1912.1 



NATURAL SCIENCES OF PHILADELPHIA. 



AG1D 



Attached to its upper end was a fusiform opaque whitish mass (Ov) 

 1.8 mm. in length, apparently representing a single egg tube, and 

 seemingly containing only a single egg. 



As fig. 2 A and B show, the 

 external openings of the poison 

 apparatus on the one hand 

 and the spermatotheca and 

 vagina on the other are very 

 close together. In the normal 

 queen this is not the case 

 since they are separated by a 

 considerable interval, which is 

 taken up by the dorsal wall 

 of the bursa copulatrix. It is 

 evident, therefore,, in the case 

 under consideration, that the 

 bursa is very much shortened 

 'in an antero-posterior direc- 

 tion, in correlation with the 

 shortening of the sternite of 

 the 7th abdominal segment. 



The cause of the abnor- 

 malities recorded here is 

 entirely unknown. The cell 

 from which this queen emerged 

 was to all appearances en- 

 tirely normal. Moreover, these 

 abnormalities cannot be re- 

 lated to the sexual char- 

 acters of the drone or the 

 worker, except in so far as 

 the reduction of the ovaries 



OvD 



SpmGID 



BG1 



PsnScD 



Fig. 2. — A, poison apparatus and sex or- 

 gans of abnormal queen from dorsal 

 side. X 1\. B, ovary and oviduct of 

 abnormal queen. X 10. AG1D, duct 

 of acid gland. BG1, alkaline gland. 

 Ov, ovary. OvD, oviduct. PsnSc, 

 poison sac. PsnScD, duct of same. 

 Spm, spermatotheca. SpmGID, duct 

 of same. 



is peculiar to the worker, but in the latter case they are symmetrical. 

 The queen is not in any way hermaphroditic, but merely abnormal 

 in the reduction of certain parts of the abdominal wall and viscera. 



