DYNASTIN.E 265 



acters or sculpture, is shorter and very much more transverse than 

 in that sex and in this group the last ventral segment of the female 

 is distinctly longer than the penultimate. Organs of stridulation 

 are said to be present on the under surface of the elytra near the 

 sides; the propygidium has merely close-set fine punctures. Our 

 species are moderately numerous, there being several of the South 

 American valgus type, though none quite identical with that 

 species; those in my collection may be described as follows: 



Head with two long diverging processes in both sexes 2 



Head with two small and less widely separated tubercles in both sexes. .3 

 2 Processes of the head widely diverging. Body very stout, oblong, 

 moderately convex, shining, black, the under surface piceous; head 

 two-fifths as wide as the prothorax, nearly as long as wi'de, triangular, 

 deeply concave and smooth basally, the processes not as long as the 

 head and shorter in degradational examples, slightly arcuate, con- 

 cave on their posterior surfaces, never thickened and abruptly 

 reflexed at apex or but very slightly; clypeal apex extremely acute 

 and strongly bent upward; prothorax barely three-fifths (/3 1 ), to 

 nearly three-fourths (9) wider than long, rounded evenly at the 

 sides and widest at the middle, slightly concave and abruptly sloping 

 in apical two-fifths, this surface gradually disappearing antero- 

 laterad; surface behind the declivity with a broad shallow sulcus 

 ending slightly down the anterior slope at a strong tubercle, all the 

 impressed parts with coarse, sparse and shallow arcuate punctures, 

 each enclosing a minute point; remainder finely, sparsely punctured, 

 coarsely toward the sides; base without .marginal bead except 

 toward the sides; scutellum moderate, obtusely ogival, having a few 

 shallow punctures basally; elytra about a fifth longer than wide, 

 parallel, as wide as the prothorax and about twice as long, evenly 

 rounded in posterior two-fifths, having very coarse, moderately 

 impressed striae, enclosing smaller entire annuli, the intervals wide, 

 subequal, moderately convex, the second much broader basally, 

 where there are a number of coarse punctures rather confusedly 

 arranged; pygidium (d 71 ) very smooth, evenly convex, or ( 9 ) much 

 shorter and less convex, smooth, with similar very minute sparse 

 punctulation but more impressed apically along the oblique sides; 

 anterior tibiae purely tridentate, the teeth long, acute and oblique; 

 hind tibiae with two external spines; abdomen smooth and broadly 

 impunctate medially, having transverse single discal punctured 

 series bearing short setae laterally on each segment. Length (c? 9 ) 

 26.0-38.0 mm.; width 13.0-18.5 mm. Southern States. [Scara- 



bffits truncatus Beauv.] truncatus Beauv. 



Processes of the head similarly widely distant at base but thicker, only 

 slightly diverging, their apices abruptly flexed posteriorly, with the 

 posteriorly directed tip acute; form, color and lustre nearly as in the 

 preceding; head relatively not quite so large but otherwise similar, the 

 deep smooth basal concavity prolonged along the posterior surface 



