164 OrpER—HYMENOPTERA. 
Species 3—PRISTOCERA COLUMBANA. 
Pirate XXIX, Fic. 5. 
Nigra, nitida, levissima: capite rotundato minute punctato, clypeo prominulo, emarginato; mandibulis 
albidis, dentibus tribus apicalibus alteroque magno interno (fig. 5a); antennis gracilibus fere longitudine thoracis 
et abdominis, articulis 13, secundo minuto, reliquis, ad apicem sensim attenuatis, intus setosis; collari breyi 
semicirculari ; metanoto transverse quadrato, in medio longitudinaliter sulcato, striolisque basalibus abbreviatis, 
internis magis obliquis, lateribus metanoti longitudinaliter striatis; abdomine oblongo-ovato, segmentorum mar- 
ginibus piceis; pedibus nigris, tibiis apice tarsisque piceo-rufis ; alis fuscescentibus, venis stigmateque fuscis, 
cellula infero-discoidali completa. 
Long. corp. lin. 4; expans. alar. antic. lin. 6. 
Habitat ; Columbia (D. Gaudichaud). In Mus. W. W. Saunders. 
The wings are slightly longer than the antenne, which are nearly as long as the thorax and abdomen. The 
maxillary palpi are moderately long, the two basal joints short, the third longer and oblique at its extremity ; 
the mentum is cup-shaped, and the labial palpi are three-jointed, the last joint thickened at the tip (fig. 5 4). 
Species 4—PRISTOCERA CRASSICORNIS. 
Prate XXIX, Fie. 6. 
Nigra, punctata: abdomine nitidissimo levissime punctato; clypeo porrecto apice subbifido; mandibulis 
irregulariter dentatis, dentibus duobus apicalibus validis et interno crasso, brevi, truncato (fig. 64); antennis 
brevibus, articulis intermediis crassioribus, apicalibus sensim attenuatis (fig. 6 a); collare semi-ovato; metanoto 
spatio semi-ovali longitudinaliter striolato notato, postice in canalem abbreviatum dorsalem ad apicem metanoti 
extensum desinente ; lateribus metanoti oblique striolatis ; alis fusco-hyalinis venis stigmateque nigris; cellula 
postero-discoidali vix distincte formata; collaris, segmentorum abdominalium marginibus posticis, tegulisque 
piceis ; pedibus nigris, geniculis, tibiarum apicibus, tarsisque piceo-rufis. 
Long. corp. lin. 4; expans. alar. antic. lin. 6. 
Habitat ; Amazonia (Bates). In Mus. Hopeiano Oxonie et W. W. Saunders. 
The maxillary palpi are 6-jointed, the three basal joints short, the third but slightly larger than the second ; 
the three terminal joints are more elongated and slender, nearly equal; the mentum is narrow at the base, © 
dilated at the anterior extremity ; the labial palpi 3-jointed, with the joints equal. 
Species 5—PRISTOCERA DREWSENII. 
Puate XXXI, Fic. 7. 
Nigra: capite rotundato varioloso-punctato ; clypeo in medio in spinam parvam producto ; antennis graci- 
libus, filiformibus, articulo primo longiori, seeundo parvo, reliquis fere equalibus, ad apicem sensim paullo atten- 
uatis (fig. 74); mandibulis dentibus 4 apicalibus, dente externo et interno majoribus acutis conicis (fig. 7 @) ; 
maxillis lobis duobus membranaceis, palpis 6-articulatis, tribus basalibus crassioribus et sensim longioribus, tribus 
ultimis gracilioribus subequalibus ; mento angulis anticis lateraliter porrectis, margine antico valde setoso, palpis 
3-articulatis, articulis basi gracilibus, subzequalibus ; collare trigono, punctato, margine postico levi; mesotho- 
racis dorso postice rotundato, spatio trigono basali areolato, in medio subcanaliculato, carimam tenuem mediam 
includente ; abdomine depresso, nitidissimo; pedibus nigris; trochanteribus albis ; alis pallide lutescenti-hya- 
linis, venis gracilibus stigmateque nigris. (Mas.) 
Long. corp. lin. 5; expans. alar, antic. lin. 7. 
Habitat; Ceylon. In Mus. Hopeiano Oxonie. Mecum benevole communicavit Dom. Drewsen, Hymen- 
opterologus Danicus peritissimus et nomine ejus inscripta. 
