Small (Outsider (Air, Cold, Extraplanar)) CR 3
HP 13, hd3d8 AC 18 (+1 size, +3 Dex, +4 natural), touch 14, flat-fooded 15 Fort +3, Ref +6, Will +3 Speed 30 ft. (6 squares), fly 50 ft. (perfect) Initiative +7 Spot , Listen
Standard attacks BAB +3, Grapple ?1
Attacks
Full attack: 2 claws +4 melee (1d3 plus 1d4 cold)
Special Attacks/Qualities
Breath weapon, spell-like abilities, summon mephit
Damage reduction 5/magic, darkvision 60 ft., fast healing 2, immunity to cold, vulnerability to fire
Skills Bluff +8, Escape Artist +9, Hide +13, Listen +6, Diplomacy +4, Disguise +2 (+4 acting), Move Silently +9, Spot +6, Use Rope +3 (+5 with bindings)
Feats Dodge, Improved Initiative
Str 10 Con 10 Dex 17 Int 6 Wis 11 Cha 15
Alignment Usually neutral, Environment Elemental Plane of Air, Organisation Solitary (1), gang (2?4 mephits of mixed types), or mob (5?12 mephits of mixed types)

Ice mephits come from the Elemental Plane of Air.
Ice mephits have a cold, aloof demeanor. Each one is about 4 feet tall and weighs about 30 pounds.
Ice mephits speak Common and Auran.

Breath Weapon (Su): 10-foot cone of ice shards, damage 1d4 cold, Reflex DC 12 half. Living creatures that fail their saves are tormented by frostbitten skin and frozen eyes unless they have immunity to cold or are otherwise protected. This effect imposes a ?4 penalty to AC and a ?2 penalty on attack rolls for 3 rounds. The save DC is Consitution-based and includes a +1 racial bonus.
Spell-Like Abilities: 1/hour?magic missile (caster level 3rd); 1/day?chill metal (DC 14, caster level 6th). The save DC is Charisma-based.
Fast Healing (Ex): An ice mephit heals only if it is touching a piece of ice of at least Tiny size or if the ambient temperature is 32°F. or below.

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System Reference Document -> List of Creatures (SRD)