SCARAB BEETLE GENUS PSAMMODIUS — CARTWRIGHT 423 



Oblong oval, slightly broader behind, moderately shining, dark 

 castaneous. Antennae pale rufotestaceoiis. Head convex, closely, 

 coarsely verrucose, occiput with two deep grooves aiTanged in chevron 

 separated by an elevated ridge. Clypeus broadly, triangularly emargi- 

 nate, the angles each side rounded, sides weakly arcuate, a slight notch 

 at clypeal suture, genae small, rounded. Pronotum slightly narrower 

 in front, width 1.55 mm., length 1.0 mm., anterior angles very obtuse, 

 posterior angles widely rounded, base sinuate and slightly lobed at 

 middle, the marginal line distinct, sides and base fimbriate-crenate, 

 fimbriae simple; surface with four deep, transverse, closely, coarsely 

 punctate furrows and a trace of a fifth furrow along the base, the 

 intervals between and the smooth areas at the sides strongly convex, 

 shining, minutely, not closely punctate, the two basal ridges inter- 

 rupted by the deep, closely, coarsely punctate median line. Elytra 

 at base as wide as pronotun, width 1.8 mm., length 2.8 mm., sides 

 nearly straight, slightly divergent, the striae moderately deep, finely, 

 not closely punctate, punctures not distinctly crenating the slightly 

 convex, smooth intervals, the shortened tenth interval flat and aluta- 

 ceous, sides of elytra not noticeably fimbriate, base margined. Meta- 

 sternum smooth, shining, median line deep, without anterior post- 

 coxal line, smoothly rounded into the finel}^ scabrous depressed area 

 behind the middle coxae, a few very shallow, coarse, setigerous punc- 

 tures at extreme sides. Abdominal segments smooth, each with a row 

 of two or three setigerous punctures at sides, the terminal segment 

 widely, deeply eroded anteriorly. Pygidium terminally scabrous. 

 Anterior femur margined in front, posterior surface with scattered, 

 setigerous punctures. Middle femur with deep, complete, posterior 

 marginal line, numeious setigerous punctures anteriorly and over 

 outer two-thirds. Posterior femur twice as wide as middle femur, 

 posterior marginal line deep, entire, three or four setigerous punctures 

 along posterior margin, a few scattered over outer third. Posterior 

 tibia about three times as long as wide at apex, spurs narrowly foli- 

 aceous, bluntly rounded, the longer about equal in length to the first 

 three tarsal joints combined. First tarsal joint elongate triangular. 

 Length 3.3 to 4 mm., width 1.5 to 2.0 mm. 



Type: P. laevipennis: Location unknown to me, but probably in 

 Museo Zoologico della Universita di Napoli if still in existence. P. 

 aegialioides: Museum of Comparative Zoology, Cambridge, Mass. 



Type locality: P. laevipennis: Shores of Granatello, region of 

 Naples, Italy. P. aegialioides: "Middle States," i. e.. Middle Atlantic 

 States. 



Specimens examined: 95. 



Distribution: United States: Virginia: Arlington (Potomac 

 River). Maryland: Chesapeake Beach, Kenwood Beach. New York: 

 State label only. Indiana: Beverly Shores, Tremont, and Dunes State 

 Park. 



