124 OrpER—HYMENOPTERA. 
Species 4—TRIGONALYS JUCUNDA. 
(Westw. Trans. Ent. Soc. Lond. 1868, part iv. December, p. 327.) 
Puate XXIII, Fie. 8. 
Rufo-fusco et flavo varia, minute punctatissima: alis hyalinis, anticarum dimidio costali fusco ; pedibus 
rufis, tibiis basi albidis ; antennis fuscis, basi fulvis. 
Long. corp. lin. 43; expans. alar. antic. lin. 10. 
Habitat ; Amazonia (Bates). In Mus. Hopeiano Oxoniz. 
Caput flavum, vertice late castaneo, nigro cincto ; antenne long, 24-articulate, apice gracillime, articulis 
8 basalibus fulvo-rufis, apice fusce ; thorax castaneo-rufus; collaris lateribus, maculis duabus anticis mesonoti, 
alteris duabus ad basin scutelli, post-scutello, et maculis duabus ad apicem metanoti, flavis; scutello nigricante ; 
abdomen ad basin castaneum, ad apicem nigricans, segmentorum margine apicali flavo, segmentis ventralibus 
in medio inermibus. 
Species 5—TRIGONALYS THWAITESII. 
(Westw. Trans. Ent. Soc. Lond. 1868, part iv. December. p. 327, nec 7’r. pulchellus Cresson. No. 14 infra.) 
Puate XXIII, Fie. 9. 
Minuta ; castanea, flavo et nigro variegata: alis limpidis, nubila fuscescente subapicali; antennis obscure 
falvis, 
Long. corp. lin. 34; expans. alar. lin. 6}. 
Habitat ; Insula Ceylon (Thwaites). In Mus. Hopeiano Oxonie (olim nostr.) 
Syy.: ZTrigonalys pulchella. 
Species perelegans ; caput castaneum, clypeo, orbitu oculorum, maculis tribus verticalibus lineolisque non- 
nullis posticis flavis; thorax castaneus ; marginibus superis collaris, maculis duabus conicis anticis mesonoti, 
alteris duabus ad latera scutelli, post-scutelli linea tenui transversa, maculisque duabus magnis posticis metanoti, 
flavis ; abdomen segmentis dorsalibus basi nigris, apice castaneis, primo et secundo macula magna communi 
ovata, hujus etiam margine lato postico, flavis; segmentis apicalibus flavis, linea longitudinali media castanea ; 
segmentis ventralibus inermibus. 
Species 6—TRIGONALYS MARGINATA. (Smith M8.) 
PiatE XXIII, Fie. 10. 
Nigra, metanoto piceo, punctatissima: thorace punctis majoribus et magis rugoso, necnon paullo nitido ; 
capite depresso subnitido, vix punctato, abdomine opaco subtilissime granulato; antennis nigris; tibiis et tarsis 
magis piceis; alis hyalinis, omnium margine costali nigricanti, colore nigro cellulam marginalem et cellulam 
primam submarginalem occupante ; petiolo abdominis subtrigono, supra canaliculato. 
Long. corp. lin. 5; expans. alar. antic, lin. 93. 
Habitat ; Venezuela. In Mus. Britann. 
The broad dark fore margin of the wings and the sulcated peduncle of the abdomen distinguish this species. 
The first large submarginal cell receives the first recurrent vein nearly at its extremity; the second submar- 
ginal cell is transversely trigonate, the second recurrent vein being continuous with the vein between the second 
and third submarginal cells, There is a deep transverse notch in the middle of the ventral surface of the 
abdomen. 
