Gynandromorphous Agriades coridon. 247 



the Plebeid Blues ax homologous with those found and 

 oamed by Pierce and Burrows in the Noetuidae and Geo- 

 metridae, and. indeed, whether the prop and rein have 

 any homologues m these classes. Under these circum- 

 stances I must be contenl to leave my diagrams to show 

 my meaning without in any way insisting on the correctness 

 of my nomenclature. 



Anatomy of Internal and External Genitalia. 



The following are descriptions of eighteen gynandro- 

 morphs, fourteen examined in a fresh condition, four 



after preservation in spirit, all taken at Hon. -ion in 1915. 

 For the four specimens in spirit I am ii debted to Mr. 

 H. B. Williams. There are also descriptions of four 

 specimens with inequality of size, but without andro- 

 conia on the small side. Three had one or two blue 

 scales on the small side, the fourth had none and is, 1 

 believe, unique. The specimen described by Pickett as 

 having no blue scales has at least one. 



Xo. 1. Fore-wings, right 1<> mm. in expanse, Left L5 mm. Discal 

 spots ringed with white on both sides. al>. albicincia, Tutt. Many 

 blue scales on right fore- and hind-wings, numerous androconia 

 and coarse hair scales. Ovaries and cemenl glands equal and 

 normal. Spermatheca present. Caput bursae {bursa copulatrix, 

 Chapman) and ductus seminis absent. Rein and prop present. 

 External genitalia symmetrical and like those of normal female. 



No. 2. Fore-wings, right 13*75 mm., left 14 mm. Blue scales 

 withnumeiousandroconiaandcoar.se hair scales on left fore-wing. 

 Underside a I), parisiensis, Gerh., on both sides. Ovaries and cemenl 

 glands equal in size and normal. Bursa copulatrix, capul bursae, 

 ductus seminis and spermatheca normal Caput contained much 

 dark-coloured material. External genitalia symmetrica] and like 

 those of normal female. 



No. 3. Fore-wings, right 16'25 mm., lefl 15*75 mm. Under- 

 side almost symmetrical. Discal spots on upperside ringed with 

 white, pale blue wedges internal to lunules on both hind 

 Many blue scales and androconia on left fore- and hind-wings, 

 coarse hair scales on left fore-wing. Ovaries symmetrical Caput 

 bursae of abnormal shapi (Fig. 4). Ductus seminis represented by 

 a blind remnant leading from common oviduct. Cement aland 

 on left side small, on rajht side almost entirely aborted (Fig. 5). 

 Spermatheca normal. Caput bursae empty. External genitalia 

 symmetrical and like those of normal female. 



