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PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES 
Series 4, Volume 64, Supplement 1 
Tribe Trechini 
Trechus (Microtrechus ) sp. ( vandykei group) 
Records: Santa Cruz Co.: Dolloff Cave; Empire Cave. 
Comment: The subgenus Microtrechus is otherwise known only from the eastern United States. 
Bibliography: Briggs and Ubick (1988); Ubick (2001). 
Trechus ( Trechus ) chalybius DeJean (troglophile) 
Record: Santa Cruz Co.: Empire Cave. 
Comment: A small colony formerly inhabited this cave, but no tenerals (young adults) have been found there. 
Bibliography: Barr (1964); Briggs and Ubick (1988). 
Family Dytiscidae (predaceous diving beetles) 
Undetermined 
Records: San Benito Co.: Bear Gulch Cave. Tulare Co.: White Chief Cave; Cirque Cave. Trinity Co.: Paul Gibson Cave. 
Family Gyrinidae (whirligig beetles) 
Undetermined 
Records: Amador Co.: Lulu Bell Cave. San Benito Co.: Bear Gulch Cave. 
Gyrinus plicifer LeConte 
Record: Tuolumne Co.: McLean’s Cave. 
SUBORDER POLYPHAGA 
Superfamily Cucujoidea (fungus beetles, lady beetles) 
Undetermined 
Record: Mariposa Co.: Spider Cave. 
Bibliography: Zara Environmental (2009). 
Family Agyrtidae (primitive carrion beetles) 
Subfamily Necrophilinae 
Necrophilus sp. 
Records: Amador Co.: Connie’s Cave. Plumas Co.: Juniper Cave. 
Necrophilus hydrophiloides Mannerheim 
Records: Amador Co.: Moss Cave; Mushroom Cave; Rippled Cave; Root Cellar Cave; Santa Claus Cave; Skeleton Cave; 
Sutter Creek Cave. Calaveras Co.: Crystal Stanislaus Cave. Mariposa Co.: Pool Pit. Napa Co.: Clay Cave. 
Comment: This carrion beetle was collected in the twilight zone of Crystal Stanislaus Cave. 
Bibliography: Danehy (1951b). 
Family Anobiidae (wood-boring beetles, spider beetles) 
Subfamily Ptininae 
Undetermined 
Record: Calaveras Co.: Wool Hollow Cave. 
Niptus arcanus Aalbu and Andrews (troglobite) 
Record: San Bernardino Co.: Mitchell Caverns (type locality). 
Comment: This species is known only from the El Pakiva section of the caverns. 
Bibliography: Aalbu (1990); Aalbu and Andrews (1992). 
Ptinus sp. 
Record: Inyo Co.: Lower Shoshone Cave. 
