When this grew up it became this:
Photo copyright Jim P. Brock, 2008
or perhaps it looked more like this:
Photo copyright Carol Adams
If you’d like to read about Giant Swallowtails, click here. If you’d like an article on their increase in New England, click here. If you’re wondering why I’m telling you this, it’s because this caterpillar dined on our grapefruit tree for several days before disappearing, no doubt to begin his metamorphose. It looks like he’s covered with fungus, doesn’t it? But that’s just His Special Look.
Many thanks to Trish and Hilary for the identification.
An Ex-Expatriate 
looks to me as if she’s wearing velvet panties and scarf! How elegant!
But in the caterpillar state s/he looks a lot more like a sci-fi monster!