New or Little-hnoum Exotic TipuUdae. 51 



elongate, one-half longer than the body; flagellar segments bi- 

 nodose, dark brown, the base and apex of the segments white to 

 give the organ an annulated appearance; scape and first flagellar 

 segment pale brown. Head brown. 



Mesonotal praescutum light brownish grey with four narrow brown 

 stripes; scutum light brown, the lobes with a narrow bro\\Ti line, 

 converging behind to the scutellum which is dark brown, paler 

 posteriorly; postnotum brown, sparsely pruinose. Pleura obscure 

 yellow with a broad, dark brown, pleural stripe, clearly delimited 

 ventrallj^, moi-e diffuse dorsally, extending about to the wing- root; 

 mesosternum dark brown medially. Halteres obscure yellow, the 

 knobs dark bro^vn. Legs with the coxae yellowish testaceous, the 

 fore coxa darkened basally ; trochanters testaceous ; femora brown, 

 paler basally, the tips conspicuously white; tibiae white with a 

 faint tinge of darker ; tarsi of middle and hind legs white ; fore legs 

 broken. Wings with a strong yellowish brown tinge; r and the 

 cord narrowly seamed with darker brown ; veins brown. Venation : 

 r on Rl far from the tip, the distal section of El a little longer than 

 the petiole of cell M3 ; R2 -f 3 about one-half longer than the 

 deflection of i?4 + 5 ; cell 311 small. 



Abdominal tergites dark brown, the sternites slightly paler, 



Hab. Brazil. 



Holotype, (^, Espirito Santo (Ex Coll. Fruhstorfer). 

 Type in the collection of the Vienna Museum. 

 Polymcra tibialis is readily distinguished from all described 

 species of the genus by the almost uniformly white tibiae. 



Atarba fiebrigi, sp. n. 



General coloration obscure yellow; antennae of the male moder- 

 ately long, flagellar segments bicolorous; extreme tips of the 

 femora darkened; wings with a faint yellowish tinge, the stigma 

 barely indicated; Sc2 some distance from the tip of Scl. 



Male. — Length about 5-8 mm. ; wing 6-8 mm. 



Female. — Length about 6-4 mm. ; wing 7 mm. 



Rostrum obscure yellow; palpi yellowish brown. Antennae 

 of male moderately elongate, if bent backward extending to beyond 

 the base of the abdomen ; scapal segments obscure yellow ; basal 

 flagellar segments bicolorous, the basal half obscure yellow, the 

 distal half black, the amount of yellow decreasing on the outer 

 segments, those toward the tip of the organ being uniformly 

 blackened. Head yellowish grey. 



Mesonotum obscure yellow without distinct markings, the base 

 of the postnotum a little darker. Pleura obscure yellow. Halteres 



