—99- 



Subfumily ELACHISTINAE. 



Abdomen with a more or less distinct petiole. 



Posterior tibiae with very long spurs. Vertex in the middle, and collar acute 



Genus Euplectrus Westwood. 

 Posterior tibias with one or two short spurs. Pronotum subconical. 

 Posterior tibice i-spurred. Scutellum with two dorsal lines. 



Thorax ornamented with light colors. Scutellar sutures straight 



Genus Stenomesius Westwood, 

 Thorax not ornamented with lighter colors Body or at least head metallic... 



Genus Elachistus Spinola. 

 Posterior tibite 2-spurred. Body not metallic. Scutellum with no dorsal lines... 



Genus Miotropis Thomson. 

 Abdomen sub -sessile. Scutellum with two dorsal impressed lines. Posterior tibiae 

 I -spurred. 



Body winged, metallic, often ornate Genus Cirrospilus Westwood. 



Body not metallic. Wings short or none Genus Melittobia Westwood. 



Note. — Foerster's genera Aulogymnus, Dichatomus and Rhicnopelie 

 whijh he places in the Elachistinoe are so insufficiently described that I 

 can:iot bring them into this synopsis without seeing specimens. No 

 American species of any of these three genera have been found. 



Subfamily ELASMINAE. 

 This subfamily consists of the single genus Elasmus which is suffic- 

 iently charictjrizjj m the subfamily synopsis (p 199 of Vol. i ). Five 

 species have been found in this country. 



Subfamily EULOPHINAE. 

 Scutellum with no dorsal lines. 



Antennae inserted in the middle of the face; scape reaches far above the ocelli; (^ 



antennae with 3 branches. Posterior tibiae l-spurred . 



*Genus Hemiptarsenus Westwood. 

 Antennre inserted far below the middle of the face; scape reaches no higher than 

 ocelli. Posterior tibiae usually 2-spurred. 

 Parapsidal sutures complete but delicate. 



Antennae of ^ 3 branched. Abdomen elongate 



*Genus Teleogmus Thomson. 



Antenme of (^ simple *Genus Olinx Foerster. 



Parapsidal sutures not discernible. 

 Posterior tibiae evidently 2-spurred. 



Marginal vein at least three times as long as stigmal. (^ antennae simple; fun- 



icle 5-jointed Genus Sympiesis Foerster. 



Marginal vein not thrice as long as stigmal. (^ antennae 3-branched, very 

 rarely simple. 



Thorax very stout *Genus Cratotechus Thomson. 



Thorax not robust. 



Flagellum of 9 antennae compressed, fusiform, (^ with very short 

 branches. Wings of 9 dusky... *Genus Microplectron Dahlbom. 

 Flagellum of 9 antennae not compressed -fusiform. 



