232 Mr. Walker on the British Chalcidites. 



filial, prominent, dark brown : antenna' three, frontal, filiform, 

 rather short, equal in size and equally distanced, porrect, 

 faintly annular. Segments twenty-five in the specimen exa- 

 mined, distinct, broader than long, the post-occipital and anal 

 considerably less than the others and with proportionally 

 small appendages : feet papillary, uniramous, each armed with 

 a dorsal cirrus twice as long as the foot, obscurely moniliform, 

 colourless, and with two bundles of bristles, the superior bun- 

 dles consisting of short stout retractile bristles, jointed near 

 the top, and with a spine in their middle ; the inferior bundles 

 of very long setaceous unjointed hairs, which the worm has 

 no power of withdrawing. The first pair of feet is destitute 

 of this inferior bundle. The anal extremity was wanting in 

 the only specimen I have yet met with, but from the repara- 

 tion which had begun I believe it to be terminated by two 

 styles similar to the dorsal cirrus. 



[To be continued.] 



XXV. — Descriptions of British Chalcidites. By Francis 



Walker, F.L.S. 



[Concluded from p. 32.] 

 Genus Pteromalus, Sivederus. 



*> 



Fern. P. disco proximus : corpus breve, convexum, parum nitens, scitis- 

 sime squameum, parce hirtum : caput transversum, breve, thorace latius ; 

 vertex latus ; frons abrupte declivis : oculi mediocres, non extantes : an- 

 tennae subclavata?, thorace longiores ; articulus l us gracilis, sublinearis; 2 ,,s 

 longus, basi ad apicem latescens ; 3 US et 4 US minimi ; 5 US et sequentes breves, 

 approximati, usque ad 10 um curtantes ; clava longiovata, articulo 10° duplo 

 longior : thorax ovatus : prothorax transversus, brevissimus : mesothoracis 

 scutum longitudine paullo latius ; parapsidum suturae vix conspicuae ; scu- 

 tellum conicum : metathorax transversus, mediocris, declivis, postice an- 

 gustior : petiolus brevissimus : abdomen nitens, laeve, latitudine paullo lon- 

 gius, supra planum, subtus carinatum, thorace multo brevius paullo latius : 

 pedes simplices, subaequales : alae angustae ; nervus humeralis ulnari fere 

 duplo longior, radialis ulnari paullo brevior cubitali longior; stigma mi- 

 nutum. 



Sp. 1. Pter. Promulus, Fern. Viridi-cyaneus, abdomen purpureo-cuprenm, 



antenna fuse ce, pedes flavo-fulvi, femora viridi-picea, alcefusccp. 

 Viridi-cyaneus : oculi et ocelli rufi : antennae fuscae ; articulus l us et 2 lis 



