44 H. C. FALL. 



times as wide as the sutural interval, the second about twice the width 

 of the first costa; all the narrow intervals with a more or less regular 

 row of very fine punctures, those of the sutural interval more numerous 

 and confused. Body beneath sparsely punctured at middle, more 

 closely at sides. Hind thighs rather stout, subimpunctate between 

 the submarginal lines of punctures. Upper tooth of front tibia very 

 nearly median in position. Ungual tooth slightly post-median, ob- 

 liquely truncate, its tip three-quarters as far from the apex as from 

 the base of the claw. Length 9^-12J mm.; width 5.2-6.5 mm. 



With the exception of a single example from Utah in the 

 National Museum collection, all specimens of the typical form 

 of this species are from Texas. Of these, the greater number 

 were collected by Belfrage. There is a series in Mr. Schaeffer's 

 collection from Burnett Co., but none of the others has 

 exact locality indicated. For comparison with insignis and 

 atlantis see notes under those species. 



Var. sinuata n. var. — This name is proposed for what seems 

 to be a varietal form of this species, differing in its larger size 

 (13J mm.), and in having the sides of the prothorax a little 

 sinuate before the hind angles. It is represented by two 

 examples in the writer's collection, taken by Prof. Cockerell 

 at Pecos, New Mexico; and a single specimen nearly identical 

 from Beaver Creek Mills, Utah, in Mr. Schaeffer's collection. 



30. D. atlantis n. sp. 



Moderately stout, usually but little wider behind, black or very 

 nearly so when mature, shining, elytra minutely alutaceous, prothorax 

 polished, without or with merest trace of alutaceous sculpture. Men- 

 turn declivous in its anterior two-fifths, margin of declivity with a 

 series of about seven short setas, but without raised line. Clypeus 

 densely punctate, margin truncate and just perceptibly sinuate at 

 middle with rounded angles; front closely punctate, broadly bi-im- 

 pressed and with evident post-clypeal convexity; clypeal suture 

 sharply impressed, nearly straight, scarcely smoother. Prothorax 

 about three-fourths wider than long, widest at or very near the base, 

 sides broadly arcuate, subparallel basally; punctures separated by 

 about their own diameters at middle, closer at sides; angles not at all 

 impressed. Elytra nearly three times as long as the prothorax; costas 

 distinct, scarcely or but slightly more convex; intercostal spaces con- 

 fusedly punctured, the first rather less than three times the width of 

 the sutural interval. Metasternum coarsely closely punctate laterally, 

 very finely and sparsely so at middle. Ventral segments coarsely 

 punctate at sides, more sparsely and finely at middle. Pygidium with 

 a somewhat vaguely impressed longitudinal median line Upper tooth 



