3GG HYMENOrTERA OF AMERICA. [PART I. 



punctured, the first and second segments with a broad yellow 

 margin, which is continued beneath; the second segment produced 

 in the middle, forming a sharp angle or tooth ; the following 

 segments very narrowly bordered with yellow ; the first segment 

 eutirely pale beneath. 



Hab. Panama 



This species is very likely to be classed in Division Steno- 

 dynerus. 



2. Species dubia. 



The following species I first thought by its facies to be a North 

 American one, but as it never occurred to me in any American 

 collection, I must deduce from this fact that it did not originate 

 on this continent. 



It would find its place in the Division Odynerus. 



O. Tisip!l©ne Lep. — Oninino niger, sat gracilis ; clypeo vix emargi- 

 nato, carinato-subdentato ; inetanoti marginibus superne paulum ele- 

 vatis, acutis ; post-scutello flavo ; abdominis prime- segmeuto anguste, 

 seenndo teuuissime sulfureo-limbatis ; alis nigro-violaceis. J . — Long. 

 15 mm. 



Odynerus Tisiphone Lep. St. Farg., Hymen. II, 646, 31, £ (1841).— 

 Sacss. Vespides, I, 183, 77. 



Hab ? (America?) 



Gen. LEFTOCHILUS Sauss. 

 LeptocMlus* Sauss. Etud. Vespid., I, 233, III, 320. 



Appearance of genus Odynerus (Stenodynerus), but the abdo- 

 men is subpedunculate ; its first segment more or less funnel- 

 shaped. 



Labial palpi very slender. Maxillary palpi slender. 



This genus should evidently be united with the genus Odynerus, 

 and will most likely find its place in the Stenodyneri, next to the 

 group of huastecus. Unfortunately, not possessing the types, 

 I cannot exactly decide how the species should be placed. 



The abdomen is constricted between the 1st and 2d segments, 

 more than in the Stenodynerus ; nevertheless, this is only a 

 provisional genus which cannot well be preserved. 



1 *e7TTo'?, thin ; ^ii'Asf, lip. 



