E. A. COCKAVNK 



105 



9th soifincnt : on left, ;i ponis, riiigwa 

 right, ostiiiiu bursae, bursa and rod. 



tWI) VJllVCS 



and 



sacculi ; on 



(A) 



(B) 



Diagram h. Halved gynandromoi])li, Amorplui populi (191")). A buff specimen (colour 

 same both sides). Left S , right ? . Almost perfect lialviug internally and externally. 



(A) 1, Ovipositor; 2, rod of ovipositor; 3, ostium bursae; 4, bursa copulatiix ; 4<i, rod 

 of ninth segment ; .5, nncus; (!, seaphium ; 7, valve; 8, saeculus; 9, penis; 10, vesica 

 of penis; 11, riugwall. 



Vertical line divides <f from s part except part of a valve and seaphium ( j organ). 



(B) 1, Ovary; 2, oviduct; 3, cement gland; 4, bursa copulatrix; 5, caput bursae; 

 6, testis; 7, vesicula seminalis; 8, glandula aecessoria; 9, ductus ejaculatorius; 

 10, penis. 



(9) (Diagram?:.) Halved. L. </, R. ?. 



External genitalia. 



10th segment: left side, uncu.s and seaphium; I'iglit side, half 

 ovipositor and rod. 



9th segment : left side, penis with ill-developed aedoeagus, perfect 

 vesica and cornuti, two valves and sacculi perfectly formed ; right side, 

 small ostium bursae and bursa, .-ind rod. 



Hereditary gynandromorphism has also been noticed by other 

 observers. 



Lang with inbred Aglia tau obtained in successive years 1, 2, 2, and 

 1 gynandromorphs out of totals of 800, 988, 1109, and 581 respectively, 

 or approximately one gynandromorph in 600 ('17 °/„). 



Rowland-Brown, quoting Oberthiir, states that at Dompierre in 

 France halved gynandromorphs of the common blue, Polyommatus 

 icarus, are fairly numerous. His collector caught 27 of these in a 

 single season. 



