ZETHUS. 53 



Observation. — In the figure the petiole is not quite suddenly enough 

 enlarged, and the profile of the pedicle of the second segment is a little 

 too short, as also in the linear part of the petiole. 



47. Z. tubuliffer Sadss. Vespides, I, 18, 19, 9-— Niger; clypeo 

 rotundato; autennaruui scapo subtus ferrugineo-notato ; pronoto angu- 

 lato ; punctis 2 frontalibus, pronoti margine, tegulis partim, maculis 2 

 scutelli, fascia interrupta post-scutelli, maculis 2 metanoti, margine 

 lineolaque lateral! ntrinque petioli apicis, segmentorum margine puuc- 

 tisque coxarum, flavis ; pedibus liavo-variis ; alis fumosis. Lougit, 

 0.017-18. 



Hob. Mexico. Oriental Cordillera. 



4§. Z. Zendallts n. sp. — Niger, pnnctulatus, capite et thorace 

 griseo-sericante ; metanoto tenuissime .strigato; pronoti fascia, macula 

 subalari, maculis 2 scutelli, 2 metauoti, petioli apicis lineolis 2 laterali- 

 bus, et lineolis 2 lateralibus 2' segmenti basis, citrinis; segmentis reli- 

 quis late rufo-marginatis ; ano rufo. 9 



9 . Total length, 14 mm. ; wing, 10-11 mm. 



Head and thorax densely and delicately punctured. A little 

 compressed brilliant point between the antennae. Prothorax 

 margined, but not angulated. Metathorax velutinous, very 

 delicately strigate, divided by a channel. Petiole ovate, narrow, 

 very delicately punctured like the abdomen, destitute of an im- 

 pression at the end. Peduncle of the 2d segment rather long. 



Black, with grayish hair; the margin of prothorax, a spot 

 under the wing, two on the scutel, two elongate maculae on the 

 metathorax, and a sinuous lateral line on each side of the extremity 

 of the petiole, a line on each side of the peduncle of the 2d seg- 

 ment, and two dots at its base, lemon-yellow ; a broad fascia on 

 the margin of segments 2d-5th, and the 6th segment, orange- 

 yellow or rufous. The apex of the petiole has no yellow margin 

 and no groove, but the base of the peduncle of the second seg- 

 ments has two yellow dots, which can be easily taken hy error 

 for a yellow marking of the apex of the petiole. Feet black. 

 Wings smoky with a golden reflection, the nerves black. 



9. Clypeus rounded, densely punctate, black like the antennae 

 and mandibles. 



Bess. a. cliff. — Distinct from Matzicatzin by its moderate head, 

 absence of impression at the end of petiole, and absence of 



