266 MEMOIRS ON THE COLEOPTERA 



of each of the processes, the basal concavity with a few coarse shallow 

 punctures; prothorax as in truncatus but shorter, very nearly twice 

 as wide as long, the tubercle prolonged anteriorly by a much higher 

 and more strongly rounded ridge, obsolete only at the apical beading; 

 scutellum with more numerous dense coarse shallow punctures 

 basally; elytra oblong, parallel, longer than in truncatus, as wide as 

 the prothorax and two and one-half times as long, evenly rounded in 

 apical two-fifths, the very coarse, shallowly impressed lines enclosing 

 nearly similar entire and strongly umbilicate annuli, the intervals 

 much less regular, those toward the sides very broad and with many 

 very coarse confused punctures, the punctures of the second interval 

 extending, more remotely spaced, to well behind the middle; py- 

 gidium (cf) differing greatly, not smooth as in truncatus, but with 

 sparse though very coarse deep punctures, irregularly scattered 

 throughout; anterior tibiae with the three teeth shorter, the external 

 side of the hind tibiae with but one spiniform tooth, the one above it 

 very short and obtuse; abdomen nearly similar. Length (cf) 38.0 

 mm.; width 19.5 mm. Mexico (locality unrecorded). 



*recurvatus n. sp. 



3 Pronotum without a median tubercle at apex; pygidium (9) not 

 impressed at base 4 



Pronotum with a median tubercle at apex; intervals of the elytra alter- 

 nately more elevated; pygidium (9) biimpressed along the basal 

 margin 6 



4 Pronotum (cf) obsoletely bituberculate just behind the apex, the 

 tubercles separated by the end of the median furrow and wholly 

 wanting in the female. Black, shining; head armed with two cy- 

 lindrical horns, which become mere tubercles in the female; clypeus 

 at apex acute and strongly reflexed; prothorax with variolate punc- 

 tures, denser anteriorly and at the middle, the posterior parts 

 nearly smooth; median canaliculation broad; elytra striato-punctate: 

 anterior tibiae tridentate; transverse ridges of the posterior tibiae 

 prolonged into spines. Length 21.2-22.5 mm. Lower California 

 (Cape San Lucas) vitulus Lee. 



Pronotum (cf) not at all bituberculate apically 5 



5 Form rather slender, elongate, decidedly depressed, not very shining, 

 piceous-black, not much paler beneath; head three-sevenths as wide 

 as the prothorax, coarsely, not densely rugose, smooth at base; 

 tubercles similar in the sexes, small, separated by but slightly more 

 than a third the width, lying at each side of a triangular impression 

 having its acute apex at the acute reflexed clypeal apex and ex- 

 tending behind the tubercles to the smooth base of the head; side? 

 of the clypeus rather concave; prothorax one-half wider than long, 

 parallel, with evenly or subevenly and strongly rounded sides, the 

 apical sinus transverse, the angles advanced and prominent; basal 

 angles obtuse and rounded; basal bead not thick but strong and 

 entire; surface feebly canaliculate along the middle, the furrow very 

 coarsely punctate, gradually completely lost at about apical fourth; 

 punctures very coarse, rather close-set, shallow and variolate, be- 

 coming much sparser and smaller postero-laterad and basally; 



