174 MB. W. H. ASHMEAD ON THE PAEASITIC HTMENOPTEEA 



The spotted anterior wings and the shape of the abdomens 

 readily distinguisli the species. 



Deeostentjs acuttjs, sp. n. 



c? 2 . Length 1 millim. Thorax gold-green, scaly-punctate j 

 head wider than thorax, smooth, blue-black or purplish with an 

 aeneous tinge ; flagellum dark brown, covered with a whitish 

 pubescence ; scape and legs white ; thorax and abdomen beneath 

 purplish or bluish, the latter above with an seneous tinge. Wings 

 hyaline. The abdomen is acutely produced, briefly petiolated, 

 and as long as the head and thorax united. 



The male agrees well with the typical female except in the 

 antennae, shape of abdomen, and the colour of the anterior coxae j 

 the flagellar joints are slightly longer, with long hairs, the an- 

 terior coxae bluish or metallic, the middle and posterior coxas 

 usually dusky at base, while the abdomen is subovate or 

 spatulate. 



Hob. St. Yincent. 



Described from two male and twelve female specimens. 



Deeostenus eotundus, sp. n. 



S 5 • Length 0"65 to 0"8 millim. Blue-black or purplish, im- 

 punctate, the upper part of thorax and abdomen aeneous ; fla- 

 gellum brown-black ; scape and legs white ; wings hyaline j 

 abdomen rounded, briefly petiolated, not longer than the thorax^ 

 usually shorter : flagellar joints in female about twice as long as 

 thick, pubescent ; in male shorter, with longer hairs. 



Hob. St. Vincent. 



Described from six male and four female specimens. 



The rounded abdomen distinguishes this species from all others- 

 in the genus. 



Chbtsochaeis, Forster. 

 Tahle of Species. 

 Females. 

 Thorax brownish yellow, with a violaceous tinge 



anteriorly 2. 



Thorax always metallic or blue-black. 

 Abdomen conic-ovate. 

 Blue-black. 

 Thorax and abdomen metallic green, the former 

 scaly-punctate ; legs entirely white. 

 Anterior wings with a substigmal blotch . . C. stigmatus, sp. n. 



