324 Trans. Acad. Sci. of St. Louis. 



sides evidently diverging from tlie iiumeri, which are distinctly ex- 

 posed at base; abdomen parallel with feebly arcuate sides, at the 

 middle obviously wider than the elytra, the tergites subequal in 

 length throughout, the first rather broadly and feebly impressed at 

 base; sides and apex sparsely bristling with long black setae. Lengtii 

 1.25 mm.; width 0.42 mm. Florida seticornls n. sp. 



No sexual marks can be discovered in the unique type. In 

 this genus the coriaceous hind margin of the fifth tergite is 

 excessively fine, all but extinct, in marked contrast to its 

 unusual development in Chlorotusa. 



Chlorotnsa n. gen. 



This remarkable genus is evidently allied to Myrmedonia, 

 and yet has many structural features extremely like those of 

 JPhanerota, of the Gyrophaenae. The middle coxae are 

 very widely separated, the mesosternum entering scarcely at 

 all between them and broadly truncate, separated from the very 

 long and broad metasternal projection by a short and appar- 

 ently wholly unimpressed isthmus. The legs are very long 

 and slender, the tarsi long and filiform, with the basal joint 

 of the anterior and middle much shorter, that of the posterior 

 longer, than the second. The eyes are very large, prominent 

 and coarsely faceted. The neck is less than half as wide as 

 the head. Other characters may be drawn from the follow- 

 ing description of the unique type : — 



Stout, fusiform, rather convex, highly polished, without trace of micro - 

 reticulation, the punctures extremely minute and sparse, asperate on 

 the elytra, wholly wanting on the abdomen, which has some setigerous 

 punctures along the apices of the tergites, these punctures becoming 

 strongly asperate posteriorly; pubescence sparse, inconspicuous; color 

 pale rufo-testaceous throughout the body, legs and antennae, the head 

 deep black, arcuato-truncate at base, wider than long, with the eyes 

 very large and convex, occupying virtually the entire sides and sepa- 

 rated by twice their own width, the facets very coarse, convex, the 

 tempora extremely short; antennae very long, extending well behind the 

 elytra, gradually and moderately incrassate distally, setose, the sub- 

 apical joints longer than wide, the eleventh abruptly and obtusely 

 pointed, much shorter than the two preceding combined, second and 

 third equal in length, much shorter than the first; prothorax equal In 

 width to the head, not quite a third wider than long, widest near the 

 apex, the sides thence distinctly converging and nearly straight to the 



