348 



Leech and Chandler: Coleoptera 



f-*"< 



Fig. 13:43. .Staphylinidae. a,c, Liparocephalus brevipennis, 

 adult and larva, respectively; b,d, Diaulota densissima, adult 

 and larva, respectively (Saunders, 1928). 



Key to the California Species of Liparocephalus 



Adults 



Head conspicuously broader than prothorax and dis- 

 tinctly broader than long (length taken from clypeal 

 suture to extreme posterior border of head), the propor- 

 tions being as 7:6; head lighter in color than rest of 

 body; length (on slide and somewhat expanded) 6 mm.; 

 Moss Beach, San Mateo County; Mendocino County 



cordicollis LeConte 1880 



Head and thorax practically equal in width, length of 

 head equal to width or but very slightly greater; of 

 a uniformly dark color; length (on slide and somewhat 

 expanded) 4.5-5 mm. (fig. 13:43a); Alaska to California; 

 Moss Beach, San Mateo County 



brevipennis Maklin 1853 



Key to the Genera of Staphylinidae of the Intertidal 

 Zone of the California Coast 11 

 Adults 



1. Front and middle tarsi 4-segmented, hind tarsi 5- 

 segmented (but see preceding footnote). BOLITO- 

 CHARINI 2 



— Front tarsi 4-segmented, middle and hind pairs 5- 

 segmented; or all tarsi 5-segmented 5 



2. Anterior margin of labrum strongly rounded; eyes hairy 

 (fig. 13:436) Diaulota Casey 1893 



— Anterior margin of labrum truncate; eyes hairy or not 



3 



3. Eyes not hairy; antennal segments 9 and 10 clearly 

 longer than broad (fig. 13:43a) 



Liparocephalus Maklin 1853 



— Eyes hairy; antennal segments 9 and 10 obviously 

 broader than long 4 



4. Tibiae very short, anterior and middle pairs spinulose 

 externally; 5th abdominal segment longer than 4th 



Thinusa Casey 1893 



— Tibiae rather slender, clothed with rather coarse 

 pubescence, without trace of spinules; 4th and 5th 



abdominal segments of equal length 



Bryobiota Casey 1893 



5. Front tarsi 4-segmented, middle and hind tarsi 5- 

 segmented. ZYRINI Pontomalota Casey 1885 



— All tarsi 5-segmented. ALEOCHARINI 



Emplenota Casey 1884 



Key to the California Species of Diaulota 



Adults 



Body coloration uniformly dark throughout; length 

 about 2.7 mm. (fig. 13:436); Alaska to California; 



Moss Beach, San Mateo County 



densisaima Casey 1893 



At least head and abdominal tip reddish; length about 

 1.7 mm.; Alaska to California; Moss Beach, San Mateo 

 County brevipes (Casey) 1893 



"The key is largely a compilation. The primary divisions are 

 from one by Fenyes (1918), the only one available. Chamberlin 

 and Ferris (1929:142) have shown that the hind tarsi of Diaulota 

 brevipes Casey may be 4- or 5-segmented, or with fusions giving 

 intermediate conditions. 



After this manuscript was sent to the printer, there appeared 

 "A revision of the Pacific Coast Phytosi with a review of the 

 foreign genera", by Ian Moore. Trans. San Diego Soc. Nat. Hist., 

 12:103-152, inch pis. 8-11. March, 1956. It contains new keys to 

 the genera, and species. 



Genus Thinusa Casey 



Adults 



Length about 2.2 mm.: form very slender; abdomen black, 

 head slightly paler, pronotum and elytra dark piceous- 

 brown; legs and antennae reddish-testaceous; Alaska to 



California; San Francisco, San Diego 



maritima (Casey) 1885 



Genus Bryobiota Casey 



Adults 



Length about 2.3 mm.; form very slender; anterior parts, 

 legs and antennae pale reddish-testaceous, abdomen black, 

 apex of last segment slightly paler; southern California; 

 San Diego bicolor (Casey) 1885 



Key to the California Species of Pontomalota 12 

 Adults 



1. Head testaceous; 1st segment of hind tarsi fully 2/3 

 longer than 2nd; 4th abdominal segment, and some- 

 times base of 5th, clouded with castaneous color; 

 southern California opaca (LeConte) 1863 



— Head blackish 2 



2. First segment of hind tarsi scarcely longer than 2nd; 

 abdomen entirely black; Washington to southern Cal- 

 ifornia calif ornica Casey 1885 



— First segment of hind tarsi about 1/3 longer than 2nd; 

 apex of 3rd, 4th, and base of 5th abdominal segments 

 clouded with blackish castaneous; California; Santa 

 Cruz nigriceps Casey 1885 



Key to Some California Species of Emplenota 12 



Adults 



1. Basal segment of hind tarsi short, only slightly longer 

 than 2nd; southern California, San Diego County north 

 to Monterey County arenaria (Casey) 1893 



— Basal segment of hind tarsi much longer, equal to 



next two combined; southern California 



pacifica (Casey) 1893 



REFERENCES 



ALLEN, A. A. 



1953. A note on the habits of Trogophloeus arcuatus 

 Steph. (Col., Staphylinidae). Ent. Mon. Mag., 89:286. 



"After Casey, 1885. P. bakeri Bernhauer 1912, from southern 

 California, is omitted. 



