OF THE ISLAND OF ST. VIKCENT. 155 



vein once and a half as long as the stigmal, the latter ending in a 

 rather large circular stigma. 



Sab, St. Vincent. 



Described from a single specimen. 



Subfamily Pteeomalin^. 

 Tribe Chieopachides. 

 AcEOCOEMUS, Forster. 



ACEOCOEMTTS MEGASTIGMTJS, sp. n. 



S . Length 2'1 millim. Dull metallic green, confluently punc- 

 tate ; pleura, hind femora, and abdomen seneous black, smooth, 

 shining ; scape and legs, except coxse, brownish yellow, anterior 

 and middle femora and posterior tibise dusky. Flagellum cylin- 

 drical, pilose ; the first f unicle-joint the longest, almost as long as 

 the scape, the following joints gradually subequal. Pronotum 

 longer than its width at base, narrowed into a neck anteriorly. 

 Mesonotal furrows delicate but complete, the lateral lobes short, 

 the middle lobe twice as long as wide. The axillae extend forward 

 into the field of the parapsides to a line with the tegulse. Scu- 

 tellum with a straight impressed line at the sides. Metathorax 

 with a median carina. Wings hyaline, ciliate, with a dusky 

 substigmal band, extending to the middle of the wing, and a 

 small dusky spot at the middle below the base of the marginal 

 vein ; marginal vein slender and long, about as long as the sub- 

 marginal vein ; stigmal vein short and terminating in a large 

 oblong stigma that runs parallel with the postmarginal. Anterior 

 femora not thicker than the hind femora ; posterior tibi© with 

 two apical spurs. 



Sah. St. Vincent. 



Described from one specimen. The large stigma, resembling 

 that found in the genus Binotus, at once distinguishes the species. 



Tribe Sphegiq-asteides. 

 Ctetogastee, Walher. 



Ctetogastee vulgaeis, WalTc. Tint. Mag. i. p. 382. 



Sab. St. Vincent, Europe, United States, 



Eour specimens of what is evidently this European species are 

 in the collection. It is very variable in colour, from aeneous 

 black to metallic bronze and green, the legs from orange-yellow 

 to fuscous and black, the female always having the paler-coloured 



12* 



