1.75 mm in the female. The male 
genitalia indicate that the two 
species are not closely related (see 
figs. 1098, 1099 and 1093, 1094). In 
C. clemativora the aedeagus lacks a 
ventral lobe and this is replaced by a 
horseshoe-shaped sclerite extending 
beyond the apical end of each basal 
sclerite. There is in addition a 
strong sclerite rising dorsally and 
slightly recurving, finely divided 
distally , attached to the ends of the 
basal sclerites , and to its rear there 
is another central, upright sclerite. 
Only the two type specimens from 
Texas, Cameron County, Brownsville, 
have been known. A single female has 
now been identified from San Patricio 
County, Welder Wild Life Reserve near 
Sinton (240 km north of the type 
locality), 19-23. III. 65 (J. G. 
Chillcott) , in CNC. 
Chroma tomyia comp t a Spencer, new 
species 
(Fig. 1089) 
Head. Frons broad, twice width of 
eye, not projecting above eye in 
profile; 2 equal, reclinate ors, 2 
inclined ori; gena extended at rear, 
0.33 height of eye; 3d antennal 
segment slightly longer than broad, 
rounded at end, with distinct fringe 
of whitish pubescence. 
Mesonotum. 3+1 strong dc, acr in 2 
rows. 
Wing. Length from 2.6 mm in male to 
3.25 mm in female, 2d costal section 
3.5 times length of 4th. 
Color. Frons, hindmargin of eye, 
palpus, and 1st and 2d antennal 
segments bright yellow, 3d segment 
black; mesonotum uniformly matt gray; 
scutellum yellow, sometimes suffused 
with gray, but always yellow between 
basal scutellars viewed from rear; 
side of thorax largely yellow; legs 
with coxae and femora bright yellow, 
tibiae and tarsi yellowish brown; 
abdomen largely yellow, tergites some- 
times narrowly grayish in front; squama 
yellow, margin and fringe dark. 
Male genitalia. Aedeagus (fig. 1089) 
with strong, paired, diverging 
sclerites above front end of basal 
sclerites, horseshoe-shaped sclerite 
in same plane distally of basal 
sclerites; ejaculatory duct long, 
sinuous; sperm pump with large, weakly 
pigmented blade. 
Host/early stages. Unknown. 
Holotype m. , North Carolina, Swain 
Co., Great Smoky Mts. National Park, 
Clingman's Dome, 6,300-6,642 ft, 
20.V.57; paratypes 4 f . , same data; 
3 m. , 28.V.57; (all J. R. Vockeroth); 
1 f., 21 .V. 65 (J. G. Chillcott); 1 f., 
6. VIII. 57 (C. J. Durden); Yancey Co., 
Mt. Mitchell, 6,800 ft, 1 m., 
12. VIII. 57 (J. G. Chillcott); Mt. 
Richland-Balsam, 6,000-6,400 ft, Blue 
Ridge Parkway, 1 f., 30.V.65 (J. G. 
Chillcott); Tennessee, Sevier Co., 
Great Smoky Mts. National Park, Indian 
Gap, 5,200 ft, 1 m., 3 f . , 28.V.57 (j. 
R. Vockeroth); Virginia, Shenandoah 
Co., Hawksbill , 3,600-4,050 ft, 1 m. , 
3 f., 7. VI. 62; Smyth Co., Mt. Rogers, 
5,300-5,700 ft, 1 m., 1.VI.62 (J. R. 
Vockeroth). Holotype and paratypes in 
CNC, other paratypes in KAS. 
Remarks. This is the largest known 
Chroma tomyia species and one of the 
few with predominantly yellow 
coloration. Although generally 
resembling a number of Phytomyza 
species, the strong, dorsally directed 
"supporting sclerites" and the 
distinctive ejaculatory duct below 
clearly indicate the correct generic 
position in Chroma tomyia . 
£. compta appears to be related to C. 
clemativora and this suggests that its 
host is probably also Clematis sp. 
Chroma tomyia doolittlei Spencer, new 
species 
(Figs. 1292-1294) 
Head. Frons exceptionally broad, 3 
times width of eye; 2 equal ors, 1 ori; 
gena 0.33 height of eye, parafacial 
prominent; 3d antennal segment small, 
round, finely pubescent. 
324 
