BRAINS OF THREE GENERA OF ANTS 533 



7. THE CENTRAL BODY 



The central body (figs. 13, 14, c.b.), corps central Viallanes, 

 Zentralkorper, Floegel, is situated in the median line of the body, 

 toward the posterior part of the protocerebral lobes and indeed 

 embedded in them, for the anterior dorsal commissure arches above 

 the central body and the ventral masses of the protocerebral 

 lobes lie beneath it. The structure of the central body is the 

 same in the different castes and also in the three genera under 

 consideration, but varies in size with the size of the brain in 

 which it is present (figs. 32-40). The dorsal part is curved in 

 outline and consists of fibrous substance distributed into bundles 

 which are arranged radially, and are separated by narrow spaces 

 containing small nerve cells almost devoid of cytoplasm. A 

 curved line of the same small nerve cells separates the dorsal 

 from the ventral part, both of which are connected by bundles 

 of fibers with the protocerebral lobes (figs. 13, 14). 



8. THE "tubercles OF THE CENTRAL BODY" 



The so-called tubercles of the central body are two small 

 fibrous masses situated beneath the posterior part of the central 

 body, connected with it by fibers, and extending behind the cen- 

 tral body beneath the posterior dorsal commissure, and dorsal 

 to the protocerebral lobes (figs. 17-21). At their posterior ends 

 these bodies enter and become a part of the fibrous core of the 

 protocerebral lobes (figs. 21, 22). 



Viallanes has termed these bodies "tubercules du corps central," 

 and believes that they are associated with the central body. 

 Kenyon considers them related to the ocellar nerve fibers, as his 

 term ''ocellar glomeruli" indicates. Jonescu ('09), follows the 

 view of Kenyon in terming these structures " Ocellarglomer- 

 ulen," but he notes that they are connected by fibers with the 

 central body. On page 142 he states: 



Die Ocellarglomerulen die man auch als Kerne der Ocellen bezeich- 

 nen konnte, zeigen auch dieselbe Form und Struktur bei alien drei 

 Bienen formen (Drohne, Konigin und Arbeitsbiene). Sie stehen in di- 

 rekter Beziehung mit dem ausseren Teil des Zentralkorpers. Fasern von 



