RESULTS OF CROSSING TWO HEMIPTEROUS SPECIES. 493 



Plate 47. 

 {Cf. Plate 34 of this volume.) 



Photo 58. The intromitteiit organ from the pure variolarius of photo 58, plate 34. 



Length of intromittent organ, 94 ram. This pure variolarias male was raised 



in the laboratory in 1912, and the same season fertilized both a pure female 



variolarius and an Fi hybrid female. 

 Photos 69-61. Intromittent organs of 10 males from the above-mentioned pair of pure 



variolarius. 

 Photo 59. Intromittent organ of the male of photo 59, plate 34. Length of 



intromittent organ, 94 mm. 

 Photo 60. Intromittent organs of the three males of photo 60, plate 34. 



Lengths of intromittent organs : — 1st (upper), 98 mm. 2nd, 100 mm. 



3rd, 94 mm. 

 Photo 61. Intromittent organs of the six males of photo 61, plate 34. Lengths of 



intromittent organs : — 1st (upper), 100 mm. 2nd, 100 mm. 3rd, 100 mm. 



4th, 9oi- mm. 5th, 102 mm. Gth, 98 mm. 

 Photos 62-66. Intromittent organs of 18 males from the above-mentioned backcross 



(Fi hybrid 2 X pure variolarius S)- 

 Photo 62. Intromittent organs from the four males of Photo 62, plate 34. 



Lengths of intromittent organs :^lst (upper), 112| mm. 2nd, 105 mm. 



3rd, 12.^J mm. 4th, 117 mm. 

 Photo 63. Intromittent organs from the four males of photo 63, plate 34. 



Lengths of intromittent organs : — 1st (upper), 110^ mm. 2nd, 116 mm. 



3rd, 106 mm. 4th, 107 mm. 

 Photo 64. Intromittent organs from the six males of photo 64, plate 34. 



Lengths of intromittent organs: — 1st (upper), 115 mm. 2nd, 112| mm. 



3rd, 122i ram. 4th, 102 mm. 5th, 119 mm. 6th, 118 mm. 

 Photo 65. Intromittent organ from the male of photo 65, plate 34, Length of 



intromittent organ, 113| mm. 

 Photo 66. Intromittent organs from the three males of photo 66, plate 34. 



Lengths of intromittent organs: — 1st (upper), 11 4| mm. 2nd, II65 mm. 



3rd, 106* mm. 



