446 Beekeeping 



WzNv, mesothoracic wing nerve. 



W 3 Nv, metathoracic wing nerve. 



WP, wing process of pleurum. 



2. ALPHABETICAL LETTERING 



0, clypeal suture. 



6, anterior tentorial pit, in clypeal suture. 



c, posterior tentorial pit, in occiput beside foramen mag- 



num. 



d, thickened posterior edge of lateral wall of fossa of 



proboscis. 



e, process at upper end of d articulating with cardo of 



maxilla and forming maxillary suspensorium. 



/, internal median keel of vertex in cranium of drone. 



g, suspensorial ligaments of anterior end of oesophagus. 



h, pharyngeal rod. 



1, convolutions of dorsal blood vessel. 

 j, anterior articular knob of mandible. 

 k, ventral groove of glossa. 



1, ventral groove of maxillary rod. 

 m, median plates of wing base. 



n, basal hooks of glossa. 



o, median ventral plate of ligula. 



p, dorsal plates of anterior end of mentum, supporting 



ligula. 



q, inner wall of canal of glossa. 



r, chitinous rod of glossa. 



s, pharyngeal plate, on anterior part of floor of pharynx. 



t, salivary pouch opening on dorsal side of base of ligula, 



receiving common duct of salivary glands (SalD). 

 u, oblique muscles inserted upon dorsal side of salivary 



pouch of ligula. 

 v, transverse or V-shaped suture on surface of mesonotum 



or metanotum, formed by the internal V-shaped 



ridge or "entodorsum" (VNR). 

 w, lateral lobe of pronotum projecting posteriorly over the 



first spiracle. 

 x, thoracic plate lying laterad of anterior part of sternum, 



often regarded as a part of presternum. 

 y, accessory sclerite of fourth axillary (4 Ax) of front wing, 



affording insertion for slender muscle (cc) attached 



below to common apodeme of mesosternum and 



metasternum. 



2, coxal condyles of mesothoracic and metathoracic sterna, 



