AET. 9 FLIES OF THE FAMILY SYEPHIDAE SHANNON 21 



antenna reddish brown, the joints are 1 : 0.25 : 2,25, arista one-third 

 the length of third joint ; face darkened, the sides yellowish ; thorax 

 dark brown, scutellum, except base, yellowish, hind margin with an 

 indentation; legs dark, fore and mid tarsi yellowish; abdomen 

 broadly ovate ; wings siibhyaline. Length 7 mm. ; wing 7 mm. 



One male. 



Type locality. — Amazon (H. W. Bates). 



Type. — In British Museum. 



MICRODON MACULATUS, new species 



Female. — Medium sized, yellowish with dark thoracic and wing 

 markings; head subhemispherical ; front and face moderately nar- 

 row, yellow, with a small dark spot at ocelli; antennae inserted 

 above the middle of head; first joint about six times as long as 

 broad, four times longer than the second and twice as long as 

 third ; arista longer than third joint ; lower margin of eye border- 

 ing onto oral margin; mesonotum yellow, maculated with dark 

 brown, the apical half almost entirely dark brown, a pair of narrow 

 anterior stripes and a pair of lateral spots on basal half ; meso-hypo- 

 ptero and metapleurae more or less darkened; scutellum small with 

 a small emargination at middle of hind margin; four fore legs 

 lacking; hind legs yellow, femur slender, tibia enlarged, basitarsus 

 moderately enlarged ; abdomen narrowly globose, yellow, a darkened 

 median longitudinal stripe and an incomplete lateral one; wing 

 rather large ; subhyaline with a broad dark stripe across middle and 

 another preapical stripe, anterior margin of wing between the dark 

 stripes yellowish. Length 9 mm. ; wing 9 mm. 



One female. 



Type locality. — Provincia Sara, Santa Cruz de la Sierra, Bolivia 

 (February- April, 1904, J, Steinbach). 



Type. — In British Museum. 



MICRODON NIGRISPINOSUS, new species 



Male. — An elongate, rather yellowish species with dark brown 

 markings; hind femur yellow with a dense set of small black spines 

 beneath. Ocellar region strongly protuberant, dark, front very 

 slightly contracted above antennae; antenna dark brown, relative 

 length of joints 1 : 0.25 : 0.75 ; arista two-thirds the length of third 

 joint; face yellow, yellow pilose; mesonotum yellowish, the disk 

 largely brownish; scutellum small with an apical pair of small 

 spines ; legs yellowish, tarsi brownish ; bases of fore and mid femora 

 on inner side with a conspicuous patch of minute reddish brown 

 bristles; hind femur swollen, with numerous small black spines on 

 lower side of apical two-thirds; tibia distinctly more slender than 



