268 ON THE SPECIES OF PLATYGASTER. 



Genus II. — Inostemma, Haliday. 



Psilus, Jurine. Platygaster, Latreille, &c. 



Proalae cuique nervus unicus basalis proxime sub costam, alae triente 

 pauUo brevior, stigmate terminatus. 



"i" Antenme 1 0-articulntce. 



Div". F. 



Mas. — Corpus parce et breviter pubescens : caput breve, trans- 

 versum, thoracis latitudine, antice vix productum, postice con- 

 cavum : antenuje moniliformes, capitis thoracisque longitudine ; 

 -articuli 2". ad 9"'". cyathiformes ; 2"^ et 3"s. mediocres ; 4"^ et 

 .'j"^ paullo minores ; 6"^ et sequentes latiores, discreti ; 10^^ 

 angusti-ovatus, acuminatus, 9". longior: thorax ovatus, convexus : 

 prothorax parvus, supra brevissimus, utrinque longior : mesotho- 

 racis parapsidum suturae conspicuae ; scutellum fere planum, non 

 prominens, semicirculum fingens : metathorax mediocris : abdo- 

 men angusti-ovatum, thorace paullo longius, basi angustius ; 

 segmentum 1""\ breve, lineare ; 2"™. maximum, abdominis plus 

 dimidium occupans; sequentia brevia, subsequalia : alae medi- 

 ocres ; humerus simplex. 



Fein. — Caput et thorax abdominis cornu receptione sulcata : antennas 

 clavatse, capitis thoracisque vix longitudine ; articuli 2°. ad 4"™. 

 longi-cyathiformes, angusti ; 5"*. et 6"^ multo breviores, non 

 latiores; 7"'. multo latior ; 8"^ et 9"^ adhuc latiores; 10u^ 

 ovatus, vix acuminatus : abdomen acuminatum, quam mari lon- 

 gius, apice paullo elevatum ; segmentum 2"™. ejus dimidium 

 occupans ; 3"™. et 4^°^. brevia ; 5"™. et 6"™. longiora : segmenta 

 ventralia eodem modo disposita, marginem utrinque fingentia : 

 cornu arcuatum, levissime striatum, segmenti 1'. dorso afSxum, 

 thorace applicatum et caput attingens : oviductus abdomine duplo 

 longior, in cornu receptus ? 



The female in this division has a horn rising from the first 

 segment of the abdomen, and bending over the thorax to tiie 

 head. Its use has not yet been ascertained ; Leclerc de Laval 

 supposed that it incloses the ovipositor ; but Nees ab Esenbeck 

 denies this. 



Sp. 1. Ino. Boscii. Mas et Fern. Atra, fem. cornu caput 

 postice attingens, ala- albo-limpidcc. 



