Those are the (halloween hissers) right they are awesome looking I thought about getting them but these became avali me first so that's what I got I'm new to Roach's and I'm not sure but madagaskars are live dearers so to speak and unless you happen to catch it at the right time when she has the otheca extended you really wouldn't know unless you keep a detailed measure of there waist line LOL hope some one can help you get it figured out