Mr. Walker's Deseriptions 0/ Clialcidites. 103 



XIV. — Descriptions of some new species of Chalcidites. By 

 Francis Walker, Esq., F.L.S. 



Isosoma Hoidei (Harris MSS.), Mas. Atrutn, antennae nigra, pedes fulvi, 

 femora piceo-vittata, tarsi JIavi, alee limpidce. 



Corpus atrum, convexum, angustum, sublineare, parura nitens, scite 

 punctatnm, parce liirtum: caput transversum, breve, thorace vix latius; 

 vertex latus ; frons impressa, abrupte declivis : oculi picei, mediocres, non 

 extantes: antennae nigrfe, pubescentes,filiformes, graciles, corpore breviores : 

 thorax fusiformis : prothorax magnus, transversus : mesothoracis scutum 

 lougitudine latius ; parapsiduni suture bene determitiatas, postice approxi- 

 matae; scutellum subconicum : metathorax sat magnus, declivis, obconicus; 

 petiolus sat longus : abdomen sublineare, nitens, lasve, thorace brevius ; seg- 

 menta 1"" et 2"'° magna: pedes fulvi, simplices, subsequales ; coxae nigrae; 

 femora piceo-vittata; tarsi flavi, apice fusci : alse limpids ; squamul^ piceae ; 

 nervi fulvi ; nervus humeralis ulnari duplo longior, radialis uinari multo bre- 

 vior cubitali vix longior, cubitalis sat longus; stigma minutuni. (Corp. 

 long. lin. 1\; alar. lin. 2.) 



Parasitic on a species of Cecidomijiu. Presented to me by Dr. Harris of 

 Philadelphia. 



Isosoma Laothoe, Fcm. Afrum, prothoraci maculis genubusque flavis, 

 tarsis piceis, aiis Umpidis, nervis fulvis. 



Atrum, convexum, punctatum, parce pubescens, parum nitens : caput 

 thorace vix latius: oculi et ocelli picei: antennae graciles, extrorsum cras- 

 siores, thorace paullo breviores : prothorax mesothorace angustior utrinque 

 flavo-maculatus : mesothoracis parapsides extantes, suturie optime determi- 

 natas ; scutellum parvuni : metathorax declivis, convexus, carinatus : petio- 

 lus brevis : abdomen fusiforme, nitens, laeve, glabrum, apice acuminatum, 

 thorace vix longius ; segmenta 1'"" et 2"" parva ; 3"" et 4'"" longiora; o"" 

 et 6"" breviora : pedes nigri ; genua flava ; tarsi picei : alae limpidae; squa- 

 mulae piceae ; nervi fulvi. (Corp. long. lin. 1 ; alar. lin. l-J-.) 



Taken by Dr. Greville at Juniper Green near Edinburgh. 



Perilampus Entellus, Mas. Viridis, anteimce picece, pedes virides fulvo- 

 cincti, tarsi fulvi, alee limpidce. Fem, Cyaneus, antennce nigrce. 



Mas. Corpus bi-eve, crassum, convexum, viride, nitens, rude punctatum, 

 parce hirtum : caput transversiun, breve, thoracis latitiuline ; vertex latus, 

 aeneo-varius ; frons cyanea, impressa, fere lasvis, abrupte declivis : oculi rufi, 

 mediocres, non extantes : antennas piceae, longifusiformcs, thorace paullo 

 breviores ; articuli valde approximati ; 1'" longus, gracilis, cyaneus : thorax 

 ovatus : prothorax transversus, brevis ; mesothoracis scutum lougitudine 

 latius ; parapsidum suturae non bene delerminatae, postice approximate ; 

 scutellum magnum, obconicum, apice elevatum, metathoracem feve obtegens: 

 metathorax transversus, abrupte declivis, postice angustus : petiolus brevis- 

 simus : abdomen Iseve, contractum, latitudine vix longius ; segmenta 1"" et 

 2"™ maxima : pedes virides, pubescentes, simplices, subsequales; trochanteres 

 fulvi ; genua fulva ; tibiae apice fulvie ; tarsi fulvi, apice fusci : ate limpidae ; 

 squamulae piceae ; nervi fusci ; nervus humeralis ulnari plus duplo longior, 

 radialis ulnari paullo brevior cubitali multo longior, cubitalis brevis; stigma 

 minutura. 



Fem. Corpus cyaneum : antennae nigrae: pedes cyaneo-varii. (Corp. long, 

 lin. 1^—2; alar. lin. 3— ;3^.) 



Var. /3. Mas, Tarsi flavi, apice fusci. 



Var. y. Fem. Corpus purpureo-varium. 



Found by R. Forster, Esq. in Ohio. 



