516 MEMOIRS OF THE CARNEGIE MUSEUM 



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

 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. IIOV. 



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

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

 without a row of punctures along the parapsidal furrows ; scape and legs, except the 

 coxae 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. Eiqjhvtrini. 



Genus EUPLECTUS Westwood. 



TABLE OF SPECIES. 



1. .iEneous black. 



All coxiB yellowish-white 2 



Hind coxse 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 



Antenna 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. contmbae. 



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. solilarius. 



Antennae not W'hoUy pale, the pedicel and flagellum brown ; scutellum wholly black ; clypeus and 

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

 Male E. chnpadie. 



EUPLECTRUS BR.\SILIEXSIS, sp. nov. 



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

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

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

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

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



