24 MONOGRAPHIA CHALCIDITUM. 



genua et tarsi picea : alse fere limpidse ; nervi nigro-fusci. (Corp. 

 long. lin. If ; alar. lin. 2^) 



May ; on grass in woods ; near London. 



Isos. brevicolle, (Haliday.) Mas. Prcecedenti simile at va- 

 lidius, antenncs crassiores, aim latiores. 



Atrum : antennae latce, corporis dimidio paullo longiores : abdomen 

 thorace brevius, fere planum : tarsi nigri : alae limpidse ; nervi 

 picei, (Corp. long. lin. 1| ; alar lin. 22.) 



Found on sand-hills^ at Port Marnock, by Mr. Haliday. 



Isos. brevipenne. Fem. I. angustato similis, alts hreviores, 

 angustiores. 



Atrum, angustum : abdomen thoracis longitudine : genua et tarsi 

 picea : alse subfuscse, breves, angustae ; nervi fusci. (Corp. long, 

 lin. 1 ; alar. lin. 1.) 



Found near London. 



Genus — Euryto 



MA. 



Eur. fumipennis. Mas et Fem. Atra, tarsi ruji, alee 

 fusccB. 



Mas. — Antennae graciles, corporis dimidio multo longiores : genua 

 rufa : alarum nervi picei. 



Fem. — Multo brevior et latior. (Corp. long. lin. 1| — 1| ; alar. lin. 

 June ; Windsor Forest. New Forest, Hampshire. 



Genus — Decatoma. 



Dec. mesomelas. Fem. Flava, anteniice metathorax abdo- 

 minisque dorsum nigra, alee limpidce, macula apud stigma 

 quadrata minima. 



D. mellea brevior : caput inter ocellos et postice nigro-varium : 

 oculi picei : ocelli rufi : antennae apice piceae ; articulus 1^^ 

 flavus : mesothoracis scutum antice utrinque nigrum : ungues et 

 pulvilli picei : alis nervi flavi, maculae fuscje. (Corp. long, lin. 

 l—lj; alar. lin. 1|— U-) 



June ; oak woods, at Lara in the county of Wicklow ; Mr. 

 Haliday. July; near London. 



