220 Annals Entomological Society of America [Vol. IX, 



EXPLANATION OF PLATES X AND XL 



All figures except diagram 21 are from camera lucida drawings made at the 

 base of the microscope. The figures are enlarged as follows: 1, X 78; 2 to 7, X 280; 

 8 to 19, X 875; 20, X 350. 



ABBREVIATIONS. 



a — group a of pores on proximal end of tibia, 

 am — ampulla. 



artm — articular membrane, 

 b — group b of pores on distal end oi femur, 

 bs — blood sinus. 



c — conducting tube of gland with reservoir. 

 Ci — conducting tube of gland without reservoir, 

 ch — chitin of beetle recently emerged, 

 chi — chitin formed before beetle emerges. 

 ch2 — chitin formed after beetle emerges, 

 ct — connective tissue, 

 cyt — cytoplasm, 

 c — efferent tube, 

 f — femur. 



glc — gland cell with reservoir, 

 glci— gland cell without reservoir, 

 h — hypodermis. 



.hi — membrane dividing lumen of leg into two chambers, 

 he — hypodermal cell, 

 hnuc — hypodermal nucleus, 

 hr — hair, 

 m — muscle fiber. 

 n — nerve. 



nuc — nucleus of gland cell, 

 nucl — nucleoli of gland cell, 

 olp — olfactory pore, 

 p — pore with reservoir. 

 Pi — pore without reservoir, 

 pc — pore canal. 



pr — process of young gland cell, 

 r — reservoir, 

 sc — sense cell, 

 sf — sense fiber, 

 sk — socket of hair, 

 tb — tibia, 

 thr — tactile hair, 

 tr — trachea. 



Figures 1 to 8 inclusive are superficial views of external ends of hypodermal 

 gland pores of Epilachna boreal is. 



