near Pisgah Forest, 2,500 ft, 
19. VII. 57; (both J. G. Chillcott), in 
CNC. 
Remarks. This species closely 
resembles C. (£. ) inconspicua , but it 
is distinguishable by its paler second 
antennal segment, darker M veins, and 
two sections of vein M 3+4 being 
equal. The male genitalia confirm the 
differentiation of the two species. 
Cerodontha ( Poemyza ) chillcottiella 
Spencer, new species 
(Figs. 555, 556) 
Head. Frons twice width of eye, 
distinctly projecting above eye in 
profile; orbit broad, strongly differ- 
entiated; 2 widely spaced ors, 2 ori, 
orbital setulae sparse, reclinate; 
lunule (deformed) apparently higher 
than a semicircle; gena angular, 
broad, only slightly less than 0.5 
height of eye; 3d antennal segment 
(fig. 555) angulate. 
Mesonotum. 3+1 weak dc, acr sparse, 
in 2-3 rows. 
Wing (fig. 556). Length in female 1.9 
mm, C extending to M 1+2, outer 
crossvein lacking. 
Color. Frons ochreous above, more 
grayish on lower half, orbit and 
entire hindmargin of eye black; gena 
ochreous, parafacial black; all 
antennal segments black; mesonotum and 
scutellum grayish black, largely matt, 
with only weak subshine; notopleuron 
bright yellow, side of thorax other- 
wise black; legs black but knees 
bright yellow; abdomen black, weakly 
shining, all tergites narrowly yellow 
bordered; squama yellowish gray, 
margin and fringe black; ovipositor 
sheath moderately shining but with 
distinct gray dusting. 
Male genitalia. Unknown. 
Host /early stages. Unknown. 
Holotype m. , Colorado, Boulder Co., 
Corona Pass, 10,600 ft, 1 f., 6. VII. 61 
(J. G. Chillcott), in CNC. 
Remarks. In the absence of males the 
generic position of this most 
distinctive species is not entirely 
clear. It is tentatively assigned to 
Cerodontha , subgenus Poemyza , although 
the lunule more closely resembles that 
of Butomomyza species (fig. 540, B) . 
Characters associating the species 
with Poemyza are angulate third 
antennal segment, broad orbit, yellow 
notopleuron, and small size. The 
species is unique in Cerodontha in 
lacking the outer crossvein. This is 
possibly teratological but more 
probably represents a specific 
character. 
There will be no difficulty in 
associating other specimens with the 
unique female holotype, and it is 
hoped that a male will be obtained to 
further clarify this interesting 
species. 
Cerodontha ( Poemyza ) inconspicua 
(Malloch) 
(Fig. 570) 
Agromyza inconspicua Malloch, 1913a: 
310. Holotype male from Colorado in 
USNM. 
Phytobia (Poemyza) inconspicua, Frick, 
1959: 381. 
Cerodontha ( Poemyza ) inconspicua , 
Spencer, 1969a: 129; Nowakowski, 
1973: 93. 
This species was described from a 
single male, but the material now seen 
shows it to be widespread, with 
records from New York to Utah and 
California. 
Spencer (1969a) recorded £. inconspicua 
as widespread in Canada, and the 
aedeagus of a specimen from Alberta 
was illustrated (Spencer, 1969a: fig. 
227). This identification was 
accepted by Nowakowski (1973), who 
recorded the species in Poland and 
Finland. The illustration of the 
aedeagus given by Nowakowski (1973: 
fig. 127) agrees closely with that of 
the specimen from Canada, and it can 
be accepted that the same species is 
involved. However, the aedeagus of 
277 
