A Study (if Sonic Erüutoiiviiic Ants. 



309 



(•tlit r tonns. The iiiinibcr of eg<is in each tubule varied botli oii 

 tili' t\V(» sides of tlic s.nnc ovary and in tlie ovaries of ditferent 

 individiials of tlic sanic tviic. as also in tliose of different types. 



'l'lic \;uiati(iii in llic size of tlie ovaries in tlie different types 

 is icadily sccii in tlic tullowing- table: 



l.iiiL;ili "I "\.ii\ 

 in iiiiii 



If AoLEKz's Statement is correct. tliat all ants possessing- tlie 

 receptacul um seminis are to be considered as queens. then 

 we have in these one tliousand specimens 887 queens, 111 males, 

 and two iudividuals wliicli may be queens, if calculations are based 

 on the results obtained. 



('(inditidus houiologous to tliose occuring in Lcptotlwrax cmcrsoni 

 ■\vere n^xt stiugiit for in other species of tlie sanie genus. L. hngi- 

 s))iiii>.<i)ts 1 1 ()<;.., />. curvispinosus Mayk, a variety of tlie latter, L. 

 ohfnndor Wjikklkr, L. canadensifi Pkov., were the representatives 

 used. The sexual pliases are represented by males, queens, macro- 

 and microergates. No ergatoid nor ocellate workers were found in 

 any of these species with the exception of Leptofhorax canadcnsis. 

 In two nests of this last species three ocellate workers were found, 

 <»ne possessing- three ocelli, one possessing two ocelli in the posterior 

 Position, and one individual with the anterior ocellus. The Avorkers 

 of this sjiecies all show tlie saine thoracic structuie. wliich shows a 

 iireat simplificatioii : the three thoracic segments are indicated by 

 fnrrows; all the parts have fused with the exception of the sternite 

 <'f the mesuthorax. The queen is very nearly typical, a slight re- 

 »hiction has taken place, however; laterally the i)arts of the segmeuts 

 have l)conii to fuse. A few specimens of each were dissected to 

 determine the coiidition of tlie ovaries in the workers. The ovaries 

 l)0ssessed only a single tubule to a side. no receptacul um 

 seminis was found. Usually several eg'gs were present in a tubule; 

 sonietimes. however, onl}* one egg was i)resent. sometimes none. 



Zool. .Tiiliil. XIN Alith. f. Syst. 2Ü 



