516 MEMOIRS OF THE CARNEGIE MUSEUM 



more or less dusky medially, the tarsi paler yellowish. Wings hyaline, the ^eins 

 yellowish. Abdomen conically pointed, longer than the head and thorax united, 

 depressed above, convex beneath towards base. 



Brazil : Chapada, in January. One female specimen. 



Tetrastichus incongruus, sp. nov. 

 Female. — Length 1.5 mm. Black, the head smooth, shining, except some 

 minute punctures, in front near the eyes, the thorax microscopically shagreened, 

 luithout a row of punctures along the parapsidal furrows ; scape and legs, except the 

 coxse honey-yellow, the femora a little darkened. Wings hyaline, the veins yel- 

 lowish. The abdomen, as seen from above, is rounded, as in the genus Syn 

 Forster, shorter than the thorax ; beneath it is carinate. 

 Brazil : Santarem. One female specimen. 



Subfamily IV. Elachertin^. 

 Tribe I. Eupledrini. 



Genus EUPLECTUS Westwood. 



TABLE OF SPECIES. 



1. ^neous black. 



All coxse yellowisli--wliite • • • 2 



Hind COXES black. 



Legs, except the hind coxae and the hind femora, honey yellow, the hind femora brownish 

 at the thickened portion. Female; E. brasiliensis. 



2. Legs yellowish-white. 



Antennae wholly pale yellow or with the flagellum wholly brown 3 



Antennse not wholly pale yellow, the six last joints brown ; basal half of abdomen beneath and 

 above, testaceous, the apical half black, as well as a streak at sides basally ; clypeus and malar 

 space black E. corumbse. 



3. Antennse wholly pale yellowish ; scutellum basally purplish ; metallic green apically ; a triangular area 



at base of metanotum connected with a median carina ; body of abdomen rufous basally ; clypeus 



reddish ; malar space black. Male E. solitarius. 



Antennse not wholly pale, the pedicel and flagellum brown ; scutellum wholly black ; clypeus and 

 cheeks testaceous ; body of abdomen beneath, except just at apex, and above basally, rufous. 

 Male E. chapadse. 



EUPLECTRUS BRASILIENSIS, Sp. UOV. 



Female. — Length 1.6 mm. ^neous black, the head and thorax with long, 

 sparse hairs ; clypeus honey yellow ; antennse, except faintly toward apex, and the 

 legs, except the hind coxae and the hind femora, honey yellow, the hind coxse 

 black, the hind femora more or less brownish except at base. Wings hyaline, 

 pubescent, the tegulse and the veins pale yellowish. The abdomen is black, with a 



