56 



THE THORAX OR TRUNK. 



To designate the manner in which these cells and ner- 

 vures, or veins and veinlets, are often designated, we 

 append the following diagram : 



WINGS OF THE BEE. 



1. Neryukes. — a, costal ; d^ post-costal ; c, extemo-medial ; /, 

 tinal ; g^ w, cransverso-medial ; h, radial ; ^, cubital ; k, discoidal ; 

 Z, sub-discoidal ; n, recurrent ; &, apical ; c, postero margin ; o, 

 stigma. 



2. Cells. — I, costal ; II, externo-medial ; III, interno-medial ; 

 IV, anal ; Y, marginal ; VI, 1st ; VII, 2d ; VIII, 3d ; IX, 4th 

 sub-marginal ; X, 1st ; XI, 2d ; XII 3d discoidal ; X, 1st ; X, 

 2d, apical 



CHAPTER VIII. 



ABDOMEN. 



cerceris arenana. 



