Key to male genitalia
The British Coleophoridae segregate into two fairly discrete groups based on the form of aedeagus.
Species 37.001 to 37.065 have a simple tunica; species 37.066 to 37.109 have a two-pronged tunica.
37.065 and 37.066 are somewhat intermediate. 37.065 C.pennella essentially has a single prong and 37.066 C.laricella has two prongs but they entirely separate from each other, appearing more as a separated pair than two parts of a whole.
Species 37.001 to 37.065 have a simple tunica; species 37.066 to 37.109 have a two-pronged tunica.
37.065 and 37.066 are somewhat intermediate. 37.065 C.pennella essentially has a single prong and 37.066 C.laricella has two prongs but they entirely separate from each other, appearing more as a separated pair than two parts of a whole.