ODYNERUS. 321 



of nietathorax small, rounded, with edges quite rounded as in O. 

 propinquus. The 2d segment is shorter, with its marginal zone 

 more coarsely punctured and the edge more reflexed. 



The livery is the same, but the prothorax has a waved sub- 

 marginal yellow or fulvous fascia ; no spot under the wing; tegulse 

 ferruginous. Segments 1-2 margined with yellow; 3 and 4 very 

 obsoletely tipped with fulvous ; the first segment adorned with 

 two very small lateral fulvous spots ; the 2d without such spots. 

 Feet ferruginous ; at base black. Wings smoky, rather iridescent. 



Clypeus ( % ) transverse, wider than long, yellow, terminated 

 by two long spines separated by a semicircular notch. Mandibles 

 ferruginous, partly yellow. 



Var. ? Two small spots on the 2d segment. 



Bess. a. cliff. — It has the same form of abdomen as in 0. Xan- 

 tianus, from which it differs by its 2d segment, more swelled, 

 bell-shaped, with a little reflexed edge. It is larger than O. 

 l^edestris, perennis, etc., and is especially distinguished by the 

 form of its clypeus, short and long-spined. 



Hab. New England. Connecticut (E. Norton). 



Observation. — We are in possession of a % specimen nearly 

 identical with the described type, having the first two segments 

 adorned with very small lateral spots (probably liable to be 

 wanting), but the clypeus is triangular, more elongate, terminated 

 by two long spines separated by a narrower deep notch. — Is it 

 another species ? (Xew York). 



** Only the second abdominal segment adorned vith two yellow f,pols which are often 

 wanting, principally in the malen. 



Observation.— As in the preceding species, the spots of first segment are 

 often wanting, and one must compare also the species of Section *. 



122. O. bacwensis Sauss. (Fig. 28, 28a.)— Niger, crasse-punctatus, 

 flavo-multipictus ; metanoto utrinque haud angulato, foveola crasse 

 punctata, superne infra scutellum canthis angulatis acutis terminata; 

 20 abd. segmentotenuiter punctato ; clypeo, antennis basi, capitis macu- 

 lis, pronoto antice, tegulis, macula subalari, post-scutello, metanoti 

 lateribus, tegulis, pedibus, abdominis segmentornin l 1 , 2', 4', 5 1 margine 

 et ano, flavis; 2° segmento insuper utrinque macula flava ; alis subfer- 

 rugineis apice nebulosis. 



Odyn. bacu. Sauss. Et. Vespid. I, 185, 80 (1852). — 0. bacuensis Sauss. 

 Ibid. Ill, 232.— Ckessox, Hymen, of Cuba, Proc. Ent. Soc, Pbilad. ; 

 IV, 1865, 64. 



Total length, 9 mm. ; wing, mm. 

 21 



