124 A. MATTHEWS. 



Abdomen short, part of three segments exposed, apex deeply bifid, cov- 

 ered with very long golden hair. 

 Prosternum large, produced posteriorly into a very long and broad plate 



extending more than half over the metasternum, deeply bifid at its 



extremity. 

 Mesosternum strongly carinated. carina produced posteriorly into a 



broad spoon-shaped process covering the posterior coxse. 

 Metasternum very short, extending to the sides of the body. 

 Venter 6 segments, apical segment large, deeply bifid, and longitudinally 



sculptured. 

 Leos very sliort and compressed, tarsi very small, and the femora broadly 



laminated. 

 Posterior cox.-e moderately distinct, very small and linear, furnished 



posteriorly with an immense quadrate lamina. 



li. paradoxus^ Matthews Ann. Lye. Nat. Hist. New York, 8, p. 409, 1867. — 

 L. c. .87 — ^1 mm. — Conic, widest in front, very convex, shining, rufo-testaceous, 

 thickly covered with a sericeous silvery pubescence; head small, eyes wanting; 

 thorax very large and very convex, widest at the base, alutaceous; sides circularly 

 rounded, posterior very acute and slightly produced ; elytra connate, attenuated, 

 shorter and narrower than the head and thorax, widest at the shoulders, elegantly 

 and reticulately asperated, apex bi'oad, scarcely rounded; abdomen moderately 

 exserted, three segments exposed, thickly covered with long golden hair extending 

 beyond the apex of the abdomen, apical segment long, deeply bifid ; legs and an- 

 tenniB very short, rufo-testaceous. 

 United States. In ants' nests. 



9IYRMICOTRICHIS. 



Motschulsky Bull. Mosc. 41, p. 181, 1S6S. 



Body sub-ovate. 



Antenn/E 1 1-jointed. the three last joints moderately incrassate, form- 

 ing a moniliform club. 



Head rather deflexed. 



Pronotim much dilated at the base, with the hinder angles exceedingly 

 produced. 



Elytra truncate, rather long. 



Abdomen long and much exposed. 



Mesosternum large, much cariniited. 



Metasternum moderate, extending to the sides of tlie body. 



Venter 6 segments. 



Legs rather short, tibiae compressed. 



Posterior coX/E moderately distant, broadly laminated. 



