2.2 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 65 



prolongations of the chitin. They do not arise from sockets, are not 

 hollow and do not communicate with the lumen (L) of the tongue. 

 The spoon-shaped lobe, the labellum (fig. 7, Lbl) forming the tip 

 of the tongue, is also covered with pseudo-hairs. These are short and 

 thick and are branched at their tips, while those on the tongue are 

 long and slender and are unbranched. Several minute pseudo-hairs 

 are also present on the dorsal side of the mentum (fig. 7, Mt) and 

 elsewhere on various parts of the integument. 



The writer in 19 14 made a study of the innervated pores (called 

 olfactory pores) found on the wings, legs, and sting of the honey bee. 



Fig. 1. — Internal anatomy of varieties a and b of spinelike, innervated hairs 

 of worker honey bees, x 580. A, variety a on epipharynx (figs. 9 A and 10, Ep). 

 B, C, D and E, variety b: bi from outer surface at proximal end of mandible 

 (fig. 7, Md), bi from inner surface at distal end of mandible (fig. 8, Md), b 3 

 from pharyngeal plate (figs. 9 B and 10, PhPl), and bi from outer surface at 

 tip of mandible (fig. 7, Md). C from 17-day-old pupa, B and E from 20-day-old 

 pupae, and A and D from 21-day-old pupse. The nerve (iVs) in D is taken from 

 a deeper focus than the other parts in the figure. See page 54 for explanation 

 of abbreviations. 



At that time he also saw the same pores on the mouth-parts, and 

 since then has seen a few on each antenna near its articulation with 

 the head. 



1. Structure of the Innervated Hairs 



Innervated hairs may be roughly divided into spinelike and peglike 

 hairs, although there is no sharp dividing line between the two classes. 

 The different varieties of these two classes vary gradually from long, 

 slender hairs to short, stubby ones. For description the varieties may 

 be designated alphabetically. 



