18 MONOGRAPHIA CHALCIDUM. 



Sp. 10. Isos. breve. Mas. Nigrum, prothorace antice macn- 

 lis duabus pallide Jlavescentibus, alls subfiiscis. 



Caput obscurura : oculi rufo-fusci : ocelli rufi : thorax punctatus, 

 maculis antice duabus lateralibus pallide flavis : petiolus obscurus, 

 punctatus : abdomen nitidum, glabrum : femora apice, tibiae basi 

 apiceque flavae : tibiae anticae fuscae : tarsi flavi : alae subfuscae. 

 (Alarum longitudo, \l — \\ lin.) 



The body, antennae, and wings, are shorter in this species 

 than in Isos. longicorne; the latter, too, are paler : the tips of the 

 thighs and tibia?, and the base of the latter, are yellow, as also 

 are the tarsi, except the two terminal joints, which are fuscous, 

 as likewise the anterior tibiae : the wings are slightly fuscous. 



July ; amongst grass in fields ; Southgate. September ; 

 Isle of Wight. 



Sp. 11. Isos. minor. Mas. Nigrum^ prothorace antice maculis 

 duabus albidis, alis subhyalinis. 



Caput obscurum : oculi rufo-fusci : ocelli rufi : thorax punctatus, 

 maculis antice duabus lateralibus albidis : petiolus obscurus, 

 punctatus : abdomen nitidum, glabrum : tibiae anticas fuscae : 

 genua flava : tarsi fusci, basi pallidiores : alae subhyalinae. 

 (Alarum longitudo, 1| — If lin.) 



It is smaller than the preceding species, which it much 

 resembles : the antennae are shorter and more slender : the 

 wings also are shorter and narrower: in some specimens, 

 probably lately hatched, the eyes and ocelli are paler: the 

 wings are nearly hyaline. 



July ; amongst grass in fields ; Southgate. September ; Isle 

 of Wight. End of May ; Southampton. 



Sp. 12. Isos. elongatum. Mas. Nigrum, pracedentiangusiius, 

 prothorace antice maculis duabus albidis, alis subhyalinis. 



Caput obscurum : oculi ocellique rufi : thorax punctatus, maculis 

 antice duabvis lateralibus albidis : petiolus obscurus, punctatus : 

 abdomen nitidum, glabrum : femora tibiaeque apice, tibiae tarsi- 

 que basi flavi : tibiae anticae tarsique fiisci : alae subhyalinae. 

 (Alarum longitudo, li— 1-'- lin.) 



It is longer and more slender than either of the two pre- 

 ceding species : from the latter it may also be distinguished 



