70 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
Genus Microconops Kréber 
Microconops Kroéber, Arch. Naturg., vol. 81, Abt. A, Heft 1, p. 77, 1915. 
Microconops ater, new species 
Description: Male: Length 7 mm. Front and ocellar tubercle 
black. Vertex dark reddish yellow. Face and upper keel yellow. 
Lower keel and parts of the grooves black. Occiput black above, 
yellow below. Orbit and lower facial grooves white pollinose. An- 
tennae black, lower half of third segment dark yellow. First segment 
two times as long as wide. Second segment 1% times length of first. 
Third segment nearly four times length of first. Arista two segmented, 
basal segment very slightly produced. Proboscis black, 1% times 
length of head. 
Thorax black. White pollinose mark at humeri connected with 
a similar pleural stripe. Some white pollen on postnotum and meta- 
pleura. Coxae and legs dark reddish black. Basal half of tibiae 
yellow. Wings brownish hyaline, without pattern. Calypters 
yellowish white. Halteres yellow, brown at base. 
Abdomen black, dull on first four segments, shiny on fifth and 
sixth segments. Distal narrow white pollinose margin on first or 
third segments. Faintly white pollinose on sixth segment. Genitalia 
shiny blackish red. 
VARIATION (in paratypes): Length 6.5 to 7mm. Antennae dark 
brown instead of black in one male. Other dark areas on legs more 
brownish. Dark areas of abdomen more brownish in the other male 
so that the sixth segment is entirely dark reddish brown. 
Typrs: Holotype, male, USNM 64921, Sydney, New South Wales, 
Bridwell collection. Paratypes, 2 males, USNM and authovr’s collec- 
tion, same data. 
Remarks: This species keys out to nigrithorax, which differs by 
having the antennae deep black and the front reddish yellow. 
Microconops brunnicornis Kréber 
Microconops brunnicornis Kréber, Ann. Mag. Nat. Hist., ser. 11, vol. 5, p. 78, 1940. 
This species was described from a single female from southwestern 
Australia. The male is similar but blacker, and the distal half of the 
posterior femora are mainly black. The male abdomen is dull black 
on the first four segments and shiny on the fifth and sixth. White 
pollinose distal bands are present on segments two to four. The sixth 
segment is diffusely white pollinose. The genitalia are reddish. In 
the female the sixth and seventh abdominal segments are shiny. 
MATERIAL EXAMINED: Sydney, New South Wales, Bridwell collec- 
tion, 2 males, 1 female, USNM and author’s collection. 
