52 Prof. Charles P. Alexander on 



yellow, the knobs brown. Legs obscure yellow, the extreme tips 

 of the femora and the terminal tarsal segments darkened; tibial 

 spurs present. Wings with a faint yellowish tinge; stigma barely 

 indicated ; veins pale brownish yellow. Venation : <SV:1 ending 

 opposite the origin of Rs, Sc2 some distance from the tip of Scl, the 

 latter alone about one-half longer than r — w ; Es rather short, gently 

 arcuated; 7?2 + 3 straight; cell 1st M2 relatively small; basal 

 deflection of Cul approximately at the fork of 31, in some slightly 

 basad of, in others slightly beyond this fork. 



Abdominal tergitcs brown, the sternites obscure yellow; a sub- 

 terminal brownish black ring in the male. Male hypopygium as 

 in the genus. Penis-guard conspicuous, longer than the pleurites, 

 moderately stout, the tip curved. Outer pleural appendage with 

 appressed teeth, the apex produced into a spine. Ninth tergitc 

 small, the margin with a very broad V-shajJcd notch, the lateral 

 angles appearing as divergent horns. 



Hab. Paraguay. 



Holotype, ^, San Bernardino (Fiebrig). 



Allotopotype, $, pinned with the type. 



Type in the collection of the Vienna Museum. 



Atarba punctiscuta, sp. n. 



General coloration shiny yellow ; antennae of the male moderately 

 elongate ; antennal flagellum almost uniformly dark brown ; 

 mesonotal praescutum with a narrow, dark brown, median line ; 

 each scutal lobe with two dark brown blotches; femora with a 

 narrow brown subterminal ring; wings j^ellow, the cord narroAvly 

 seamed with browoi; abdomen obscure yellow with a conspicuous 

 black subterminal ring. 



Male. — Length 5-3 mm. ; wing 5'5 mm. 



Rostrum obscure yellow; palpi brown. Antennae of moderate 

 length, if bent backward extending to just beyond the base of the 

 abdomen ; scapal segments yellow, flagellum dark brown, only the 

 extreme bases of flagellar segments one to three indistuictly 

 brightened. Head yellow; centreof the vertex slightly darkened. 



Mesonotal praescutum shiny yellow with a conspicuous dark- 

 brown median stripe, broadest anteriorly, becoming obliterated at 

 the suture; scutum yellow, each lobe with a large, dark- brown 

 blotch occupying the latero-cephalic third and a smaller similai 

 area on the proximo- caudal third ; the join passes through this part 

 of the body and it cannot be determined whether these two latter 

 areas are confluent across the median line; scutellum testaceous 

 yellow; postnotum with the median sclerite browTi, the lateral 



