need little help with my Monotype bug team

i would like some tips for my team:
Yanmega @ Choice Specs  
Ability: Tinted Lens  
EVs: 248 HP / 252 SpA / 8 Spe  
Modest Nature  
- Air Slash  
- Bug Buzz  
- U-turn  
- Giga Drain  

Crustle @ Weakness Policy  
Ability: Sturdy  
EVs: 4 HP / 252 Atk / 252 Spe  
- Rock Polish  
- Stone Edge  
- Earthquake  
- X-Scissor  

Scolipede  Black Sludge
Ability: Speed Boost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Protect  
- Baton Pass  
- Swords Dance  
- Poison Jab  

Pinsir @ Pinsirite  
Ability: Moxie    
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Bulk Up  
- Quick Attack  
- X-Scissor  
- Knock Off  

Escavalier @ Assault Vest  
Ability: Overcoat  
EVs: 248 HP / 252 Atk / 8 Def  
Adamant Nature  
- Iron Head  
- Knock Off  
- X-Scissor  
- Fell Stinger  

Volcarona @ Light Clay  
Ability: Flame Body  
EVs: 8 Atk / 248 SpA / 252 SpD  
Sassy Nature  
- Fiery Dance  
- Morning Sun  
- Light Screen  
- U-turn

instead of 8 evs in attk for volcarona put them in hp

For crustle, you should go with shell smash instead of rock polish, since you already have sturdy. Just something to consider

Go for sword dance instead of bulk up on Pinsir. Switch tue hp ev's to speed and maybe close combat instead of knock off for tue rock and steel types.