CHKISTOLIA. 24:9 



the lower one is interrupted in the middle; tubercles short, blunt. Petiole longish, 

 curved, smooth, shining ; an indistinct tubercle on either side of the postpetiole at the 

 base ; the remaining segments smooth, covered with microscopic down. Areolet quad- 

 rangular, the anterior nervure oblique ; there is no angle on the lower side. 



Apparently a variable species. The Mexican specimens have only the hind knees, 

 tibiae, and metatarsus black, and they have the petiole red. The Guatemalan examples 

 have the hind knees broadly, the middle knees slightly, the middle tibiae and the 

 tarsi entirely, black, and the fore femora, tibiae, and tarsi more or less black behind, 

 the hind legs being as in the Mexican form ; the petiole has only the extreme base 

 red. In the Guatemalan specimens there is a broad white or yellowish mark at 

 the apex of the postpetiole ; a small round mark at the apex of the second and third 

 segments ; a small triangular mark on the fourth, and a large triangular one on the fifth, 

 sixth, and seventh, the segments at their junctions being obscure reddish. The Mexican 

 specimens want the marks on the petiole and on the second and third segments. 



5. Christolia zapotecus. 



Christolia zapotecus, Cresson, Proc. Acad. Phil. 1873., p. 165 (<? ? )V 

 Eab. Mexico, Orizaba x (Sumichrast). 



6. Christolia mirabilis. 



Christolia mirabilis, Cresson, Proc. Acad. Phil. 1873, p. 165 ( g ? ) \ 

 Eab. Mexico, Orizaba x (Sumichrast). 



7. Christolia mirandus. 



Christolia mirandus, Cresson, Proc. Acad. Phil. 1873, p. 165 ( ? ) \ 

 Eab. Mexico, Orizaba 1 (Sumichrast). 



8. Christolia graciHventris. 



Niger ; annulo antennarum, facie, ore, orbitis, scutello, tegulis, linea pronoti, abdominis segmentis apiee tarsisque 

 posticis, albis ; sterno, pleuris, metanoto (basi excepta) pedibusque, fulvis ; tibiis posticis supra nigris ; alia 

 hyalinis, nervis nigris. $ . 



Long. 19 millim. ; terebra 8 millim. 



Eab. Mexico, Valladolid in Yucatan (Gaumer). 



Face punctured, the vertex aciculate in the centre ; tips of the mandibles black. 

 Mesonotum closely punctured, covered with close fuscous pubescence ; pleurae more 

 closely punctured (except in the centre), covered with a greyish-white pubescence. 

 Metanotum at the base shining and impunctate, in front of the transverse keel aciculate, 

 the rest transversely striated. Metathoracic tubercles scarcely indicated. Scutellum 

 much longer than broad, narrowed towards the apex ; the mesonotum on either side of 

 it obliquely striated. Petiole longish, clearly defined from the postpetiole, which is 



biol. CENTE.-AMEK., Hymenopt., February 1886. 2 kk 



