152 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



apex to base, intervals rather smooth, although very feebly indentato- 

 punctate, densely reticulato-punctate laterally. 



Elytra about twice as long as wide, oblong; sides parallel to feebly 

 divergent posteriorly, apex broadly rounded ; punctures of the disk rather 

 coarse and separated by a distance equal to one or three times their 

 diameter, finer and more widely spaced toward apex. 



Abdomen finely and not noticeably densely punctate, except on the 

 fifth segment, which is unmodified on the disk in the male. 



Legs slightly elongate, femora subparallel. 



Male. Rather elongate, parallel and narrower. Pronotal central 

 macula more or less oval. Antennae slightly stouter. Abdomen more 

 coarsely punctate toward the apex ; fifth ventral segment truncate at apex. 



Female. Subparallel, stouter and slightly wider posteriorly; sides 

 very feebly arcuate. Pronotal central macula more or less hourglass-shaped, 

 anterior lobe about reaching to the apical margin, posterior lobe with a 

 short reentering median line of pale hairs ; lateral semilunar lines rather 

 indefinite. Fifth ventral rounded at apex. 



Measurements. Length (Types), 2.0-3.0 mm.; width, .8-1.1 mm. 



Type locality. Marsh Ranch, Green Point, Humboldt County, 

 California. 



Holotype, male, and paratypes in my own collection ; allotype, female, 

 in that of the California Academy of Sciences. 



Habitat. California (on Green Point and Redwood Creeks, Hum- 

 boldt County, in June ; in May, F. W. Nunenmacher ; Del Norte County, 

 F. W. Nunenmacher; Duncan Mills, Sonoma County, June, F. E. Blais- 

 dell). 



Number of specimens studied, 29. 



Variations. Antennae and legs may be piceous. The basal dark 

 fascia of the elytra may be dissolved into a juxta-scutellar macula on each 

 side, and a humeral lunule that may join the post-basal macula. 



Simplex in color and maculation resembles annulatus, but is more 

 elongate and less stout, with pronotum narrower. In annulatus the basal 

 fascia is usually rather widely interrupted at the scutellum and suture and 

 no variations have been observed. 



Listrus incestus, new species. Form elongate, oblong-oval and 

 moderately convex. Color black, appendages nigro-piceous, second joint 

 of the antennae pale, terminal joints black ; surface somewhat shining, 

 lustre more or less feebly purpureo-cupreous anteriorly. 



Pubescence short and decumbent, argenteo-cinereous in color and 

 arranged in maculae and fasciae of brownish hairs on the elytra as fol- 

 lows : A broken basal fascia, forming a small humeral and parascutellar 

 macula on each elytron, usually small but variable in size; a post-basal 



