1918] Ludlow—Trichoprosopon Theobald (Diptera; Culicide) 67 
width, dark highly iridescent (blue-greens to copper colored) scales, 
the apex at times almost white, labellee dark; palpi dark, very 
slender, as long or slightly longer than the proboscis, unplumed, 
apical joint acuminate; antenne light stemmed, with narrow dark 
bands, and heavily dark verticelled, two rows in each whorl, the 
slender apical joints at times appearing white; the first joint 
testaceous and rather heavily scaled on the median aspect; clypeus 
dark, heavily clothed with, and having a heavy fringe of dark 
hairs; eyes dark turning to copper color. 
Thorax pro-thoracic lobes sub-lateral, with flat scales, probably 
brown, but with brilliant blue to white iridescence, and a few short 
dark bristles; mesonotum dark with flat closely appressed golden 
to bronze scales on the cephalo-laterad portion, a few dark bristles 
on the median line at the nape, and the rest of the mesonotum 
covered with dark brown spindle-shaped or broadly curved scales, 
and short brown bristles on the lateral margins and at the wing 
joints; the scutellum is light testaceous, clothed with dark flat 
scales having blue (cobalt) to white iridescence, six bristles on the 
mid-lobe and two to four (apparently variable) bristles on the 
lateral lobes; metanotum dark brown with a small bunch, probably 
about ten short, dark bristles at the median apical point and about 
four rows of flat scales with blue to white iridescence extending 
from these bristles to the base of the metanotum on the median 
line; pleura light, well clothed with brilliant white (silvery) small 
flat scales. 
Abdomen covered with dark brown scales having brilliant (cobalt) 
blue iridescence that in some lights runs toward mauve, but seems 
not to lose the blue entirely at any time. There are large light 
golden lateral spots, rather heavier at the apex of the segments, 
and the same color extends on the venter which is markedly banded 
with dark scales on the apex of most of the segments. The apical 
joints are definitely bristly, and the bases of the claspers rather 
heavily scaled. 
Legs, coxee and trochanters light scaled, but with a narrow blue 
band; femora are as a whole dark dorsally, the scales having a 
brilliant blue to purplish iridescence, and the ventral aspect has 
light yellow to copper colored (or bronze) scales sometimes ex- 
tending well toward the knee joint, all are heavily scaled at the 
apex forming a bunched effect. The remainder of the fore legs is 
