Monstrous Spider, Large (CR 2)

Large Vermin
Alignment: Always Neutral
Initiative: +3 (Dex); Senses: darkvision 60 ft., tremorsense 60 ft., and Spot +4*


AC: 14 (-1 size, +3 Dex, +2 natural), touch 12, flat-footed 11
Hit Dice: 4d8+4 (22 hp)
Fort +5, Ref +4, Will +1
Speed: 30 ft., climb 20 ft.
Space: 10 ft./5 ft.
Base Attack +3; Grapple +9
Attack: Bite +4 melee
Full Attack: Bite +4 melee
Damage: Bite 1d8+3 and poison
Special Attacks/Actions: Poison, web
Abilities: Str 15, Dex 17, Con 12, Int -, Wis 10, Cha 2
Special Qualities: Vermin
Feats:
Skills: Climb +11, Hide +3*, Jump +2*, and Spot +4*
Advancement: 5-7 HD (Large)
Climate/Terrain: Temperate forest
Organization: Solitary or colony (2-5)
Treasure: 1/10 coins, 50% goods, 50% items

Source: Monster Manual

All monstrous spiders are aggressive predators.

Monstrous spiders come in two general types; hunters and web-spinners. Hunters rove about, while web spinners usually attempt to trap prey. Hunting spiders are speedier than their web-spinning counterparts and use higher speed numbers shown in parentheses.

Monstrous spiders of both types have roughly circular bodies surrounded by outspread legs: 10 feet wide* and 1-1/2 feet high.
*The number includes the spider's body and its legs; the actual body diameter is about a third of the total.