A List of California Arachnida 



VI. ACARINA OR THE MITES AND TICKS 

 F. Cox, P. Jahraus, \V. Moore 



Figures from Hall, except the plate. 



EUPODIDAE. Body divided into cephalothorax and abdomen. Palpi without thumb. 

 Beak small. Eyes when present near posterior edge of the cephalothorax. Body soft. 

 Moderate to very long legs. Palpi short. Mandibles small but chelate. Mostly on 

 ground, predaceous. 



Eupodes brevipes Bks. Body red, legs clear. Slender. Sides concave. Laguna 

 Beach. 



Rhagidia pallida Bks. Under stones, Claremont. 



Penthaleus hicolor Bks. Spherical, dark body, red legs. Common Claremont. 



Bdellidae. Snout mites. Skin not hard. Palpi 4-5 segments. Cephalothorax 

 large, well separated from abdomen. Palpi large geniculate and bearing long tac- 

 tile bristles. Mandibles chelate. Body elongate. Lives in moss, dead laves, etc. 

 Predaceous. 



Bdella peregrina Bks. Claremont, Chino. 



B. lata Evving. On live-oak, under stones, etc. Claremont. 



B. californica Bks. Body white, legs, palpi yellowish beyond base. Body nar- 

 rowed in front to beak. Eye each side cephalothorax, four hairs in front, longer one 

 each side beyond eye. Abdomen a few short hairs above. Legs rather slender. 

 Clarmont. 



B. utilis Bks. from black scale. 



Anystidae. Coxae contiguous, radiate. Legs slender, bristly. Body few hairs. 

 No dorsal grove. Tarsi not swollen. 



Erythraeus posticatus Bks. Palpi slender, a long thumb. Body dark red, legs 

 pale. From bark of eucalyptus, Claremont. 



E. augustipes Bks. Under stones, Claremont. 



E. hiltoni Bks. Claremont. 



Erythaeus sp. not mature, on phalangid, Palmer's canyon near Claremont and on 

 horned toad Laguna Beach. 



Tarsotomus terminalis Bks. Body slightly constricted in middle. Two eye spots 

 in cephalothorax. Many long erect bristles. Claremont. 



T. macrnpalpis Bks. Large species sparce bristles, body nearly twice as long as 

 broad. Claremont. 



Tetranychidae "Red spiders". "Palpus with thumb, body well clothed with 

 hairs. Legs I and II without spine-like processes. Coxae not radiate. Legs usually 

 in groups of two each. No dorsal grove on cephalothorax. Tarsi not swollen. Man- 

 dibles for piercing. Hair on body usually in four longitudinal rows. Body oval, few 

 bristles. Suture between second and third pair of legs. Red, two to four eyes. Pedi- 

 palps four jointed, usually a strong claw on next to last joint. 



