298 HYMENOPTERA OF AMERICA. [PART I. 



leflexo; macula frontali et subalari, tegulis, maculis 2 scutelli et 2 

 metanoti, pronofci abdoroinisque segmentorum l'-4' margine, tibiis et 

 tarsis, pallide-flavis. — % . Clypeo polygonali navo ; scapp subtus flavo. 



Odyn. cluniculus Sauss. Revue et Mag. de Zool. XXII, 1870, GO, 18, £. 



% . Total lengtb, 9 mm. ; wiug, 7.5 mm. 



Body cribrose, with very large, cheep punctures; head rugose, 

 sharply margined behind. Prothorax anteriorly crested, ungu- 

 late. Post-scutel bearing a sort of emarginate crest or two 

 bidentate eminences; its hinder face elevated, flattened; meta- 

 thorax vertically truncate, much excavated, rather polished, very 

 sharply margined superiorly by two angulate prominent ridges, 

 separated by a sort of channel, being the continuation of the 

 ground of the cavity; the superior cheeks rather separated from 

 post-scutel by a sulcosity, and having a polished space; the 

 inferior part rather angulate inferiorly, but the angles quite 

 rounded; the inferior edges nearly horizontal. 'Abdomen quite 

 deformed. First segment short, truncate anteriorly ; its trans- 

 verse edge blunt, although a little salient because of a depression 

 of the superior face. Second segment slightly ovate ; quite 

 swelled above into two large, salient, rounded tubercles, sepa- 

 rated by a deep excavation, resembling two brushes; the margin 

 forming a rather broad, extremely deep channel, with the poste- 

 rior edge reflexed into a very much elevated crest, slightly 

 undulating in the middle. Third segment cut a little concavely 

 behind. The first three segments quite as strongly cribrose with 

 enormous punctures as the thorax (also the tubercles of the 2d 

 segment). Those following not as strongly punctured. 



Black. A frontal and post-ocular spot, anterior margin of 

 prothorax, a macula under the wing, tegulae, two spots on the 

 scutel, two spots on the metathorax and its blunt angles, and the 

 margins of the first four abd. segments, pale yellow; margins et' 

 1, 2 segments moderate; 8, 4 very narrow. Feet black or brown ; 

 knees, tibiae, tarsi, and eoxce 2, 3, pale yellow; tibiae rather ferru- 

 ginous. Wings subliyaline, anterior margin narrowly brown. 



V Clypeus polygonal, as wide as long, coarsely punctured, 

 truncate, pale-yellowy as well as a line on the scape of the 

 antenna;; hook ferruginous. — 9 ?. 



Bess. a. diff. — A species quite distinct by the unusual form of 



