Out here we use the European night crawler. Very heat tolerant and they grow BIG.

Using shoe box size totes with either coco fiber or peat moss (have to use lime to raise Ph) with lots of shredded newspaper. Feeding them Purina worm chow and pureed green kitchen scraps & coffee grounds (fine ground egg shells are good too). Keep the medium moist - when you squeeze a handful - couple of drops of water should come out.

Waiting for some African crawlers right now.