Mr. Walker's descriptions o/Chalcidites/rom Valdivia. 27 1 



XXXIX. — Descriptions of Chalcidites discovered in Valdivia 

 by C. Darwin, Esq. By Francis Walker, F.L.S. 



Pachylarthrus Sariaster, Mas. Viridis, antenna lutece, pedes flavi, alee 

 limpidcE. — Fern. Cupreus, antennae nigra, pedes fulvi, femora viridia. 



Mas. Corpus crassum, convexum, nitens, viride cupreo-varium, scite squa- 

 meum, parce pubescens : caput magnum, transversum, breve, viride, thorace 

 latius; vertex latus, cupreo-varius ; frons impressa, abrupte declivis : oculi 

 rufi, mediocres, non extantes: os flavum ; palpi maxillares clavati; antennas 

 luteae, graciles, subfiliformes,13-articulatae, thorace paullo longiores; articulus 

 l«s longus, gracilis ; 2 US longicyatbiformis ; 3 US et 4 US minimi ; 5 US et sequentes 

 usque ad 10 um mediocres, subaequales ; clava longiconica, acuminata, arti- 

 culo 10° fere duplo longior : thorax ovatus, robustus : prothorax transversus, 

 brevis, antice angustus: mesothoracis scutum longitudine latius; parapsi- 

 dum suturae bene determinatae, postice approximates ; paraptera et epimera 

 magna; scutellum subconicum, sat magnum: metathorax mediocris, obco- 

 nicus, declivis r petiolus sat longus : abdomen rhombiforme, contractum, 

 laeve, glabrum, latitudine non longius, thoracis dimidii longitudine ; seg- 

 mentum l um maximum, dorsum obtegens: pedes flavi, simplices, subasquales; 

 coxae virides ; ungues et pulvilli fusci : alae limpidae; squamulae luteae; nervi 

 fulvi; nervus humeralis ulnari multo longior, radialis ulnari vix brevior, cu- 

 bitali duplo longior ; stigma minutum. 



Fern. Cupreus, parum nitens : caput thorace vix latius : palpi maxillares 

 simplices : antennae nigrae, subfiliformes, thorace non longiores ; articulus 

 2** cyathiformis ; 5 US et sequentes usque ad 10" m subaequales, approximati ; 

 clava conica, articulo 10° longior : petiolus brevis : abdomen ovatum, supra 

 fere planum, subtus carinatum, apice acuminatum et attenuatum, thorace 

 vix longius; segmentum l um magnum, 2 um et sequentia brevia: pedes fulvi; 

 coxae virides ; femora viridia, apice fulva. (Corp. long. lin. 1 — 1-^; alar, 

 lin. If— 2*.) 



Dicyclus Lynastes, Fem. Viridi-ceneus, antennce nigra, pedes fulvi, fe- 

 mora cenea, alee limpidce. 



Corpus breve, convexum, viridi-aeneum, nitens, scitissime squameum, 

 parce hirtum : caput transversum, breve, thorace paullo latius; vertex latus; 

 frons impressa, abrupte declivis : oculi rufi, mediocres, non extantes : an- 

 tennae nigrae, graciles, subclavatae, thorace vix longiores ; articulus l us lon 

 gus ; 2 US cyathiformis ; 3" 9 et 4 U8 minimi ; 5 US et sequentes usque ad 10 um sub- 

 aequales, approximati ; clava conica, compressa, acuminata, articulo 1 0° 

 multo longior : thorax ovatus : prothorax transversus, brevis, antice angus- 

 tus : mesothoracis scutum longitudine latius, parapsidum suturae remotae, 

 sat bene determinatae, postice approximatae ; paraptera et epimera magna ; 

 scutellum subconicum, mediocre : metathorax brevi-obconicus, declivis : pe- 

 tiolus brevis : abdomen subrotundum, supra fere planum, subtus carinatum, 

 apice acuminatum, tliorace brevius ; segmentum l" m magnum : pedes fulvi, 

 simplices, subaequales ; coxae aeneae ; femora senea, apice fulva ; tarsi apice 

 fusci : alae limpidae ; squamulae piceae ; nervi fulvi ; nervus humeralis ulnari 

 multo longior, radialis ulnari vix brevior, cubitali longior ; stigma minutum. 

 (Corp. long. lin. -| ; alar. lin. 1-J-.) 



Lamprotatus Natta, Mas. Viridi-cyaneus, antennce nigra, pedes flavi, 

 alee limpidce. 



Corpus angustum, sublineare, convexum, viridi-cyaneum, nitens, scitis- 

 sime squameum, parce hirtum : caput transversum, breve, viride, thorace 

 latius; vertex latus, aeneo-varius ; frons impressa, abrupte declivis : oculi rufi, 



