Describe the structure of oothecae in cockroach.

(N/A) The ootheca in a cockroach is a dark reddish to blackish brown capsule that contains fertilized eggs.
It is approximately $8 \ mm$ long.
They are dropped or glued to a suitable surface,usually in a crack or crevice of high relative humidity near a food source.
On average,each female produces $9-10$ oothecae,and each ootheca contains $14-16$ eggs.