Unlike many land-living arthropods , male spiders do not produce ready-made spermatophores ( packages of sperm ) but spin small sperm webs on to which they ejaculate and then transfer the sperm to syringe-like structures on the tips of their pedipalps .
Unlike many land-living arthropods , male spiders do not produce ready-made spermatophores ( packages of sperm ) . Instead , they spin small sperm webs on to which they ejaculate and then transfer the sperm to structures on the tips of their pedipalps .