212 P. CAMERON. HYMENOPTERA. 



1. Xantliocryptus nigricollis sp. n. 



Bivak Island, February. 



Ferruginous, the antennae except the apex of the 7 th and the 8 th to 12'h clear white, 

 the head except a semilunate spot on the vertex touching the eyes and ocelli, which is white 

 and the prothorax and mesonotum to near the apex, the black on the middle lobe longer 

 than on the sides, black; the penultimate segment of the abdomen with a broad white band 

 on the base; legs coloured like the body, the anterior 4 trochanters and the tibiae behind 

 paler, more yellowish, the hinder tibiae infuscated, the tarsi black, the metatarsus white to 

 near the apex; basai half of mandibles and the space behind them yellow, tinged with rufous; 

 labrum white. Wings hyaline, tinged with ferruginous on the basai half, the apex with a 

 narrow smoky violaceous cloud, the costa and stigma testaceous, the nervures black, the 

 areolet small, square, the nervures faint, parallel, the récurrent nervure received near the apex, 

 the transverse médian distinctly before the transverse basai ; the transverse cubital nervure in 

 hind wings broken shortly below the middle; it is roundly curved. Tegulae, palpi and 

 tubercles white. 9- 



Length 12 m. m., terebra 5 m. m. 



Head smooth, the face sparsely and weakly, the clypeus more strongly and closely 

 punctured. Pro- and mesonotum smooth, the latter finely closely punctured along the furrows, 

 at the sides und apex. Parapsidal furrows narrow, but distinct, on basai two-thirds. Base of 

 metanotum to the keel closely, but not very strongly punctured, beyond it closely transversely 

 striated, the striae stronger on the apical than on the basai half; the basai keel complète, 

 roundly curved, the apical stronger, but on the outer part only, it being widely interrupted 

 in the middle. Abdomen smooth and shining. 



2. Xantliocryptus spilonotus sp. n. 



Bivak Island, January. 



Rufo-ferruginous, the antennae except joints 8 — 17*, which are white, the head, upper 

 half of the prothorax, the centre of the mesonotum to the end of the furrows and the latéral 

 lobés to the middle of the tegulae, black, the mandibles rufous except the teeth, the palpi, a 

 semilunate mark on the sides of the vertex, wider behind than in front, tegulae, a roundish 

 spot, a little wider than long, and with the base more transverse than the apex, on the 

 mesonotum, between the end of the furrows, tubercles, a narrow, not very distinct, line on 

 the apex of the ist abdominal segment, a wider one on the 2^, a line, wider than the parts 

 bordering it, on the centre of the yà and a much shorter one, in the middle of the 4A, 

 pallid yellow. Legs coloured like the body, the hinder tibiae with a white band as long as 

 the longer spur of the hind tibiae, at the base; the 4 hinder tarsi blackish, the basai half of 

 the metatarsus paler; the fore coxae and their trochanters pale yellow. Wings hyaline, the 

 stigma and nervures black, the areolet small, square, receiving the récurrent nervure at 

 the apex. cf. 



Length 14 m. m. 



Smooth, the apex of the mesonotum closely finely transversely striated, from shortly 

 before the apex of the middle lobe; the base of the metanotum finely closely longitudinally 



