EXPLANATION OF PLATE XV. 



Occipital regions and suspensoria of rijilionomorpha, one-lialf natural size. 



Fio. 1. Plalecarpua conjphceus : a, from behind ; 1>, from before ; c, from below. 



2. Platecarpus ictericiis : a, from bebind ; h, from below. 



3, riatccarpvs curtirosMs : a, from bebind ; b, from in front ; c, from below. 



