13 



Art. II. — Monographia Chalciditum. By Francis 

 Walker, Esq. F.L. S. 



( Continued from Fol. I. page 466. J 



" the green myriads in the peopled grass." 



Family. — ^Leucopsid^. 

 Genus Leucopsis/ Fabricius. 



Vespa . . Swammerdam, Suher, Christ. 



Cynips . . De la Tourette, Gmelin. 



Leucospis. Fabricius, Gmelin, Laireille, Olivier, Fillers, 

 Rossi, Ciivier, Panzer, Jiirine, Walckenaer, 

 Illiger, Spinola, Fuessly, Dalman, Klug, 

 Fonscolombe. 



Leucopsis. Lamarck, Dumeril. 



Corpus punctatum, supra pubescens : caput mediocre, transversum, 

 thorace vix angustius, antice ubi scapi insident excavatum : 

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

 tennae maris et fera. similes, medio frontis insertas, 14-articulatse, 

 clavatffi, pubescentes ; scapus in canaliculo frontali receptus ; 

 flagellum subincurvum ; articulus l"^ s. scapus elongatus ; 2"*. 

 brevis, cyathiformis ; 3"^ elongato-cyathiformis ; 4"^ et 7 se- 

 quentes fere lineares, latiores, breviores ; 12"^ mediocris, apice 

 angustior ; 13"^ et 14'^^. minimi, vix conspicui : labrum breve, 

 transversum, antice impressum : mandibulae fere rectse, sequales, 

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

 maxillae elongatae, graciles, apice acuminatae, externe pilosae, 

 interne apicem versus in lobum productse bipartitum tenuem 

 mollem ciliatum : palpi 4-articulati, filiformes ; articulus 1"^. 

 elongato-cyathiformis; 2"^^. longior ; 3"^ 2". brevior; 4"^ 2°. 

 longior : mentum elongatum, angustum, apice trispinosum : palpi 

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

 subclavati, 2'^*'. 1". brevior, 3"^. longior : labium fere cordiforme, 

 molle ; anguli antici producti ; margo anticus ciliatus, medio 

 impressus : thorax ovatus : prothoracis scutellum maximum, 

 subquadratum, antice paullo angustius ; segmenta reliqua dorsalia 

 supra occulta ; pectus parvum : mesothoracis scutum maximum ; 



a AeuKos albus, o\^i% facies. I think, with Dumeril, that the name of the 

 genus is derived from these words. 



