Maryland has about 30 to 35 species with the black widow being the only venomous spider present here. The brown recluse is said to thrive here though its population is rare.
Common spiders: Northern Black Widow (Latrodectus variolus ), Southern Black Widow (Latrodectus mactans ), Common House (Parasteatoda tepidariorum ), Yellow Garden (Argiope aurantia ) species of Jumping (Salticidae), and Nursery Web (Pisauridae) spiders
Largest spiders: Species of Wolf (Lycosidae) and Fishing (Dolomedes ) family
Spiders in Maryland Identification Chart
Highly Venomous Spiders
Cobweb (Theridiidae)
Northern Black Widow (Latrodectus variolus ) Southern Black Widow (Latrodectus mactans ) False Widow (Steatoda grossa )
Sicariidae
Less Venomous Spiders
Orb-Weaver (Araneidae)
Linyphiidae
Bowl and Doily (Frontinella pyramitela ) Filmy Dome (Neriene radiate )
Amaurobiidae
Jumping (Salticidae)
Cobweb (Theridiidae)
Common House (Parasteatoda tepidariorum ) Triangulate Cobweb (Steatoda triangulosa )Steatoda borealis Theridula emertoni
Cellar
Crab (Thomisidae)
Wolf (Lycosidae)
Nursery Web (Pisauridae)
Woodlouse Hunter
Ground (Gnaphosidae)
Anyphaenidae
Eutichuridae