24 NOTES ON CHALCIDI.E. 



venosas. E. gracili affinis ; differt antennis gracilioribus, petiolo 

 longiore, alarum veiiis pallidioribus. 



Female. — Black, very slender. Head and thorax finely punctured. 

 Head a little broader than the thorax. Antennas slender, subclavate, 

 much shorter than the thorax. Petiole short, distinct. Abdomen 

 lanceolate, smooth, shining, a little longer than the thorax. Legs 

 black ; knees and tarsi whitish. Wings pellucid ; veins dingy 

 whitish ; ulna about one-third of the length of the humerus ; radius 

 much shorter than the ulna ; cubitus a little shorter than the radius. 

 Length of the body 1^ line. 



Most allied to E. gracilis, from which the more slender antennae, 

 the longer petiole and the paler wing-veins distinguish it. 



England. 



Genus ISOSOMA. 



I. juncea. Mas. — Nigra, nitens, gracillima; antennas graciles, 

 filiformes, verticillato-pilosae, thoraci asquilongas, articulo lo subin- 

 crassato ; petiolus brevissimus ; abdomen convexum, longi-fusiforme, 

 thorace angustius et multo brevius ; pedes graciles, tarsis quatuor 

 posterioribus genubusque albido-testaceis, illis apice tarsisque autjcis 

 pallide fuscescentibus ; alas angustas, diaphanas, testaceo pallido 

 venosse. 



Male. — Black, very slender. Head and thorax shiniug, extremely 

 finely punctured. Head broader than the thorax. Antennas slender, 

 filiform, verticillate-pilose, as long as the thorax ; scape slightly 

 incrassated ; intermediate joints linear. Petiole very short. Abdo- 

 men convex, smooth, elongate-fusiform, narrower and much shorter 

 than the thorax. Legs slender ; knees, four posterior tarsi and tips 

 of tibiae whitish testaceous ; fore tarsi and tips of four posterior tarsi 

 pale brownish. Wings narrow, pellucid ; veins pale testaceous ; ulna 

 about one-third of the length of the humerus ; radius about one-third 

 of the length of the ulna, a little longer than the cubitus. Length of 

 the body 1 line. 



More slender than I. minor and than I. lineuris. Antennas stouter 

 than those of I. brevis. 



I have not been able to see any humeral spots on the prothorax of 

 the single specimen of this species. 

 England. 



I. kobusta. Mas. — Nigra; antennas sat validas, verticillato-pilosas, 

 thoraci BBquilongs; prothoracis macuhu laterales picee, pMVCB ; peti- 

 olus brevissimus ; abdomen cllipticum, convexum, thorace multo 



