DYNASTIN^E 267 



scutellum small, very obtusely ogival, not wider than long, having 

 some coarse punctures basally; elytra long, a third to two-fifths 

 longer than wide, rounded in apical third, very faintly inflated 

 posteriorly, a little wider than the prothorax and evidently more than 

 twice as long, having coarse, feebly impressed lines enclosing deep, 

 oval and somewhat umbilicate closed annuli, with minute sparse 

 punctules scattered over the regular and subequal intervals, the 

 second interval at base with two to four punctures; pygidium (cf) 

 rather transverse, strongly, subevenly convex, impressed near the 

 oblique lower sides and strongly, closely punctate throughout, or 

 (9 ) nearly similar but still shorter and more transverse, the coarse 

 punctures sparser than in the male; anterior tibiae with a fourth 

 feeble and obtuse tooth above the third; hind tibiae with a single 

 short oblique spine, the upper one obsolescent. Length (cf 9 ) 

 19.5-20.5 mm.; width 9.5-9.8 mm. Arizona (Nogales). Southern 

 California (Vallecitas, San Diego Co.), LeConte. . . .illatus Lee. 



Form very nearly as in illatus but slightly more abbreviated, very shining, 

 deep black throughout; head similar but with the tubercles rather 

 more elevated and acute and the sculpture somewhat less coarse; 

 prothorax shorter, three-fifths wider than long, similar in general 

 form but with the punctures less coarse and differing greatly in 

 character, being deep or almost perforate and not broadly crescentic 

 and umbilicate, as they are in Hiatus, the median impressed line 

 deeper, having coarser and shallower punctures than elsewhere; 

 punctures in basal two-thirds, except toward the sides, very fine and 

 remote; scutellum small, parabolic, smooth, with some coarse 

 punctures at base; elytra as wide as the prothorax, parallel, rounded 

 behind, much shorter than in illatus, being about a fourth longer than 

 wide, the sculpture nearly similar; propygidium with fine, very dense 

 punctures, arranged in close-set wavy transverse lines, the hairs 

 small and close, decumbent and rather fine; pygidium nearly as in 

 Hiatus but closely, more coarsely punctured; anterior tibia! teetli 

 long and very acute; hind tarsi shorter than in the preceding, two- 

 thirds as long as the tibiae. Length (cf ) 19.0 mm.: width 9.0 mm. 

 Arizona (Phoenix). One example phoenicis n. sp. 



Form very stout, just visibly inflated posteriorly, very shining, piceo- 

 castaneous, barely paler beneath; head relatively smaller, two-fifths 

 as wide as the prothorax, otherwise almost as in Hiatus, except that 

 the feebly concave sides of the clypeus have only a very few remote 

 minute punctures; prothorax very much more transverse and larger 

 in size, fully two-thirds wider than long, the outline somewhat similar, 

 the impression along the median line not at all definite, very broad 

 and shallow, broader and with a large cluster of very coarse punctures 

 before the middle, evanescent apically, where, near the apex in 

 certain angles of reflected light, there appears to be an excessively 

 feeble, narrowly bilobate tumidity, the surface at apex sloping 

 throughout more rapidly to the apical bead; punctures very coarse 

 and disposed nearly as in -Hiatus, but very much deeper and scarcely 

 variolate; scutellum nearly similar but with the basal punctures 

 very much deeper; elytra only about a fourth longer than wide, 



