[header] How to kill spider eggs [title] Identify the spider and egg sacs to rule out a poisonous species. [step] Almost all spiders are harmless, but there are a few species with bites that require medical attention. If possible, check the egg sacs and any nearby spiders for characteristics of venomous species. 
Consider calling in a professional to deal with poisonous spiders. [substeps] The various black widow species are distinguished by the red markings, usually in the shape of an hourglass, on their abdomen's underside.