16 Cincinnafi Society of Nafnral Ilisforij 



Xestocis quadridentahis, n. sp. 



Elongate, siiboval, shining. Piceo castaneous in color, with 

 pale legs. The male has the epistoma strongly quadridentate 

 and reflexed; front of head concave. Maxillary palpi, with 

 last joint large, oval and bluntly pointed. Antennae 10-jointed. 

 Third joint slender and longer than fourth. Fourth, fifth and 

 sixth decreasing in length and increasing in thickness. Three- 

 jointed club loose, with the terminal joint rather pointed. 

 Prothorax about as wide as long. Sides arcuate and margined 

 as is base. Apex produced into two triangular flat horns. 

 Punctures strong, deep, uniform and close set, as are those of 

 elytra, which are as wide as prothorax and one-half longer 

 than wide, bristling with pale pubescence, arranged without 

 order. A small, deep fovea at middle of first ventral segment. 

 Females are without the epistomal teeth and ventral fovea. 

 Length 1.50 to 2 mm. Twenty-two specimens. Framingham, 

 Mass. Mr. Chas. A. Frost. 



Xestocis castlei, n. sp. 



Suboval in form, rufopiceous in color. Moderately shining. 

 Horns, head and legs pale. Vestiture composed of rather 

 dense, short, stout, yellow bristles, not at all serial in arrange- 

 ment. Male. Head broad; eyes small. Front flat, with epis- 

 toma reflexed and produced each side into two widely separated 

 sharply pointed horns, which are curved upwards and carinate 

 beneath from their base to apex. Antennae 10-jointed. First 

 joint very thick, second slightly more than one-half as thick and 

 shorter. Third, fourth, fifth, sixth and seventh gradually 

 decreasing in length and much narrower than second. Seventh 

 very transverse. Three-jointed club about as long as the 

 preceding together and with the joints feebly subcjuadrate. 

 Prothorax as long as wide, sides arcuate and margined to 

 apical angles, which are not prominent. Base truncate and 

 finely margined. Apex produced into two prominent triangular 

 flat horns. Elytra slightly narrower at base than prothorax, 

 with sides visibly arcuate to the ogivally rounded apex, and less 

 than twice as long as wide. Suture very finely beaded. Punc- 



