124 MEMOIRS ON THE COLEOPTERA 



punctured; clypeus nearly twice as wide as long, trapezoidal, the 

 oblique sides feebly sinuate, becoming straight and parallel at base, 

 the apex broadly and strongly reflexed, the sides rather more feebly, 

 the upturned apical margin thin and with a rather deep medial 

 sinus, the angles prominently rounded; suture wholly obsolete; eyes 

 rather small, not at all prominent; mentum anteriorly very convex, 

 sparsely punctate, bristling along the sides with very long fulvous 

 setae, the bottom of the basal concavity with finer and more flavate 

 hairs; ligula very small, truncate; antennal club rather small; pro- 

 thorax not more than one-half wider than long, strongly, evenly 

 convex, the sides evenly rounded throughout, becoming very con- 

 vergent apically and parallel basally, the apical sinus even, the 

 angle? only moderately produced and blunt at tip, the basal obtuse, 

 moderately rounded; marginal bead fine along the sides, thick and 

 entire at apex and base, the coriaceous apical margin not at all 

 angulate medially; punctures rather coarse, moderately separated, 

 finer and sparse medio-basally; scutellum notably small, impunctate, 

 as long as wide, ogival; elytra but very little longer than wide, 

 barely twice as long as the prothorax and slightly wider, the sides 

 feebly arcuate, somewhat inflated except basally, rapidly very obtuse 

 at apex, having broadly and rather strongly impressed sulciform 

 striae, which have rather coarse and shallow, well spaced annular 

 punctures, the intervals finely, feebly and sparsely punctate; toward 

 the sides the punctures are rather more confused and the series un- 

 impressed, the flanks (9 ) broadly impressed behind the humeri but 

 without trace of other modification; pygidium with rather coarse, 

 impressed and well separated punctures; middle coxae subcontiguous, 

 this region and the femora with many long bristling fulvous setae; 

 sterna with less coarse subdecumbent fulvous pubescence; abdomen 

 with the usual single setigerous series of punctures, also confusedly 

 and closely punctured toward the sides; legs long, moderately slender, 

 the hind tarsi filiform and much longer than the tibiae in both sexes. 

 Length (9) 20.0 mm.; width 11.7 mm. Arizona (Huachuca Mts. 

 Miller Canon), Wenzel cribrifrons Schf. 



I owe a female of this interesting species to the kindness of Mr. 

 H. W. Wenzel, of Philadelphia. Its general resemblance to the 

 unique type of Mononidia, described above, in the form of the 

 body, uniform black shining integuments and coarsely sulcate 

 elytra, is rather marked, but the resemblance goes no further, the 

 structural characters being radically different. 



Ancognatha Erichs. 



The deeply excavated ligular part of the mentum and the pointed 

 ogival clypeus, well distinguish this genus from any other except 

 Mimeoma, the special features of which are given under that title 

 below. The body is above the average in point of size, the head 



