San Diego County, California, US
Beetle in the lower left of 1st picture looks like Tenebrio molitor.
On trunk of Platanus tree
Really big ceiling spider with a distinct purplish hue.
Under a log.
apparently a young, possibly A. erberi (the commonest species in the area)
Arachnids are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. All arachnids have eight legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Greek word ἀράχνη (aráchnē), meaning "spider".