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PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES 
Series 4, Volume 64, Supplement 1 
Quedius (Microsaurus ) erythrogaster Mannerheim (troglophile) 
Records: Amador Co.: Fern Frond Cave; Violin Cave. Calaveras Co.: Cave City Cave; Wool Hollow Cave. Mariposa 
Co.: Bull Creek Cave. 
Comment: Graham (1963b) reported one male found running near a wood rat nest in the entrance of Wool Hollow Cave 
as Q. (M) neotomae Hatch. Graham (1963b) reported an immature male found in a damp rocky guano pocket in the dark 
zone of Cave City Cave as Q. (M) sp. 
Bibliography: Graham (1963b); Peck and Thayer (2003); Smetana (1971). 
Quedius ( Microsaurus) limbifer Horn 
Record: Mariposa Co.: Bower Cave. 
Comment: One female was found in wet leaf litter in daylight. 
Bibliography: Graham (1963b). 
Quedius ( Microsaurus ) pellax Smetana (troglophile) 
Record: Calaveras Co.: Wool Hollow Cave. 
Comment: Five imagos of this species were collected from soil and debris beneath a wood rat nest. 
Bibliography: Graham (1963b); Smetana (1971). 
Quedius ( Microsaurus ) planus Hatch 
Record: Siskiyou Co.: Trail Junction Cave. 
Bibliography: Graening (2011c). 
Quedius ( Microsaurus ) spelaeus Horn (troglophile) 
Records: Plumas Co.: Juniper Cave. Shasta Co.: Subway Cave. Siskiyou Co.: Catacombs Cave; Cox Ice Cave; Mushpot 
Cave; Planetary Dairy Cave; Sentinel Cave; Skunk Hollow Cave; Slipstream Cave; Valentine Cave. 
Comment: This species is often associated with wood rat nests in twilight zones or damp soils in the dark zone. 
Bibliography: Graham (1963b); Peck (1973a); Peck and Thayer (2003); Smetana (1971). 
Subfamily Steninae (water skaters) 
Stenus sp. 
Record: Santa Cruz Co.: Vanished River Cave. 
Bibliography: Danehy (1951b); Graham (1963b). 
Subfamily Tachyporinae (crab-like rove Beetles) 
Bolitobius sp. 
Record: Tulare Co.: Ursa Minor Cave. 
Lordithon sp. 
Record: Mariposa Co.: Spider Cave. 
Lordithon thoracicus thoracicus Say 
Record: Mariposa Co.: Bower Cave. 
Comment: One specimen was found under damp wood in twilight. 
Bibliography: Graham (1963b). 
Sepedophilus castaneus (Horn) 
Record: Shasta Co.: Samwel Cave. 
Comment: One adult was collected in a sugar trap in twilight. This species was originally cited as Conosomus. 
Bibliography: Graham (1963b). 
Family Tenebrionidae (darkling beetles) 
Undetermined 
Records: Calaveras Co.: Bone Cave; Grapevine Gulch Cave; Porcupine Cave; Scat Cave; Wool Hollow Cave. Fresno 
Co.: Boyden Cave; *Hummel’s Cave; Windy Cliff Cave. Kern Co.: Bodfish Cave. Mariposa Co.: cave next to Spider 
Cave; Indian Cave; Spider Cave. Napa Co.: Clay Cave. San Benito Co.: Bear Gulch Cave. Santa Cruz Co.: Bat Cave; 
Empire Cave. Siskiyou Co.: Fossil Cave; Harris Mountain Cave; Lazaroff’s Hole; Sugar Pine Butte Ice Cave. Tulare Co.: 
