224 



AN INTRODUCTION TO ENTOMOLOGY 



Suborder II. ENTOGNATHA* 



Body not clothed with scales; mouthparts within the head, being 

 overgrown by folds of the gence; median caudal filament wanting; com- 

 pound eyes absent. 



Family 3, Campodeid^. Cerci filiform, long 

 and many-jointed; first abdominal segment 

 without styli. 



The best-known member of this family is 

 Campodea staphylmus (Fig. 229). It lives in 

 damp places under stones, fallen trees, or in 

 rotten wood and leaves. It is a very delicate, 

 small, white insect, about 6 mm. in length. It 

 has on the first abdominal segment a pair of 

 appendages which occupy a position corre- 

 sponding to that of the thoracic legs and each 

 consists of two or three segments. 



Family 4, Projapygidae. Cerci short, 

 rather stout, few-jointed; first abdominal seg- 

 ment with styli. 



This family is represented by the genera 

 Projapyx and Anajapyx. 



The species A. vesiculosus described by 

 Silvestri may be considered representative. 



Family 5, Japygidae. Cerci forceps-like; 

 styli present on first abdominal segment. 



This family is represented by the genus 



Jdpyx, of which two species have been found in 



this country. These insects can be recognized 



i7,-„ -,^„ ^ >, J by the forceps-like form of the cerci (Fig. 222). 



-big. 229. — Campodea rJ, n j i- .. • / 



staphylmus. (After They are small, delicate, uncommon msects 



Lubbock.) found under stones. 



*This suborder is raised to the rank of an order, Diplura, by Silvestri. Other 

 systeraatists believe it should rank as a definite order. 



