13 



Art. II. — Monographia Chalciditum. By Francis 

 Walker, Esq. F.L. S. 



( Continued from Vol. I. page 466. ) 



the green myriads in the peopled grass." 



Family. — Leucopsim:. 

 Genus Leucopsis^ Fabricius. 



Vespa . . Sivammerdam, Sulzer, Christ. 



Cynips . . De la Tourette, Gmelin. 



Leucospis. Fabricius, Gmelin, Latreille, Olivier, Fillers, 

 Rossi, Cuvier, Panzer, Jurine, Walckenaer, 

 Illiger, Spinola, Fuessly, Dalmati, Klug, 

 Fonscolombe. 



Leucopsis. Lamarck, Dumeril. 



Corpus punctatum, supra pubescens : caput mediocre, trausversum, 

 thorace vix angustius, antice ubi scapi insident excavatum : 

 oculi mediocres : ocelli 3, supra verticem trigone dispositi : an- 

 tennae maris et fern, similes, medio frontis insertae, 14-articulata2, 

 clavatae, pubescentes ; scapus in canaHculo frontali receptus ; 

 flagelluni subincurvum ; articulus l us . s. scapus elongatus ; 2 US . 

 brevis, cyathiformis ; 3 US . elongato-cyathiformis ; 4 US . et 7 se- 

 quentes fere lineares, latiores, breviores ; 12 us . mediocris, apice 

 angustior ; 13 us . et 14 us . minimi, vix conspicui : labrum breve, 

 transversum, antice impressum : mandibulas fere rectas> sequales, 

 bidentatae ; dentes obtusi ; internus brevis, latus, fere geminus : 

 maxillae elongatae, graciles, apice acuminatse, externe pilosae, 

 interne apicem versus in lobum productse bipartitum tenuem 

 mollem ciliatum : palpi 4-articulati, filiformes; articulus l us . 

 elongato-cyathiformis ; 2 US . longior ; 3 US . 2°. brevior ; 4 US . 2°. 

 longior : mentum elongatum, angustum, apice trispinosum : palpi 

 3-articulati, fere filiformes, menti apicem versus inserti ; articuli 

 subclavati, 2 US . 1°. brevior, 3 US . longior : labium fere cordiforme, 

 molle ; anguli antici producti ; margo anticus ciliatus, medio 

 impressus : thorax ovatus : prothoracis scutellum maximum, 

 subquadratum, antice paulld angustius ; segmenta reliqua dorsalia 

 supra occulta ; pectus parvum : mesothoracis scutum maximum ; 



a Aeu/cbs albus, otyts facies. I think, with Dumeril, that the name of the 

 genus is derived from these words. 



