Sexing spinies

[Chivalry]

My P. wahlbergii nymph is L4 now, I was wondering, how early can you sex these guys and do you count spines or what? Still pretty tiny and dark colored

 

[agent A]

i sex them the same way i sex blephs:

http://mantidforum.net/forums/index.php?showtopic=24479&hl=blepharopsis&fromsearch=1

 

[Chivalry]

Very helpful, thanks!