268 MEMOIRS ON THE COLEOPTERA 



more broadly rounded at apex, barely at all wider than the pro- 

 thorax and much more than twice as long, the very coarse even 

 and moderately impressed lines of deep elongate perforato-umbili- 

 cate annuli almost similar, except that there are still fewer punc- 

 tures on the second interval basally, there being in the type none on 

 the left and but two on the right; pygidium of the female through- 

 out nearly as in Hiatus, the tibiae nearly similar. Length (9) 

 22.8 mm.; width 11.5 mm. Southern Arizona (the locality unre- 

 corded) puncticollis n. sp. 



6 Pygidium (cT) with coarse deep and conspicuous punctures. Body 

 depressed, narrower than in valgus, similar in the deep black shining 

 surface and rather small head, the latter broadly concave and with 

 coarse distant anastomosing incised rugulosity, the lines usually 

 attended by minute punctures; tubercles nearly at the extreme sides; 

 acute apical tubercle almost vertically elevated and with two feeble 

 elevated lines diverging posteriorly from its base, bending outwardly 

 and becoming more obtuse to the posterior tubercles; oblique sides 

 of the clypeus moderately elevated; anterior eye-canthus fully as 

 prominent as the eye, rather narrowly rounded and somewhat re- 

 flexed; antennal club rather small, twice as long as thick; prothorax 

 one-half to three-fifths wider than long, parallel and rounded at the 

 sides, the median sulcus deep, coarsely punctate, evanescent and 

 nearly punctureless basally, distinct along the feeble transverse 

 anterior impression to the base of the rather strong tubercle; surface 

 strongly, closely punctate, the punctures coarse, crescentic and sub- 

 confluent apically, fine and sparse thence to the base but coarser 

 gradually, though simple, toward the sides; scutellum small, with 

 some coarse punctures basally; elytra a fourth longer than wide, 

 equal in width to the prothorax and distinctly more than twice as 

 long, obtusely and rather abruptly rounded at apex, the striae coarse, 

 moderately impressed and with rather coarse and well spaced, deep 

 umbilicate annuli; series closer, with the punctures slightly confused, 

 toward the sides; intervals alternately wider and higher and with 

 minute scattered punctules, the second basally with an impressed 

 series of two to five or six coarse punctures; pygidium moderately 

 transverse, rounded apically, convex, not impressed along the base; 

 anterior tibiae with the fourth or upper tooth small but acute and 

 distinct, the first or apical slender, externally oblique and pointed 

 at apex, the second slender, obliquely truncate internally at tip; 

 external spinule of the hind tibiae small; abdominal segments each 

 with a series of coarse umbilicate and areolate punctures along the 

 basal margin, also with a series of simple discal punctures laterally. 

 Female a little larger than the male but not differing otherwise, 

 except in having the pygidium shorter, less convex, more transverse, 

 deeply biimpressed along the basal margin and with smaller and 

 much sparser punctures. Length (3 c/ 1 , 5 9) 19.4-20.5 mm.; 

 width 9.0-9.8 mm. Texas and Louisiana texensis n. sp. 



Pygidium (cf) with fine sparse punctures, becoming a little less fine 

 basally, though everywhere sparse and differing further from those 



