420 



British parasitic HymenSptera. 





ovatus; abdomen subsessile thoracis magnitudine, ovato-depressum, postice 

 subconicum. 



Antennae 8-jointed, the 1st joint dilated near the tip, the remaining 

 joints forming a flattened fusiform club, the 4th joint rather larger than 

 the 3d and 5th, the 7th joint minute subquadrate, the terminal one very 

 minute subulate; thorax ovate; abdomen nearly sessile ovate depressed, 

 as large as the thorax, somewhat conical at the apex ; wings large ; tarsi 

 short tetramerous. 



Spec. 1. Clost. trifasciatus Westw. Niger, thorace caeruleo-viridi ; 

 abdomine chalybeo-nigro ; oculis fuscis; alis fasciis duabus arcuatis, api- 

 ceque fuscis ; tarsis basi pallidis. Variat fascia antica fere obliterata. 



Long. corp. ■§ lin. ; expans. alar. l£lin. In mus. nostr. Habitat apud 

 Ensham, prope Oxoniam ; Augusto, 1826. 



Black, with the thorax greenish blue ; the abdomen chalybeate black ; 

 eyes brown ; wings with two arched fasciae, and the apex brown; the tarsi 

 pale at the base. 



At Ensham, near Oxford, in August, 1826. Oaks, Richmond Park, 

 August, 1833.* 



CephaloWmia f Westw., Teleadi affinis. Caput $ mediocre fere 

 rotundatum, 9. magnum oblongo-quadratum planum ; antennae in utroque 

 SfcXu 10-articulatae, articulo secundo tertio multo majori, $ filiformes 

 longitu dine fere thoracis, 9. capite non longiores fere moniliformes, haud 

 apicem versus incrassatae ; collare triangulare, antice rotundatum ; alas 

 nervo subcostale brevi (tertiam partem longitudinis alarum non attin- 

 genti), callositate parva ad costam terminata, alteraque subapicali discum 

 versus posita; nervo stigmaticali nullo (fig. 55. f ) ; 9 interdum aptera. 



Antennae 10-jointed in both sexes, with the 2d joint larger than the 3d; 

 in the male filiform, and nearly as long as the thorax ; in the female, sub- 

 moniliform, and not longer than the head, which is oblong, quadrate, and 

 flattened ; thorax elongate-ovate ; collar large and triangular, rounded in 

 front ; wings with a very short subcostal nerve, terminated by two minute 

 callous spois; 9 sometimes apterous (d). 

 MO ■•>7/T<h // .( ) ,1 f o ,,*.. ,<» -< v ,\\ .y 7 ,>;j 



* Speciem alteram (Closterocerus formosus Westw.') cepi e quercu, in 

 "Richmond Park," Aug. 16. 1833. Caeruleo-viridis, abdomine cyaneo 

 fasciato, antcnnis nigris, pedibus nigro alboque variis, alis fascia substigma- 

 ticali nigra. Magn. Clost. trifasciati. 



f Kephale, the head, and cniomoios, unlike ; from the dissimilarity of the 

 form of the head in the sexes. 



