EXPLANATION OF SYMBOLS AND LETTERS. 



141 



1. SYMBOLS. 



A, 



AcGl, 



AGl, 



AGIO, 



An, 



ANP, 



ANR, 



Ant, 



AntL, 



AntNv, 



Ao, 



Ap, 



Ai)h, 



Ax, 



ax, 



AxC, 



AxM, 



B, 

 BG, 



be, 



BCpx, 



BGl, 



BM, 



Br, 



IBr, 



2Br, 



SBr, 



Brh, 



BW, 



C, 



Cb, 



CC, 



Cd, 



Cer, 



CL, 



Gl, CIS, 



Cla, 



Glp, 



Clsp, 



IClsp, 



2Clsp, 



Com, 



Cor, 



Ctl, 



Cu, 



anal vein ; lA, first anal, 2A, second anal. etc. 



accessory gland of male reproductive organs. 



acid gland of sting, opening into poison sac (Psntic). 



duct of acid gland of sting. 



anus. 



anterior wing process of notum. 



anterior marginal ridge of notum. 



antenna. 



antennal lobe of brain. 



antennal nerve. 



aorta. 



apodeme, any internal chitinous process of body-wall. 



anterior pbragma of any tergum, prepbragma. 



tbe axillaries or articular sclerites of tbe wing base, designated 



individually as lAx, 2Ax, 3Ax, and ^Ax. 

 accessory axillary sclerites of irregular occurrence in connection 



witb tbe principal axillaries (Ax). 

 axillary cord, or ligament-like tbickening of i)osterior edge of basal 



membrane of wing, attacbed to posterior angle of scutellum. 

 axillary membrane, the tbin membrane of wing base, containing 



tbe axillary sclerites and forming in some cases tbe lobes called 



alulae, 

 bulb (bulb of penis or of sbeatb of sting). 

 body-cavity, 

 any particular part of body cavity such as that prolonged into tbe 



mouth parts, legs or pieces of the sting. 

 bursa copulatrix. 

 alkaline gland of sting, 

 basement membrane, 

 brain. 



protocerebrum. 

 deutocerebrum. 

 tritocerebrum. 

 barb. 



body-wall. 



costa, first vein of wing. 



pollen basket or corbiculum on hind tibia of worker, 

 crystalline cone of compound eye. 

 cardo. 

 cercus. 



crystalline lens of compound eye. 

 ceil, cells, 

 claw, 

 clypeus. 

 clasping lobes of ninth segment of male, perhaps equivalent to the 



four gonapopbyses of ninth segment of female, 

 upper or outer clasper. 

 lower or inner clasper. 



commissure (of either nervous or tracheal system), 

 cornea. 



cuticle, the chitinous layer of tbe epidermis, 

 cubitus, fifth vein of generalized wing. 



