0DYNE11US. 280 



104. ©. MaiMUMS Sauss. — Niger, nitidus, dense pnnctatus ; metathorace 

 inermi, rotundato; abdornine ovato-coiiico; antice truncate, sessili ; 

 corpore sulfureo-multipicto; abdominis segmentis 1-5 sulfureo-limbatis, 

 lo et 2° insuper utrinque fascia trigonali sulfurea (vel fascia autica ^C° 



interrupta) ; pedibus ilavis ; alis subhyalinis. — 9- Clypeo et orbiti3 ^>^1 



partim Ilavis. CA~ 



Odyn. blanclus Sauss. Revue et Mag. de Zool. XXII,1870, 105, 27, 9 . 



Total lengtb, 9 mm. ; wing, 7 mm. 



9. Clypeus pyriform, flattened, rather strigose, truncate at tip 

 and rather rounded. Head and thorax densely punctate ; post- 

 scutcl quite shortly truncate, quite linear, transverse, but rounded, 

 not crested ; its hinder face rather oblique, punctured ; this form 

 being the transition to the Stenodynerus. Metathorax small, 

 short, and rounded, not angulate, shallowly punctured; its 

 excavation strigose, not sharply margined, except superiorly, 

 where it forms a little ridge or tooth behind the post-scutel. 

 Abdomen ovate-conical ; the first segment not quite as wide as 

 the second, scarcely truncate anteriorly, but without a sharp ridge, 

 sessile ; its superior face slightly depressed, as punctate as the 

 thorax ; 2d segment densely punctate, but not quite as strongly, 

 its hinder margin more strongly so, and densely punctured, 

 slightly and widely depressed ; the following punctured. 



Black, shining; a line on the mandibles, clypeus, inner orbits, 

 frontal spot, a line behind the eyes, the scape beneath, a wide, 

 but interrupted anterior margin of prothorax, a spot under the 

 wing, tegulae, a dot on mesothorax before the scutel, post-scutel 

 above, and sides of metathorax, sulphur-yellow. All the segments 

 of the abdomen margined with sulphur-yellow. The first, in addi- 

 tion, with two oblique yellow bands or maculae, fused with the yel- 

 low bordering laterally ; the 2d adorned on each side with a large 

 triangular macula, forming a wide interrupted fascia beneath; 

 this segment has similar yellow ornaments. Anus black. Feet 

 yellow; coxae black; the 2d and 3d pair margined with yellow 

 and spotted at tip. Wings subhyaline, nerves brown. 



Var. 9. Clypeus with a central black spot. 



Bess. a. diff. — In its rather stubbed form it recalls the form 



Of 0. Cutskillensis } but its abdomen is still more sessile, more 



truncate anteriorly, and more square. By its rich livery it recalls 



0. sul/ureus, but is very distinct from it by its non-angulaie 



19 



