186 MR. W. H. ASHMEAD OK THE PAEASITIC HTMENOPTEEA 



The long antennse, closely resembling those of a male, the 

 ■conical pronotum and its smooth surface, readily distinguisli the 

 species. 



Tetrastichus acutipennis, sp. n. 



2 . Length 0'9 millim. Black, shining, impunctate ; antennae 

 .and legs, except the coxae and the femora at the middle, honey- 

 jellow or pale brownish yellow ; mouth-parts yellowish. Head 

 transverse, deeply impressed anteriorly on the frons, the vertex 

 therefore thin autero-posteriorly. Thorax short, oval, the collar 

 very short, scarcely visible from above ; the mesonotum smooth, 

 broader than long, with the parapsidal furrows distinct, the 

 median grooved line very faint ; the scutellum convex, with two 

 grooved lines ; the metathorax very short, smooth. "Wings 

 hyaline, fringed ; the hind wings lanceolate, acutely pointed at 

 tips. Abdomen conic-ovate, pointed at tip, depressed above, 

 convex beneath, and aeneous black. 



Flagellum clavate, pubescent, about twice as long as the scape ; 

 the funicle-joints submoniliform ; the club stout, fusiform. 



Sai. St. Yincent. 



Described from two female specimens. The species is dis- 

 tinguished from the others by its smaller size, colour of antennse, 

 and the pointed hind wings. 



Tetrastichus basilaris, sp. n. 



$ . Length 1'5 to 2 millim. Black, shining, with a slight 

 aeneous tinge ; head below the antennae and the eyes piceous or 

 pale ferruginous ; scape, pedicel, a spot at base of abdomen, and 

 the legs yellowish or whitish, the coxae black, the femora some- 

 times dusky toward base. The face has two rows of punctures 

 between the facial impression and the eyes ; the thorax is faintly 

 alutaceous ; the collar distinct, rounded before and with a row of 

 punctures along the posterior margin ; mesoscutum with a single 

 TOW of punctures along the parapsidal furrows. Wings hyaline, 

 pubescent, the venation pallid or pale brownish yellow. Abdomen 

 conic-ovate or conically produced, longer than the head and 

 thorax together. 



Flagellum clavate, two and a half times as long as the scape ; 

 the funicle-joints nearly twice as long as thick, the club stouter, 

 three-jointed. 



Hab. St. Yincent. 



Described from 50 female specimens. 



