14 MONOGRAPHIA CIIALCIDUM. 



Genus I. Isosoma,'' Walker. 



Caput medium : palpi maxillares 4-articulati : maris antenna; 

 11-articulata;, pilosse, filiformes : femince antennae 1 2-articulatas, 

 pilosae, submoniliformes, clavatse : thorax convexus : abdomen 

 cylindricum. 



* Abdomen ovatum, cylindricum, non compressum. 

 -f Corpus omnino nigrum. 



Sp. 1. Isos. atrum. Fem. Nigrum, alls subfuscis. 



Caput, thorax, et petiolus obscuri, punctati : abdomen nitidum, 

 glabrum: oviductus apice fulvus : antennae basi fuscae: tibiae nigro, 

 tarsi pallide, fusci : genua tibiarumque apices flavi : alae sub- 

 fuscse. (Alarum longitudo, 2 lin.) 



Dull black, pilose : eyes and ocelli black: abdomen smooth, 

 shining, very finely punctured, pilose toward the apex : 

 petiole dull black : punctured apex of the ovipositor yel- 

 low : antennae rather thick, in length equal to one-third of 

 the body, club short, base of the first joint fuscous : legs black: 

 tibiae dark fuscous, pubescent : tarsi pale fuscous : knees and 

 exti-emities of the tibiae yellow : wings slightly fuscous, nervures 

 darker. 



July ; grassy banks ; Southgate. 



-j-j- Prothoracis latera antice inaculata. 



Sp. 2. Isos. longulum. Mas et fem. Nigrum, prothorace 



antice maculis duahus pallidt rujis, alls subfuscis. 



Eurytoma longula. Dahnan. 



Caput obscurum : thorax punctatus, maculis antice duabus late- 

 ralibus pallide rufis : petiolus obscurus, punctatus : abdomen 

 nitidum, glabrum : oviductus apice flavus : antennae basi fuscae : 

 tibicB nigro, tarsi pallide, fusci : genua tibiarumque apices flavi : 

 alae subfuscae. (Alarum longitudo, 2 — 3 lin.) 



Var. — Ocellus anticus rufus. 



Dull black, pilose, punctured : eyes and ocelli black, the 

 anterior ocellus sometimes red : the sides of the proscutellum 

 have each a pale red spot on their anterior margins : the 

 abdomen is smooth, shining, very finely punctured, slightly 



^ I(jos, equalis ; crwixa, corpus. 



