296 



Margaret Hcilliday, 



qiieeiis dissected ; oiie haviiig long-, slender tiibules with quite a number 

 of eggs. as niany as fifteen tu a tiibule (Fig. Ab), tlie otlier 

 having sliort tubiiles and therefore fewer eggs (Fig. A a). Only 

 two ovaries of the first type were foimd, each possessing two tubules 

 to a side. tlie second type usually had just two eggs to a tubiüe, but 

 sometimes one and sometimes even tliree. The second type also 

 varied in tlie nnmber of tubules on each side. Of the eight 

 queens five, represented by the second type, had two tubules to 

 a side; one had three on eacli side; the other two varied, having 

 three on one side and two on the other. A tj-pical receptaculum 

 seminis was present in both types of ovaries. 



The condition in the workers was next determined. No ovaries 

 were ol)tained from quite a number of the workers dissected, pro- 

 bably on account of the small size of the ovaries and my lack of 

 skill. The number of tubules varied here also as in the queen: eight 

 individuals had three tubules on a side, four had two on one side 

 and three on the other; the remaining specimens had two on each 

 side. Very frequently the tubules were not well developed; others, 

 however, contained apparently normal and mature eggs, one to a 

 tubule. Among the mounted ovaries a very surprising discovery was 

 made — the ovary of an ordinary worker, indistinguishabie externally 

 from its fellows, possessed a typical receptaculum seminis! 

 This ovary had two well developed tubules to each side. and each 

 contained one normal and mature egg at its proximal end (Fig. A c). 



The following table shows the variations in the number of 

 tubules of the ovaries in the diflferent forms: 



It is interesting to note that in regard to external anatomy 

 also the queen is represented by two types ; one in which the node, 

 the distinguishing characteristic, is like that of the worker; in the 

 other type it is like that of the male. Seven of the former and 



