154 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



Collected by Mr. J. O. Martin, who possesses paratypes. 



Type locality and habitat. Bear Lake, San Bernardino County, Cali- 

 fornia. Collected May 5, 1919. 



Remarks. Incestus resembles both simplex, n. sp., and incertus 

 Casey. In incertus the sexes are shorter and rather more robust, the male 

 being rather more oblong ; centrally the pronotal disk is simply punctate, 

 antennae slenderer, joints five to ten triangular, tibiae and tarsi pale. 



Simplex has the central area of the pronotum simply punctate ; 

 antennae more compact, fourth joint somewhat shorter than the third and 

 distinctly obconical, fifth scarcely wider and feebly angulate anteriorly; 

 elytral dark fasciae rather broader and straighter, tibiae, tarsi and antennae 

 more or less pale. 



In difficilis the third joint of the antennae is cylindrical, the fifth 

 longer than wide, distinctly wider, sixth and following joints distinctly 

 shorter than the fourth. Central area of the pronotal disk not densely 

 indentato-punctate. 



Listrus giffardi, new species. Form oblong-oval, subparallel, slightly 

 elongate and very moderately convex. Color black, upper surface of body 

 with a more or less noticeable aeneous lustre ; antennae rufous, blackish 

 distally ; legs rufous throughout. 



Pubescence moderately short, not coarse, recumbent, moderate in 

 abundance and plumbeo-cinereous in color; slightly longer on the under 

 surface of the body, scarcely paler anteriorly. Elytral dark-brownish 

 hairs arranged in maculae and fasciae as follows : An elongate narrow 

 humeral and a broader posteriorly elongate parascutellar macula on each 

 elytron ; a post-basal small macula at middle on each side ; submedian and 

 subapical transverse fasciae rather wide with edges irregular ; apical 

 maculae rather large and distinct. Pronotal pubescence similar to that 

 on the elytra, maculae obscure, central constricted figure and moderately 

 wide lateral vittae feebly evident ; front of head darkish in the central area. 



Head about as long as wide, not large, eyes moderately prominent 

 and evenly convex ; front feebly and broadly impressed, punctures 

 moderately coarse, rather sparse, intervals smooth and obsoletely 

 indentate ; muzzle small. Antennae rather long and somewhat slender, 

 moderately compressed ; second joint oval, not stout, not twice as wide 

 as the third, the latter cylindrical, more than twice as long as wide, equal 

 to the fourth in length ; the latter obconical, slightly prominent anteriorly 

 at apex ; fifth about a half longer than wide, not widely triangular, about 

 as wide as the eighth or ninth, apical margin oblique, moderately promi- 

 nent anteriorly ; sixth and seventh subequal in length and size, almost a 

 little longer than wide, apical margin oblique; eighth to the tenth tri- 



