Spiders in Maryland

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

Highly Venomous Spiders

Cobweb (Theridiidae)

• Northern Black Widow (Latrodectus variolus)
• Southern Black Widow (Latrodectus mactans)
• False Widow (Steatoda grossa)

Sicariidae

• Brown Recluse (Loxosceles reclusa)

Less Venomous Spiders

Orb-Weaver (Araneidae)

• Marbled Orb-weaver (Araneus marmoreus)
• Yellow Garden (Argiope aurantia)
• Furrow Orb-weaver (Larinioides cornutus)
• Heptagonal Orb-weaver (Gea heptagon)
• Orchard Orb-weaver (Leucauge venusta)
• Hentz Orb-weaver (Neoscona crucifera)

Linyphiidae

• Bowl and Doily (Frontinella pyramitela)
• Filmy Dome (Neriene radiate)

Amaurobiidae

• Black Lace-Weaver (Amaurobius ferox)

Jumping (Salticidae)

• Bold Jumper (Phidippus audax)
• Tan Jumping (Platycryptus undatus)
• Dimorphic Jumper (Maevia inclemens)

Cobweb (Theridiidae)

• Common House (Parasteatoda tepidariorum)
• Triangulate Cobweb (Steatoda triangulosa)
• Steatoda borealis
• Theridula emertoni

Cellar

• Long-bodied Cellar (Pholcus phalangioides)

Crab (Thomisidae)

• Green Crab (Misumessus oblongus)

Wolf (Lycosidae)

• Tigrosa georgicola
• Tigrosa helluo

Nursery Web (Pisauridae)

• Dark Fishing (Dolomedes tenebrosus)
• Six-spotted Fishing (Dolomedes triton)

Woodlouse Hunter

• Woodlouse (Dysdera crocata)

Ground (Gnaphosidae)

• Eastern Parson (Herpyllus ecclesiasticus)

Anyphaenidae

• Hibana gracilis

Eutichuridae

• Strotarchus piscatorius