1938] 
Fossil Insects 
115 
$ . A yellowish species, the thorax, head, palpi, and base 
of the proboscis brown; the abdomen is very light yellow 
along the narrow posterior margins and on the venter ; the 
antennae are slightly darkened basally. Pile concolorous 
Fig. 2. Plecia creedensis James, n. sp., drawing of wing of 
holotype, No. 4523, M. C. Z. 
with the background. Halteres evenly light yellow. Each 
tibia with a short, black preapical bristle. Wings slightly 
yellow-f umose, the veins yellow ; those of the posterior part 
of the wing evident, though definitely lighter than the heavy 
anterior veins. 
Length, 12 mm. ; of abdoment, 8 mm. ; of wing, 9 mm. 
The following measurements are in millimeters. Anterior 
femur, 2, tibia, 2.3, tarsus, 2.6; middle femur, 1.8, tibia, 1.8, 
tarsus, 1.9; posterior femur, 2.7, tibia, 2.8, tarsus, 2.4; 
length of head, .8, of antennae, .8, of thorax, 2.7 ; length of 
vein Rs to cross-vein r-m, 1.5, of Rs from r-m to origin of 
R2-\-3, .7, of cross-vein r-m , .4, of M from r-m to the furca- 
tion, .4; distance of apex of R1 from base of wing, 6.4, of 
origin of R2-\-3 from base of wing, 5.1. 
Holotype (female) : No. 4523, Museum of Comparative 
Zoology. This specimen is well preserved and is in lateral 
position, so that practically all characters of taxonomic 
importance are visible. 
Paratypes: twelve females; eleven (Nos. 4524-4532) in 
the Museum of Comparative Zoology, and one in the Museum 
of the University of Colorado. Eight other specimens are 
present in the collection at the Museum of Comparative 
Zoology, but they are not designated as paratypes because 
of poor preservation. 
