468 STAPHYLINIDA. 
deeply and coarsely rugosely punctate, but the punctuation on the narrowed portion is 
obsolete, so that the surface there is shining. ‘Thorax slender, a good deal narrowed 
from the middle towards the front, and very slightly towards the base; the surface 
very shining, very finely punctate, and with a broad impunctate space along the middle. 
Elytra as long as the thorax, only minutely punctate, but with an erect black hair 
arising from each puncture. 
The sex of the unique individual is uncertain. 
STERCULIA. 
Sterculia, Laporte, Etudes Ent. p. 118; Erichson, Gen. et Spec. p. 301. 
This is another Tropical American genus of large and brilliant Staphylinide ; I have 
already excluded from it Agrodes, which was improperly sunk by Erichson, and I propose 
also to further limit it by the establishment of Plochionocerus for 8. formicaria and its 
allies. With these reductions the genus will still consist of about fifteen species, found 
in various parts of Tropical America. 
Mr. Champion captured most of the specimens he met with flying over dead leaves 
in the sunny openings in the forests. 
1. Sterculia fulgens. 
Areocnemus fulgens, Nordm. Symb. p. 164’. 
Sterculia fulgens, Er. Gen. et Spec. p. 303 °. 
? Staphylinus fulgens, Fabr. Ent. Syst. i. pt. 2, p. 522°. 
Hab. Mrxico!? (Flohr, Guérin-Meneville), Cordova (Sallé), Jalapa (Hége).—? Soutu 
America, Cayenne °. 
The nine examples before me vary slightly in colour and in the length of the 
mandibles, the differences in this latter respect bemg probably sexual. It is very 
doubtful whether this be really the Fabrician species, the only evidence to that effect 
being Erichson’s belief that the insect he described? agreed with the description given 
by Fabricius ®. I doubt extremely whether our Mexican species will be found to occur 
in Cayenne; and if not, it will be necessary to give it a fresh name, a course which need 
not be adopted, however, till the evidence is more complete. 
2. Sterculia mandibularis. 
Cyaneo-purpurea, nitida ; thorace quam elytra paulo breviore ; capite oblongo-elliptico, minus angusto, densissime 
minus grosse punctato, subtus disperse minus grosse punctato ; mandibulis elongatis, capitis longitudine. 
Long. 22 millim. 
Hab. Mexico, Jalapa (Hége); Nicaragua, Chontales (Janson). 
Antenne moderately long, penultimate joint strongly transverse, not in the least 
longer than the one preceding it; terminal joint rather short. Head very densely and 
