1957] 
Hull — Tertiary Flies 
45 
whole tarsus shorter than the middle tarsus. Wings : The 
wings are pale brownish hyaline, a little darker in the 
costal cell. The stigma and whole subcostal cell much 
darker and light reddish brown. Marginal cell open by 
more than one and a half times the maximal width of 
this cell. Third vein perfectly straight. Anterior cross- 
vein short, rectangular and situated quite close to the 
base of the discal cell. First posterior cell ends remotely 
from the wing apex by a distance equal to the subapical 
crossvein or end vein of first posterior cell. At the lower 
corner of the first posterior cell there is almost no trace 
of a spur vein and none whatever of the lower corner of 
the discal or second posterior cell. The fourth vein along 
the upper margin of the discal cell is almost entirely 
straight, barely curved apically. The apical petiole of 
the discal cell is fully as long as the subapical crossvein. 
Anal cell closed with quite a long stalk, whole wing 
villose, alula present but narrow. Abdomen : The abdomen 
is clavate, gradually and slightly narrowed towards the 
base, the hypopygium especially large. While well pre- 
served, the abdomen is partly covered by wings. The first 
3 sternites are light yellow, the fourth is dark reddish 
brown with lighter posterior margin, especially laterally ; 
the first 3 sternites have a few, scattered, fine hairs; the 
fourth has numerous, stiff, subappressed hairs. Hypopy- 
gium apically with a few fine, erect, short hairs. Only 
the last tergite shows to advantage and it is much longer 
medially than laterally, tending to cover largely the long, 
bulbous, ventral hypopygium. It is dark, reddish brown 
in color with abundant, short, coarse, subappressed setae. 
Apparently the base of the third tergite is lighter in color. 
Type. Male; Lower Oligocene, Baltic amber, no. 5124, 
in the Museum of Comparative Zoology. This interesting 
species is named in honor of Dr. Frank M. Carpenter. 
