SCARAB BEETLE GENUS PSAMMODIUS — CARTWRIGHT 451 



sides crenate and fimbriate with moderately long simple setae, sur- 

 face evenly convex, without furrows except for a short, shallow depres- 

 sion inward from each anterior angle, evenly, quite densely punctate, 

 the moderate punctures separated by one or two diameters and 

 slightly smaller anteriorly and at sides. Elytra margined at base, 

 nearly parallel sided, width 2 mm., length 2.5 mm., not fimbriate; 

 striae deep, punctures moderate, slightly crenating sides of the smooth, 

 flat intervals, ninth and tenth intervals slightly convex, otherwise as 

 on disc. Metasternum smooth at middle, median line deep, abruptly 

 terminated at each end, anterior postcoxal line absent, a few close, 

 shallow, very coarse, alutaceous punctures at extreme sides. Ab- 

 dominal segments smooth at middle, finely crenate along anterior 

 margin, the crenate area wider along median anterior edge of ter- 

 minal segment. Pygidium scabrous over apical thh*d except for 

 smooth apex. Anterior femur with fine, indistinct anterior groove, 

 posterior face smooth, three or four setae along posterior margin. 

 Posterior femur one-third wider than middle femur, both with a sub- 

 marginal row of setae along posterior edge and at knee, a few setae 

 along anterior edge, posterior marginal line very short, only a trace 

 at knee. Posterior tibia without oblique ridges, apex about two- 

 fifths as wide as length of outside edge of tibia, spurs heavy, blunt, 

 the longer about equal to first tarsal joint in length. Length 3.75 

 mm., width 2 mm. 



Type: Schmidt collection, Naturhistoriska Riksmuseum, Stockholm. 



Type locality: Blumenau, Santa Catarina, Brazil. 



Specimens examined: Holotype only. 



Remarks: The complete lack of basal marginal line on the pro- 

 notum will help in identifying this species. 



Psammodius bidens Horn 



Psammodius bidens Horn, Trans. Amer. Ent. Soc. vol. 3, p. 293, 1871, and vol. 14, 

 p. 92, 1887.— Chapin, Proc. U. S. Nat. Mus., vol. 89, p. 9, 1940. 



Psammobius cruentus Schmidt (not Harold, 1867), Coleoptera, Aphodiinae. Das 

 Tierreich (Deutsche Zool. Ges.), pt. 45, p. 478, 1922. 



Oblong, shining, dark castaneous. Antemiae testaceous. Head 

 convex, moderately coarsely verrucose; occiput smooth, sparsely, 

 minutely punctate. Clypeus finely margined, widely, moderately 

 deeply, arcuately emarginate, a strong acute tooth each side of the 

 emargination, sides arcuate to the moderate, rounded genae, genae 

 not fimbriate. Pronotum convex, width 1.5 mm., length 1.1 mm., 

 sides and base crenate, fimbriate with very moderate, simple, hairlike 

 setae, crenations finer, fimbriae shorter across the base, which is finely 

 margined, slightly fimbriate and weakly lobed at middle; anterior 

 angles obtusely rounded; posterior angles evident but very broadly 

 rounded ; surface polished, with very fine, sparse punctures throughout, 

 a wide, curving band of moderately coarse punctures from anterior 



