
the outer crossvein present are known 
in Europe, JP. ryddni Hering 
( Ranunculus ) and P^. aconitophila 
Hendel ( Aconitum ) . The former is 
distinguishable by the elongate 
proboscis, the latter by the distinctly 
pubescent third antennal segment. In 
both, the aedeagus is of the same form 
as in I>. duplex and davisii , dif- 
fering primarily in the slight but 
distinctive curvature of the distiphal- 
lus (Spencer, 1976a). It is reasonably 
certain that the host is in the 
Ranunculaceae . 
Phytomyza erigerophila Hering (new 
to U. S. A. ) 
(Fig. 1216) 
Phytomyza erigerophila Hering, 1927: 
174. Two female syntypes from 
Germany (Berlin) in ZMHU. 
This species is widespread but local 
in Europe and was recorded from 
Alberta by Griffiths (1976b: 256). 
A single male has now been seen from 
Tennessee, Sevier County, Great Smoky 
Mountains National Park, Indian Gap, 
5,700 feet, 20.V.57 (J. R. Vockeroth), 
in CNC. 
The male genitalia are distinctive 
(fig. 1216), with the left basal 
sclerite greatly reduced and a row of 
strong spinules along the right 
sclerite from the termination of the 
left sclerite to the distal end. The 
315 
