Plate LV 



Forest Species 



Pig. 1. Galls of Cherry-leaf Gall-mile, Acarus serotinw. (Beutenmiiller, 

 Bull. Amer. Mus. Nat. Hist.) 



Fig. 2. White Ant, Termes flavipes : a, queen ; h, young of winged fe- 

 male; c, worker; d, soldier. All enlarged as indicated. 

 (After Marlatt, Bull. Bur. Ent. U. S. Dept. Agr.) 



Fig. 3. Periodical Cicada, Tibicen septendecim. Young nymph, newly 

 hatched. Greatly enlarged. (Lugger, Rep. Ent. Minn. 

 Exp. Sta.) 



Pig. 4. The same: A, male, typical form '(natural size) ; c, d, genital 

 hooks of same (enlarged) ; g, sounding apparatus; B, male 

 of small form (cassinii), natural size; e, f, genital hooks 

 (enlarged). (Lugger, 1. c.) 



Pig. 5. Dog-day Harvest-fly, Cicada linnei, male. (Lugger, 1. e.) 



