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 

 paullo brevior, stigmate terminatus. 



-}- Antennae 1 0-articulata\ 



Div°. l a . 



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

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

 cavum : antennae moniliformes, capitis tboracisque longitudine ; 

 articuli 2°. ad 9 um . cyathiformes ; 2 US . et 3 US . mediocres ; 4 US . et 

 5 US . paullo minores ; 6 US . et sequentes latiores, discreti ; 10 us . 

 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 l um . breve, lineare ; 2 um . maximum, abdominis plus 

 dimidium occupans; sequentia brevia, subasqualia : alae medi- 

 ocres ; humerus simplex. 



Fern. — Caput et thorax abdominis cornu receptione sulcata : antennae 

 clavatee, capitis tboracisque vix longitudine ; articuli 2°. ad 4 um . 

 longi-cyathiformes, angusti ; 5 US . et 6 US . multo breviores, non 

 latiores; 7 US . multo latior ; 8 US . et 9 US . adhuc latiores; 10 us . 

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

 gius, apice paullo elevatum ; segmentum 2 um . ejus dimidium 

 occupans; 3 um . et 4 um . brevia; 5 um . et 6 um . longiora : segmenta 

 ventralia eodem modo disposita, marginem utrinque fingentia : 

 cornu arcuatum, levissime striatum, segmenti l 1 . dorso afflxum, 

 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 the 

 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 Fem. Alia, fem. cornu caput 

 postice attingens, aire albo-limpidce. 



