180 MEMOIRS ON THE COLEOPTERA 



with about three setigerous punctures; pronotum more convex 

 medially, rather less obviously so in unicolor 9 



7 Elytra longer, about a third longer than wide. Form rather stout, 

 moderately convex, piceous-black, the pronotal and elytral reflexed 

 margins, epipleura, under surface except laterally and the legs, 

 pale testaceous; pubescence not close but rather long and stiff, 

 pale yellowish; head coarsely, rather closely punctate, except the 

 median parts of the front, distinctly narrower than the prothorax, 

 with broad neck and only moderately prominent eyes; antennae ( 9 ) 

 long, slender, pale in color, fully half as long as the body; prothorax 

 about one-half wider than long, the sides somewhat irregularly 

 rounded anteriorly, convergent and straighter posteriorly to the 

 rather prominent though obtuse angles; base broadly arcuate, dis- 

 tinctly narrower than the apex; surface very coarsely, rather closely 

 punctate, sparsely so medially, where minute sparse punctures are 

 also more or less obvious; sides only moderately broadly reflexed; 

 elytra distinctly wider posteriorly than at base, two-thirds wider 

 than the prothorax, feebly alutaceous, especially in the female, the 

 striae very fine, unimpressed, even and finely, rather closely punc- 

 tulate, the flat intervals with confused sparse punctures which are 

 similar to those of the striae; male with the last ventral evenly, 

 circularly rounded and having, posteriorly on the disk, a very feeble 

 obtuse carinule. Length (c? 9) 11.0-11.5 mm.; width 3.8-4.1 mm. 

 Arizona (locality unrecorded) arizonensis Schf. 



Elytra distinctly shorter, about a fourth longer than wide 8 



8 Form, size and coloration nearly as in the preceding but rather 

 narrower; head similarly well developed, with broad neck and still 

 larger though only moderately prominent eyes, the punctures not 

 quite so coarse and more widely separated; antennae (9 ) pale, long 

 and slender, almost half as long as the body; prothorax less trans- 

 verse, but little over a fourth wider than long, the outline nearly 

 similar, except that the basal angles are more prominent, right and 

 sharp, the short sinus before them decidedly deep and the base 

 relatively wider though evidently narrower than the apex, the apical 

 angles similarly very broadly rounded ; surface with coarse and deep 

 though rather well separated punctures, a little sparser medially but 

 not intermingled very evidently with remote punctules, the sides 

 rather more broadly deplanato-concave, the edge less strongly re- 

 flexed; elytra oblong-oval, only just visibly widest subposteriorly, 

 one-half wider than the prothorax, the striae fine and finely punctate 

 but a little stronger than in the preceding, the intervals very faintly 

 convex, more shining, with the confused punctures somewhat less 

 sparse and a little stronger; inclined hairs slightly more numerous and 

 much shorter. Length (9) n.o mm.; width 3.9 mm. Colorado. 

 Levette collection laticollis Say 



Form still narrower, the size much smaller; color piceous but slightly 

 less blackish, similarly pallid at the margins and beneath; hairs stiff, 

 rather numerous, pale yellowish and much longer than in laticollis; 

 head notably smaller, with narrower neck, similar eyes and closer 

 and coarse punctures, which are wanting antero-medially; antennae 



