E. A. Cockayne 79 



though there may be a rather intimate mixture of cells of male or 

 female character. 



The more gynaiuli-nmnrphs one sees the more unsatisfactory does 

 any attempt at classification by external characters appear to be. 



Unfortunately classification based on internal structure is greatly 

 hampered by thi' small immber of dissections carried out and described. 

 This is parth' dur to the difficulty of dissection, but far more to the 

 value of these specimens, and the reluctance of their owners to allow 

 any examination. The following classification is based on the somewhat 

 less elaborate one suggested in the Entomologist's Record. 



I. Genetic Hekmapiirouites. 

 Primarij .ve.c tjlonds of both sexes present. 



I. Lateral. 



(a) Ovary on one side. 

 Testis on the other. 



(b) Two ovaries on one side. 

 Testis on the other. 



(c) One ovary on one side. 

 Two testes on the other. 



((/) Two ovaries on one side. 

 Two testes on the other. 



II. Unilateral. 



Ovary or testis on one .side. 

 Ovary (//(// testis on the other. 



III. Bilateral. 



Ovary and testis on both sides. 



II. Pki.m.\ky Somatic Hermaphrodites. 



Sex gland or (/lands of one sex only, but parts of the secondary 

 sexual apparatus, internal or external, of both sexes present. 



(a) Male typf, with one testis or two testes. 



{b) Female type, with one ovary or two ovaries. 

 In some cases the glands are perfectly developed, but a partial or 

 completely rudimentary condition is not uncommon, especially in the 

 ovary. 



