Coleoptera - Beetles
- Dytiscidae
- Death Valley Agabus Diving Beetle
Agabus rumppi
- Wooly Hydroporus Diving Beetle
Hydroporus hirsutus
- Leech's Skyline Diving Beetle
Hydroporus leechi
- Simple Hydroporus Diving Beetle
Hydroporus simplex
- Curved-foot Hygrotus Diving Beetle
Hygrotus curvipes
- Travertine Band-thigh Diving Beetle
Hygrotus fontinalis
- Carabidae
- South Forks Ground Beetle
Nebria darlingtoni
- Siskiyou Ground Beetle
Nebria gebleri siskiyouensis
- Trinity Alps Ground Beetle
Nebria sahlbergii triad
- Unnamed ground beetle
Scaphinotus behrensi
- Unnamed ground beetle
Scaphinotus longiceps
- Cicindelidae
- Sacramento Valley Tiger Beetle
Cicindela hirticollis abrupta
- Sandy Beach Tiger Beetle
Cicindela hirticollis gravida
- Oblivious Tiger Beetle
Cicindela latesignata obliviosa
- Greenest Tiger Beetle
Cicindela tranquebarica viridissima
- San Joaquin Tiger Beetle
Cicindela tranquebarica ssp.
- Hydrophilidae
- Leech's Chaetarthrian Water Scavenger Beetle
Chaetarthria leechi
- Ricksecker's Water Scavenger Beetle
Hydrochara rickseckeri
- Hydraenidae
- Wing-shoulder Minute Moss Beetle
Ochthebius crassalus
- Wilbur Springs Minute Moss Beetle
Ochthebius reticulatus
- Scarabaeidae
- Ciervo Aegialian Scarab
Aegialia concinna
- San Clemente Island Coenonycha Beetle
Coenonycha clementina
- Kelso Dune Glaresis Scarab
Glaresis arenata
- White Sand Bear Scarab
Lichnanthe albopilosa
- Bumblebee Scarab
Lichnanthe ursina
- Santa Cruz Rain Beetle
Pleocoma conjugens conjugens
- Saline Valley Snow-front June Beetle
Polyphylla anteronivea
- Death Valley June Beetle
Polyphylla erratica
- Atascadero June Beetle
Polyphylla nubila
- Delta June Beetle
Polyphylla stellata
- Andrews' Dune Scarab
Pseudocotalpa andrewsi
- Eucnemidae
- Dohrn's Elegant Eucnemid Beetle
Paleoxenus dohrni
- Elmidae
- Wawona Riffle Beetle
Atractelmis wawona
- Brownish Dubiraphian Riffle Beetle
Dubiraphia brunnescens
- Giuliani's Dubiraphian Riffle Beetle
Dubiraphia giulianii
- Unnamed riffle beetle
Microcylloepus formcoideus
- Unnamed riffle beetle
Microcylloepus similis
- Pinnacles Optioservus Riffle Beetle
Optioservus canus
- Anthicidae
- Antioch Dunes Anthicid
Anthicus antiochensis
- Sacramento Anthicid
Anthicus sacramento
- Meloidae
- Hopping's Blister Beetle
Lytta hoppingi
- Mojave Desert Blister Beetle
Lytta inseparata
- Molestan Blister Beetle
Lytta molesta
- Morrison's Blister Beetle
Lytta morrisoni
- Tenebrionidae
- Globose Dune Beetle
Coelus globosus
- San Joaquin Dune Beetle
Coelus gracilis
- Channel Islands Dune Beetle
Coelus pacificus
- Cerambycidae
- Rude's Longhorn Beetle
Necydalis rudei
- Curculionidae
- Nelson's Milderes Weevil
Miloderes nelsoni
- Lange's El Segundo Dune Weevil
Onychobaris langei
- Blaisdell's Trigonoscuta Weevil
Trigonoscuta blaisdelli
- Brown-tassel Trigonoscuta Weevil
Trigonoscuta brunnotasselata
- Santa Catalina Island Trigonoscuta Weevil
Trigonoscuta catalina
- Dorothy's El Segundo Dune Weevil
Trigonoscuta dorothea dorothea
- Doyen's Trigonoscuta Dune Weevil
Trigonoscuta doyeni
- Santa Cruz Island Shore Weevil
Trigonoscuta stantoni
