DYNASTIN/E 211 



Body oblong-oval, the elytra relatively less broad, never more than a 

 fourth or fifth wider than the prothorax 3 



2 Outline but slightly pyriform, moderately shining, dark castaneous 

 throughout; head notably small, barely more than a fourth as wide 

 as the prothorax, finely, closely punctate, the tubercle rather strongly 

 elevated and acute, otherwise as in pyriformis, the clypeus almost 

 similar but apparently with the apical carina much less rapidly 

 reflexed and thicker, entirely worn down in the type; prothorax 

 shorter, three-fifths wider than long, widest near basal third or 

 fourth, the sides thence converging and arcuate to the apex and 

 converging to the basal angles, which are broadly obtuse but scarcely 

 at all rounded; sculpture throughout very nearly as in pyriformis; 

 scutellum similar but more deeply impressed along the median line 

 basally; elytra almost similar in form though scarcely a third wider 

 than the prothorax and much more than twice as long, the punctures 

 similarly rather large and well separated, very shallow, umbilicate 

 and abruptly defined, the subsimilar regular series barely at all 

 impressed; pygidium similar but with the lower marginal bead less 

 broad, likewise separated from the disk by a fine groove; last ventral 

 rather more strongly arcuate medially but finely, rather closely 

 punctate, with smooth hind margin. Length (9) 15.0 mm.; 

 width 9.0 mm. Colorado (the locality unrecorded) . . debiliceps n. sp. 



Outline more strongly pyriform; body much larger in size, very 

 convex, shining, dark castaneous, a litle paler rufous beneath; head 

 less than a third as wide as the prothorax, black, finely, densely 

 punctate and with fine transverse wavy rugae throughout, the tubercle 

 in the form of a low rounded ridge, posteriorly arcuate from a dorsal 

 viewpoint, becoming obsolete at lateral fourth; clypeus trapezoidal, 

 nearly flat, almost three-fourths wider than long, the apical carina 

 thin, strongly elevated and rather posteriorly arcuate from a vertical 

 viewpoint; line of punctures along the outer side of the middle joint 

 of the antennal club fine and widely separated; prothorax widest 

 near basal third, the sides almost evenly arcuate, rather more so 

 basally, more converging and less arcuate anteriorly, the basal 

 angles broadly rounding into the sides; punctures anteriorly rather 

 fine, deep and dense from side to side, gradually becoming well 

 separated, coarse, shallow and umbilicate posteriorly, except toward 

 the middle, where they are even smaller than apically but shallower, 

 wanting along the median line in about basal half; scutellum per- 

 fectly smooth, not impressed basally; elytra large, oval, slightly 

 elongate, the sides arcuate, the apex evenly rounded, two-fifths 

 wider than the prothorax and evidently more than twice as long; 

 punctures disposed nearly as in the preceding species, rather large 

 but very shallow, the series rather distinctly impressed and the 

 punctures externally rather closer and more confused, smaller on the 

 apical declivity; pygidium finely, densely rugulose, not becoming 

 entirely smooth even at the middle apically, the lower beading rather 

 thick and convex. Length ( 9 ) 16.5-18.6 mm. ; width 10.0-1 1.7 mm. 

 New Mexico (Las Vegas and Fort Wingate). Three examples. 

 [Bothynus pyriformis Lee.] pyriformis Lee. 



