412 MEMOIRS ON THE COLEOPTERA 



shining, piceous-black, the head black; pronotum generally obscure, 

 with pale side margins, the elytra less obscure to rather bright rufous; 

 legs and antennae piceous-brown ; head as long as wide to rather longer, 

 oval, with a fovea adjacent to the eye before the middle, another at a 

 third the length of the eye obliquely behind the latter and two or 

 three smaller near the base; antennae well developed, the outer joints 

 as long as wide or nearly, the second much shorter than the third; 

 prothorax about as long as wide, testaceous to black, strongly rounded 

 at base; elytra about as long as wide, with diverging sides, equal in 

 length to the prothorax, the punctures small but distinct, rather 

 close-set, sparser than in breviceps but closer than in the mesomelinus 

 series; abdomen with fine and notably dense punctures; sixth ventral 

 (cf ) with a small shallow rounded sinus, four times as wide as deep, 

 the adjoining surface feebly impressed for a short distance. Length 

 (cf 9 ) 7.0-8.0 mm.; width 1.35-1.6 mm. Vancouver Island, 

 California (Humboldt, Lake and San Mateo Cos.) and one example 

 labeled Guadalupe Island probably an adventitious importation. 

 Abundant. [Qnedius limbifer Horn] limbifer Horn 



Eyes at distinctly more than their own length from the constriction; 

 pronotum never so definitely paler at the sides 12 



12 Antennae shorter and more incrassate, the outer joints much shorter 

 than wide. Moderately stout, shining, brownish-testaceous, the 

 abdomen blackish, the head black; legs and antennae ochreo-tes- 

 taceous; head notably shining, subquadrate, the tempora feebly 

 converging and nearly straight almost to the base, where they are 

 rather abruptly rounded inward; surface without trace of minute 

 punctulation above, but with numerousdistinct puncturesthroughout 

 between the eye and the constriction, having also an anterior fovea 

 adjacent to the eye, two arranged transversely near the posterior 

 edge of the eye and one between the eye and the constriction, slightly 

 nearer the latter; prothorax fully as long as wide, much rounded 

 at the base and at the sides posteriorly; elytra but slightly ex- 

 panding and as long as wide, as long as the prothorax, at base 

 slightly narrower than the latter, the punctures rather close-set, small 

 but strong and distinct; abdomen having extremely minute and 

 moderately close punctulation, the pubescence rather long, close and 

 conspicuous. Length (9 ) 7.8 mm.; width 1.55 mm. Arizona (Fort 

 Yuma). A single example taken by the writer on the east bank of 

 the Colorado River. [Qnedius desertus Horn] desertus Horn 



Antennae longer, relatively less incrassate, the outer joints about as long 

 as wide in both sexes 13 



13 Head with only a few very fine scattered punctures at the sides, 

 between the eyes and the constriction, and with the diffused punctu- 

 lation of the entire upper surface excessively minute and subobsolete. 

 Body pale piceo-rufous in color, the head and abdomen slightly 

 more obscure; head fully as long as wide, the tempora feebly con- 

 verging and feebly, subevenly arcuate between the eyes and the 

 constriction, the anterior lateral fovea as in the preceding, having, 

 also, inwardly near the hind limit of the eyes, another, and one on the 

 flank midway between the eye and constriction; more dorsally there 



