310 HYMENOPTERA. 



MESOCHOKUS. 



Mesochorus, Gravenhorst, Ichn. Europ. ii. p. 960 (1829) . 



1. Dffesochorus totanacus. 



Mesochorus totanacus, Cresson, Proc. Acad. Phil. 1873, p. 388 ( $ ) \ 

 Hab. Mexico, Orizaba (Sumichrast l ). 



PRISTOMERUS. 



Pristomerus, Curtis, Brit. Ent. p. 624 (1836). 



l. Pristomerus mexicanus. 



Pristomerus mexicanus, Cresson, Proc. Acad. Phil. 1873, p. 388 ((J) 1 . 

 Hab. Mexico, Mirador (Dr. Sartorius 1 ). 



EXETASTES. 



Exetastes, Gravenhorst, Ichn. Europ. iii. p. 395 (1829). 



1. Exetastes vittatipes. 



Exetastes vittatipes, Cresson, Proc. Acad. Phil. 1873, p. 389 ( ? )\ 

 Hab. Mexico, Cordova (Sumichrast x ). 



2. Exetastes tarsalis. 



Exetastes tarsalis, Cresson, Proc. Acad. Phil. 1873, p. 389 (6 $)\ 

 Hab. Mexico, Cordova (Sumichrast x ). 



3. Exetastes mexicanus. 



Exetastes mexicanus, Cresson, Proc. Acad. Phil. 1873, p. 389 ( d ) \ 

 Hab. Mexico, Mirador (Br. Sartorius *). 



SCOLOBATES. 



Scolobates, Gravenhorst, Ichn. Europ. iii. p. 357 (1829). 



l. Scolobates (?) varicornis. (Tab. xii. fig. 5.) 



Niger; capite, antennis, mesonoto antice, pedibus anterioribus tarsisque postieis, fulvis; alis fuscis, fascia 



medio fere hyalina. $ . 

 Long. 10-11 millim. 



Hab. Guatemala, San Geronimo (Champion). 



Antennae stout, longer than the body ; microscopically pilose ; fulvous, inclining to 

 yellow beyond the middle, the apical eight joints black ; the third joint nearly as long 

 as the two succeeding united. Head shining, impunctate, and nearly glabrous on the 

 top; the face projecting, but not largely nor sharply above, bearing shallow punc- 



