84 H. C. FALL. 



broad, obliquely truncate, its tip about one and one-half times as 

 distant from the base as from the end of the claw. Length 7-8 mm. ; 

 width 3.6-4.2 mm. 



Lower California, San Jose del Cabo and Santa Rosa 

 (Beyer). 



The variation of the front of the clypeal margin is greater 

 in this than in any other of our species, and specimens with 

 the more broadly rounded clypeal angles would naturally be 

 referred by students to a different section of the genus. I 

 have a suspicion that the difference is in some degree sexual, 

 as is said to be true in certain Mexican species, but it is so 

 diffcult to distinguish the sexes that I am not sure of this. 

 The polished integuments with almost complete lack of alu- 

 taceous sculpture is a rare character and of itself sufficient to 

 distinguish polita among those with which it could by any 

 possibility be confused. I have noticed in this species a very 

 minute crenulation toward the base of the inner margin of 

 the claws. This structure is visible only with a strong lens 

 in a good light. It is present in all examples of the species 

 which I have examined, but I have detected it elsewhere 

 only in chiricahuce. 



86. D. errans n. sp. 



Oblong-oval, rufotestaceous, strongly shining, elytra scarcely detect- 

 ably alutaceous, rather finely punctate. Mental declivity very short, 

 beginning in advance of the anterior fourth, distinctly margined; 

 clypeus broadly reflexed, truncate at middle, the truncation just 

 perceptibly emarginate, limiting angles distinct but not prominent, 

 and with a well marked external sinus; basal part of clypeus in the 

 same plane with the front, the suture distinct and smooth at sides, 

 nearly obliterated medially. Head densely not coarsely punctate. 

 Prothorax not quite one-half wider than long, widest at or very slightly 

 in advance of the middle, sides strongly arcuate, base a little wider 

 than the apex, all the angles obtuse; punctuation fine, punctures dis- 

 tant from one to two times their own diameters, closest near the front 

 angles and in an area on each side of the middle of the disk. Elytra 

 two and two-fifths times as long at the prothorax, scarcely wider 

 behind, costae moderately distinct, first intercostal space moderately 

 wide and confusedly punctate; second narrower and with a single some- 

 what irregular series of punctures; third a little wider and more irregu- 

 larly punctured. Beneath rather finely and sparsely punctate, more 

 closely at sides as usual. Anterior tibiae broad, strongly toothed, the 



