22 INSECUTOR INSCITI;E MENSTRUUS 
males in this tribe of flies and this sex of the new species, at 
present unknown, must be an immense insect. 
Ctenacroscelis rex, new species. 
Size very large (wing of the male 40 mm. or over) ; thoracic 
stripes blackish. 
Male. — Length, 33-35 mm.; wing, 40-43.5 mm. Foreleg, 
femora, 82 mm. ; tibia. 23 mm. ; metatarsus, 24 mm. Middle 
leg, femora, 24-25 mm. ; tibia, 21-22 mm. ; metatarsus, 25-26.5 
mm. Hind leg, femora, 27.5 mm. ; tibia, 30 mm. ; metatarsus, 
31.5 mm. 
Frontal prolongation of the head moderately long, reddish- 
brown, the palpi dark brown. Antennae short, brownish yellow, 
the outer face of the flagellar segments with numerous black 
hairs. Head dull yellowish brown with a narrow yellow line 
adjoining the eye. 
Thoracic dorsum bright yellow with three grayish black 
stripes, the median one double, the lateral stripes abbreviated; 
scutum with a large double blackish mark on each lobe ; scutel- 
lum and the median portion of the postnotum brown, sides of 
the segment dull yellow. Pleura dull light yellow, unmarked. 
Halteres slender, dark brown, the knob brighter. Legs with 
the coxse and trochanters yellow ; femora yellow, the tips some- 
what darker ; tibise brownish yellow, the tip indistinctly darker ; 
tarsi brown. Wings very light brownish yellow to subhyaline, 
the costal cell a little brighter, a faint suflfusion along the 
branches of Cu, the stigma indistinct. 
Abdominal tergites dull yellow, the apical sclerites more 
brown. Hypopy.G^ium with the ninth tergite having the caudal 
margin gently concave, the apical third of the segment denselv 
hairy, especially along the outer angles ; outer lobe of the pleu- 
rite long and slender, the base broader, gradually narrowed to- 
ward the tip. 
TTolotype. $ , Tanngoo District. Burma. 
Paratypes, 2 $ , topotypic. 
The type is in the collection of the American Entomological 
Society. Philadelphia. A paratype is in the collection of the 
author. 
