392 Mr. F. Walker on some North American Cbalcidites. 



lem alii deducant^ ego non. Lente et modeste perpendant Me- 

 dusae ne virtutem lianc obtineant ex aqua_, vel hsec a Medusis 

 immensis scilicet Oceanus minimse sui parti tanta miracula de- 

 bebit V' 



XLIV. — Characters of undescribed Cbalcidites collected in North 

 America by E. Doubleday, Esq., and now in the British Mu- 

 seum. By Francis Walker, F.L.S. 



1. Pteromalus Lausus, fem. Niger, abdomen viridi cupreo et pur- 

 pureo varium, antenna picece, pedes fiavo-fulvi, femora nigra, alee 

 sublimpidce. 



Corpus breve, crassum, convexum, nigrum, obscurum, scitissime 

 squameum, pilis albis hirtum: caput transversum, breve, thoracis lati- 

 tudine ; vertex latus ; frons impressa, abrupte declivis : oculi picei, me- 

 diocres, non extantes : os piceum: antennse picese, graciles, extrorsum 

 crassiores, thorace paullo longiores ; articulus l"^longus, linearis, ful- 

 vus ; 2"* fuscus, cyathiformis ; 3"* et 4"^ minimi ; S""* et sequentes sat 

 longi, usque ad 10"™ curtantes ; clava fusiformis, apice ferruginea, ar- 

 ticulo 10° paullo latior et multo longior : thorax ovatus : prothorax 

 transversus, brevissimus : mesothoracis scutum longitudine latius ; 

 parapsidum suturse vix conspicuse ; scutellum brevi-obconicum : meta- 

 thorax brevis, declivis : petiolus brevissimus : abdomen ovatum, nitens, 

 Iseve, nigro-viride, basi cupreo et purpureo varium, supra planum, 

 subtus profunde carinatum, apice acuminatum, thorace paullo longius 

 vix angustius ; segmentum 1""" magnum ; 2"™ et sequentia breviora, 

 subsequalia]: pedes nigri, simplices, subsequales ; trochanteres picei ; 

 genua fulva ; protarsi fulvi ; mesotarsi et metatarsi flavi, apice fusci : 

 alse sublimpidse ; squamulse picese ; nervi fusci ; nervus humeralis ful- 

 vus ulnari paullo longior, ulnaris valida radiali fere duplo longior, 

 cubitalis radiali paullo brevior ; stigma sat magnum, obscurius. 

 (Corp. long. lin. 1|; alar. lin. 3.) 



It is allied to Pteromalus intermedins, Eutelus intermedins, Ent. Mag. 

 ii. 366. 



2. Pteromalus Cratylus, fem. Ater, abdomen nigro-ceneum, antenna 

 picece, pedes flavi, femora nigra, alee limpidce. 



Corpus breve, latum, crassum, convexum, atrum, obscurum, sci» 

 tissime squameum, parce hirtum : caput transversum, breve, thorace 

 paullo latius ; vertex latus ; frons impressa, abrupte declivis : oculi 

 picei, mediocres, non extantes : antennae picese, subclavatse, graciles, 

 thorace paullo longiores ; articulus 1"® fulvus, longus, linearis; 2"® cya- 

 thiformis ; 3"* et 4"^ minimi ; 5"^ et sequentes mediocres, usque ad 

 10"™ curtantes et latescentes ; clava conica, acuminata, articulo 10** 

 duplo longior : thorax brevi-ovatus : prothorax transversus, brevis- 

 simus : mesothoracis scutum longitudine latius ; parapsidum suturse 

 vix conspicuse ; scutellum obconicum : metathorax brevis, declivis : 

 petiolus brevissimus : abdomen nigro-seneum, brevi-ovatum, nitens. 



