TRAVAUX INÉDITS. 55 



VespidjE american/e ivov.e NONNULLiEj auctore 

 H. de Saussure. 



Genus ODYNERUS, Latr. 

 Subgenus SYMMORPHUS, Wesm. 



1. 0. derilis. — $ Niger, punctatus, maxime elonga- 

 tus, gracillimus; postscutello et metanoto rugosis ; hoc 

 maxime pone postscutellum producto ; abdominis primo 

 segmento elongato, crasse punctato, sulco valde sejuncto ; 

 puncto frontali et postoculari, punctis2 scutelli, macula 

 subalari, abdominis segmentis 1, 2 fascia marginali, sul- 

 phurea, secunda interrupta ; tibiis basi sulphureis ; alis 

 hyalinis, tegulis fusco-nigris. — Long. 8-5 mill. — Ame* 

 rica borealis. 



2. 0. Walshianus. — Niger, punctatus, gracilis, post- 

 scutello et metanoto rugosis; mesonoto sparse, scutello 

 crassius, abd. primo segmento crasse, punctatis; puncto 

 frontali et postoculari, maculis 2 pronoti, 2 scutelli, et 

 utrinque 1 subalari, tegulis abdominisque segmentorum 

 1-4 limbo, flavis; tibiis et tarsis flavis ; alis fusco-nebu- 

 losis. — Ç Macula in summo clypeo flava. — Long. 12 mill. 

 — America borealis. 



Subgenus ANCISTROCERUS, Wesm. 



Divis. ANCiSTROCERUs,pr. dict. — Primi abd. segmenti facie 

 superna brevi, transversa. 



3. A. Clarazianus. — Niger, sericeus; capite rufo vel 

 obscuro ; capite et thorace superne rugose punctatis ; 

 pronoti angulis emarginatis, lobatis ; postscutello valde 

 cristato, emarginato; metathorace postice excavato, can- 

 this peracutis marginato, utrinque spina et infère dente 



