20 



INTRODUCTION 



upon insects, and is looked u})on as rather serviceable in the 

 destruction of flies. It is a quite inigainly looking creature, 



Fig. 1. — Sculigcra forceps: Adult — natural size. (From Marlatt, 

 Div. Ent., U. S. Dept. Ag.) 



with slender, flattened body, extremely long legs, and an 

 apparent duplication of anterior and posterior ends. 



The millipedes ( Diplopoda) are nearly cylindrical in 



