SCARAB BEETLE GENUS PSAMMODIUS CARTWRIGHT 431 



July 13, 1937, Turner; 1, College Station, May 24, 1931, Reinhard; 2, 

 Brownwood, Oct. 5, 1905, Pierce. Mi&xico: San Luis Potosi: 

 42, Tamazunchale (Rt. 1, km. 365), May 30, 1948, Werner and 

 Nutting; 7, 11 km. east of Ciudad de Valles, May 29, 1948, Werner 

 and Nutting. Tamaulipas: 2, Nuevo Laredo, Nov. 24, 1905, Pratt. 

 Mexico: 1, Temascaltepec, July 1933, Hinton and Usinger. 1, 

 Cuernavaca. Vera Cruz: 1, San Rafael Jicaltepec, June 19, 1896, 

 Bowditch. Honduras: 3, 12 km. west of Olanchito, June 20, 

 July 5, 1949, at light, Becker. Paratypes will be placed in the 

 following collections: Naturhistoriska Riksmuseum, British Museum, 

 Canadian Department of Agriculture, California Academy of Sciences, 

 Texas A. and M. College, Museum of Comparative Zoology, Antonio 

 Martinez, and Mark Robinson. 



Remarks: Psammodius werneri is the largest of the group of 

 species closely related to P. interruptus Say, varying from 3 to 3.8 mm. 

 in length and from 1 .5 to 1 .8 mm. in width. It is usually smooth above 

 the eyes however; rarely it may have two or three very fine punctures 

 in this area. See remarks following Psammodius interruptus Say 

 (p. 429). 



Psammodius canoensis, new species 



Holotype oblong oval, shining, rufopiceous. Antennae rufotesta- 

 ceous. Head convex, closely, moderately verrucose; occiput smooth, 

 without punctiu-es above the eyes. Clypeus moderately deeply, 

 triangularly emarginate, the limiting angles each side rounded, sides 

 and angles finely reflexed, sides weakly arcuate, genae fimbriate, 

 broadly rounded, inconspicuous. Pronotum narrower in front, width 

 1.15 mm., length 0.85 mm., anterior angles rounded, approximately 

 right-angled, posterior angles broadly rounded, sides and base crenate, 

 fimbriate with rather close, very moderate, more or less pointed setae, 

 base finely margined; surface with moderately coarse punctures 

 arranged in four transverse furrows, the third slightly wider and pos- 

 teriorly merging triangularly with the similarly punctate median 

 longitudinal furrow, the latter deeper over basal half but extending to 

 the apical ridge or margin; five finely punctate, quite smooth, trans- 

 verse ridges, laterally the coarse punctures over the convexity beyond 

 the lateral fovea become elongate, arcuate, and more or less run 

 together, along the basal margin they leave the intervening surface 

 in one or two irregular rows of tubercles. Elytra as wide as pronotum 

 at base, width 1.4 mm., length 1.95 mm., base margined, humeri 

 dentate, sides weakly arcuate, not fimbriate; striae deep, strial punc- 

 tures fine, deep; intervals shining, smooth, wealdy, evenly convex, 

 inner margin irregularly, not deeply crenate, the crenations appearing 

 as very small triangular notches, outside margin very slightly irregular, 

 not distinctly crenate. Metasternum smooth, shining, depressed at 



