PARASITIC HYMENOPTERA. 335 



antennae nigra; $ articulo 2''°. fere duplo longiore quam 3"°.: 

 collare, scuti mesothoracici apex et metathoracis latera vage 

 punctata pubescentia, reliqua fere laevia suturis punctatis s. 

 crenatis : abdomen nigrum nitidissimum chalybeo micans, apice 

 pubescens : pedes nigri nitidi, tarsis flavo-ferrugineis apice fuscis : 

 alae hyalinae s. lutescentes nervis fusco-ferrugineis. 



Tolerably abundant throughout both islands, in pastures 

 and marshes." Varies much in size, more frequently falling 

 short of the dimensions given, (especially the males), the 

 smaller individuals are also blacker and smoother. 



Gen. II. — L^STHiA. Halidaij. 



Caput ohlongo quadrattim, margine orali utrinque et front e 

 antice mticronatis, OcuU minuti glabri. Antennce infra 

 mediam fac'iem insertce remotce, — femince 9-articulatce 

 clavatcs, — maris lO-artiadatce ante apicem incrassatce. 

 Collare antice attenuatum. Alee fere nullce. Abdomen 

 sahsessile ovatum depression. 



Caput magnum antice hand attenuatum, ore prominulo, margine 

 supra mandibulas utrinque mucronato : frons leviter depressa 

 carinula media elevataj inter antennas mucronatA : ocelli 3 in 

 triangulum positi, postici occipitales minutissimi, in $ incon- 

 spicui : antennae — femincs longitudine thoracis, scapo trientem 

 longitudinem adequante, pedicello clavato longiore quam articulo 

 3''°. sequentibus subglobosis sensim crassioribus ultimo longe 

 maximo ovato-acuminato ; — maris paulo longiores pedicello 

 minore, flagello sensim incrassato, articulis 9""°. lO"". rursus angus- 

 tioribus arete connatis, 10™". longiore apice attenuate : mandi- 

 bulas breves subquadratae apice inagqualiter denticulatas : labrum 

 et maxillae fere quales Spalancjice : palpi labiales biarticulati, 

 articulo l'"". clavato, 2*°. utrinque attenuate — maxillares longiores 

 conformes : thorax oblongus capite longior et angustior : collare 

 crateriforme antice attenuatum : mesothorax quadratus, scuto 

 transverse humeris minutissimis, scutello transverse subquadrato, 

 parapteris minutissimis valde remotis : alse scutello baud longiores 

 decumbentes coriaceae : metathorax brevis constrictus : abdomen 

 thorace longius et latius, (praesertim in 9 >) ovatum subdepres- 

 sum, aculeo exerto brevi subconico parum compresso : pedes 

 quam in Spalangia breviores (baud saltatorii ?) ; coxae et femora 



^ *' In excrementis hurnanis." — Spinola. 



