A STUDY OF THE SPERMATOGENESIS OF TWENTY- 

 TWO SPECIES OF THE MEMBRACIDiE, JASSID.E, 

 CERCOPIDiE AND FULGORID^, WITH ESPECIAL 

 REFERENCE TO THE BEHAVIOR OF THE ODD 

 CHROMOSOME^ 



BY 



ALICE M. BORING 

 With Nine Plates 



Introductipn 470 



Historical review 470 



Material and methods 478 



Observations 480 



M embracidse 480 



Entilia sinuata 48 1 



Vanduzea arcuata 486 



Ceresa taurina 487 



Ceresa bubalus 488 



Ceresa diceros 489 



Atymna castanea 489 



Campylenchia curvata 489 



Enchenopa binotata 491 



Jassidae 492 



Chlorotettrix unicolor and C. vividus 492 



Diedrocephala coccinea 494 



Diedrocephala mollipes 495 



Phlepsius irrotatus 495 



Agallia sanguinolenta 496 



Cercopidae 496 



Clastoptera obtusa 496 



Aphrophora quadrangularis 497 



Aphrophora 4-notata 498 



Fulgoridae 498 



Poeciloptera septentrionalis 499 



Poeciloptera pruinosa 500 



Amphiscepa bivittata 501 



Pceciloptera bivittata 501 



Theoretical Considerations 502 



Summary 506 



Bibliography 509 



Description of Plates 513 



' A dissertation presented to the Faculty of Bryn Mawr College for the degree of Doctor of 

 Philosophy. 



The Journal or Experimental Zoology, vol. iv, no. 4. 



