Size of adult B. dubia?

[Pro_bug_catcher]

Hi,

A friend got these a few months ago as even smaller nymphs (they molted once since).
The person he got them from said they're Blaptica dubia. Another friend I showed them to told me he's never seen dubias this big.

So here are my questions :
1. Are they really that big? (i.e. is 2 inches 1/4 that big for a dubia nymph?)
2. Are they really dubias? (I know nymphs can be hard to identify, and I can post pictures of the imago as soon as they have their final molt, but that could take some time)

 

[rvtjonny]

Looks like dubia to me, But as far as the size thing goes, I got some that are pushing close to the 3 inch mark

 

[Edd Eskimo]

They look a lot like B.Dubia roaches..The nymphs are pretty large thou..all my adults are around 2in..They are probably about to mature soon..

 

[codykrr]

yeah...pretty much all my female Dubia's are 3 plus inches. nymphs are always about 1/4 of an inch. males with wings around 3.5 inches.

 

[Pro_bug_catcher]

Ok. Thanks for your help.

 

[ZephAmp]

Those are definitely NOT B. dubia.
They're some sort of Blaberus; Either a dark colored Blaberus discoidalis nymph, Blaberus craniifer, or a Blaberus sp. "Hybrid." I'd need to see a pic of the adults to know for sure.

 

[Pro_bug_catcher]

My friend doesn't have adults yet, we assume these are subadults but aren't sure.