DESCRIPTION OF NEW SPECIES 147 



Martini belongs to the same group of species as annulatus, rubripes 

 and parvicejts described below. In rubripes the antennae are stouter, 

 surface lustre duller, and the pronotal central field is distinctly but not 

 densely indentato-punctate and the sides are more strongly arcuate, it is 

 found in Colorado. In annulatus the pronotal field is indentato-punctate 

 and the antennae are dark. In both rubripes and annulatus the elytral 

 dark fasciae are distinctly defined and do not tend to diffusion, as in 

 martini and parvicollis. In parvicollis the pronotum is noticeably small. 

 My series of annulatus are from the high Sierras, 7000 feet, and Mono 

 Lake, Mono County, California. 



Listrus maculosus Casey. Very distinct from amplicollis Casey with 

 which it is usually confused. In amplicollis the fifth ventral abdominal 

 segment is modified on the disk, while in maculosus it is simple ; in the 

 latter the third, fourth and fifth antennal joints are distinctly compressed, 

 large and triangular in form, the third joint is furthermore elongate and 

 comparatively large and bears a distinct stout chitinous seta at apical 

 border anteriorly in the male ; the antennae have their usual form in the 

 female. 



Maculosus is taken abundantly about San Francisco and in Marin 

 County. I took a very large series in Humboldt County, at Green Point 

 Ranch and Willow Creek, in 1917. Casey mentions only having had a 

 single male at the time of drawing up his description. 



Listrus vestitus, new species. Form elongate oval, distinctly more 

 than twice as long as wide and moderately convex. Color black, surface 

 more or less shining ; second, third and fourth joints of the antennae pale, 

 second always so, remaining joints more or less rufo-piceous, terminal 

 ones usually quite black; mouth and basal joints of the palpi pale, 

 epistoma more or less so ; tarsi and distal half or two-thirds of the tibiae 

 pale. A metallic lustre scarcely discernible, although the pronotum may 

 be slightly subcupreous. 



Pubescence distinctly cinereous, moderately long and recumbent. 

 Maculae of dark brownish or blackish hairs are arranged on the elytra 

 as follows : Basal fascia broken into a smaller humeral and a larger sub- 

 scutellar macula on each elytron ; post-basal fascia represented by a mid- 

 elytral subquadrate macula, which rarely extends arcuately forward to 

 the humeral forming a lunule; median fascia more or less narrow, dis- 

 tinctly and more or less sharply zig-zag, usually almost interrupted at the 

 suture and on middle of each elytron; subapical fascia broader, usually 

 interrupted at middle of each elytron, the median portions forming a more 

 or less rhomboidal and usually rather large macula across the suture; 

 apical maculae variable in size and form. Pronotal central macula more 



