.\ Study ut' Sniup Erffatoffyuic Ants. 



305 



soniewliiit nioiv acctiitualed. in tliat tlic scutellum is not distiiictlv 

 separate»! fidiii tlic luesoiiotuni. if tlie fiision of the meso- and i)r(i- 

 notuni lan tlius hv styled (Fiii'. Cf and Fig-. Ein. 



Mrasnienients to the Imndreth of a mm were niade of these 

 ditferent types. Tlie averages and the extremes in size are shown 

 in tliese tables folldwinu-. The ditfeiences in the size of the heads 

 are due almost entirel\" to the position of the mandibles, some of 

 the speeimens having them closed, others open. 



Table o f A v e r a ff e s. 



Table of extremes: 1 arge st and s malle st. 



The following table shows the extremes of the respective parts 

 of the b(»dy. No one ant fiirnishes these measurements but usually 

 five or more ditferent ones out of frinn twenty tive to fifty indi- 

 viduals. 



