A Bumblebee is a Pastel Spider, so with a Pastel x Spider pairing, each egg would have a 25% chance of receiving both the Pastel and Spider genes that is required to be a Bee.
A Super Pastel (a homozygous Pastel) will always pass off the Pastel gene, so all of the hatchlings will be at least a Pastel. In a Super Pastel x Spider pairing, each egg will have a 50% chance of receiving the Spider gene as well. Since they will automatically receive the Pastel gene, those that receive the Spider gene as well will be Bumblebees. Those that receive a Normal gene from the Spider parent will be Pastel.
In order to produce a Killerbee, you would need to have a Pastel gene coming from both parents and a Spider gene coming from at least one parent. The minimum morphs needed to produce a Killerbee would be a Bumblebee x Pastel pairing.
I'm sorry if you were meaning that a Killerbee was a Super Pastel Spider, but when you put "Killerbee= SuperpastelxSpider", to me that means that you would produce a Killerbee when you cross (x) a Super Pastel and a Spider, which is incorrect. Killerbee = Super Pastel Spider or Killerbee = Bumblebee x Pastel would be the correct way of writing that.