San joe CA widows

[P. Novak]

i dont know anything about black widows cept that their venom could be fatal to old and young and the sick people. so i live in san jose CA and was wondering what are the windows scientific names that are around here. the females are jet black all over except for the very obvious red hourglass on the underside of her abdomen. thanks!

 

[JPD]

Latrodectus hesperus.

 

[P. Novak]

thank you!