ZETIIUS. 23 



fine subrnarginal sulphur-yellow line on the 2d segment. The 

 antennae quite black. 



% . Clypeus flattened, only delicately punctate-strigate, a little 

 trilobed in the middle of its inferior margin; metathorax not so 

 much hollowed posteriorly ; a little strigate on sides ; the exca- 

 vation not margined at top ; the lateral carinas very sharp and 

 prolonged nearly down to the end, not obsolete beyond the angle ; 

 the lateral faces polished. The swelling of the petiole not so 

 oval, but more attenuated posteriorly ; the second segment more 

 pediculate, so that it might be almost classed in the Division 

 Didymogastra. 



The body is not clothed with golden silky hair, but only with 

 a little grayish pubescence on the metathorax and abdomen ; the 

 face or clypeus not silvery as in Z. aztecus. 



%. Antennae black; all the joints of the flagelluin annulated 

 beneath at their base with pale-yellow; the first joint having its 

 macula near the end ; the scape black. Clypeus broad, quad- 

 rangular, transverse, whitish-yellow, not silvery; its inferior edge 

 black, widely emarginate, with 2 distant teeth. The intermediate 

 tibiae ornamented before with a white line, running over the first 

 joint of the tarsi. 



Hab. Mexico, the eastern Cordillera. Orizaba (Mr. Sumi- 

 chrast). 



This species has the appearance of Z. Jurinei, because of its 

 oval petiole being posteriorly attenuated, and its black shining 

 color, but it is smaller ; its petiole is not impunctate, polished, 

 etc. 



b. Swelling of the petiole cylindrical. 

 * Metathorax not excavated. 



13. Z. Meydeili n. sp. — Niger, punctatus, tomento aureo ubiqne ves- 

 titus ; pronoto cristato-marginato, sed angulis baud spinosis ; petioli 

 tumoro cylindrico, subdepresso ; corpore maxime flavo-variegato ; 

 abdominis segmentis omnibus tenuiter flavo-limbatia ; pedibus flavis, 

 femoribus nigro-variis ; alis pelluoidis, venis ferrugineis. 



£. Mandibulis et clypeo flavis ; boc in medio margine producto-truncato ; 

 antennis fulvis sub soap*) fascia flava, apioe ooohleatis. 

 Total length, 1G mm. ; wing, 11 mm. 



9. Insect slender. Head wider than high, densely cribrose. 



Thorax densely cribrose ; prolhorax strongly Hanged, but the 



