256 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



but deeply and rather coarsely punctate : apex transversely truncate, 

 a very little narrower than the base; sides strongly, almost evenly 

 arcuate throughout, and very minutely beaded; hase very feebly, 

 evenly arcuate; apical angles small but acute, anteriorly prominent, 

 dentiform, and feebly everted ; basal angles very obtuse, not rounded, 

 but not in the least prominent. 



Elytra aoout three times as long as the prothorax, gradually acute 

 at apex, inflated, widest at the middle, where they are about three- 

 fourths Avider than the prothorax; hase just visibly wider than the 

 base of the prothorax; humeri obtuse but not rounded, not at all 

 prominent ; skies evenly arcuate ; disc confusedly, finely creased, 

 rather coarsely and distinctly granulato-reticulate, very finely and 

 sparsely punctate, the punctures nearly simple throughout and not 

 denser laterally, arranged in very feebly defined unimpressed rows, 

 approximate toward the suture, then Avidely distant, with an uneven 

 and sparser row along the middle of the intervals. 



Legs moderate in length and A^ery slender; anterior femora not 

 dentate but Avith a Aery broad and obtuse rounded salient near the 

 apex; spurs of the anterior tibiae very slender and almost exactly 

 equal. 



Measurements. — Length, 13 mm. ; width, 6 mm. 



Colonel Casey writes that there is no described species Avith which 

 it can be compared, and says that it should be placed near dentipes. 

 If the sexes have the anterior femora armed it can be placed nowhere 

 else. The type is eAddently a female and the femoral tooth should 

 be more acute in the male. It does not differ any more than many 

 other aberrant forms of dentipes which I have seen. 



The folloAving Aberrations represented by uniques may be men- 

 tioned to make known extreme forms that are probably fortuitous: 



Aberration No. 1. — Antennae slender; sides of the pronotum evenly 

 arcuate from apex to base; basal angles obtuse. Elytra Avidest be- 

 hind the middle. Legs slender and moderate in length; anterior 

 femora Avith a small subacute tooth at about outer third; posterior 

 tibiae quite slender, the anterior moderately arcuate. Integuments 

 glabrous and shining. Female. — Length, 20.5 mm. ; width, 8.5 mm. 

 Taken with typical specimens at Berkeley, California. 



Ahei'ration No. 2. — Moderately robust, subopaque, and alutaceous, 

 antennae reaching slightly beyond base of the pronotum, the latter 

 subquadrate; base and apex truncate and equal to each other; sides 

 CA'enly but not strongly arcuate, feebly sinuate just before the basal 

 angles, the latter rectangular. 



Legs rather long and slender. 



This si')ecimen might at first glance be taken for a female quad.- 

 Hcollis. The apical angles of the pronotum are very acute and 

 everted at right angles. 



