456 N. E. MCINDOO. 



Hochreuther, Rudolf. 



'i2 Die Hautsinnesorgane von Dytiscus marginalis L., ihr Bau und ihre Ver- 



breitung am Korper. Zeitsch. f. wiss. Zool., Bd. 103, pp. 1-114. 

 Lehr, Richard. 



'14 Die Sinnesorgane der beiden Fliigelpaare von Dytiscus marginalis. Zeitsch. 



f. wiss. Zool., Bd. no, Heft, i, pp. 87-150, with 45 text figs. 

 Mclndoo, N. E. 



'14a The Olfactory Sense of the Honey Bee. Journ. Exp. Zool., Vol. 16, no. 3, 



April, pp. 265-346, with 24 text figs. 

 '14b The Olfactory Sense of Hymenoptera. Proc. Phila. Acad. Nat. Sci., 



Vol. 66, pp. 294-341, with three text figs, and 2 pis. 

 '14c The Olfactory Sense of Insects. Smithsonian Misc. CoUec, Vol. 63, 



no. 9, Nov. (Publication 2315), pp. 1-63, with six text figs. 



EXPLANATION OF PLATES I. AND II. 



All figures including Text-figs, i and 2 are from camera lucida drawings made at 

 the base of the microscope. Figures i to 8 inclusive and 22 on the plates are 

 enlarged 465 diameters. All the remaining figures on the plates, except the dia- 

 grams 28, 29 and 31, are enlarged 580 diameters. 



Abbreviations. 



■ BlSin blood sinus. 



BM basal margin of elytron. 



C costa. 



Ch chitin. 



Ch\ chitin formed before insect emerges into imago stage. 



Chi chitin formed after insect emerges from last pupal stage. 



ChM chitinous membrane of pore plate. 



CM cup-shaped membrane of tactile hair on antenna. 



Con chitinous cone. 



ConT connective tissue. 



ConTNuc. . . .nucleus of connective tissue. 



Cx coxa. 



F femur. 



Fl flange of olfactory pore. 



Fo where wing folds. 



GIC gland cell. 



HFPg hollow pit peg on antenna. 



Hr hair. 



Hyp hypodermis. 



Hypi membrane resembling hypodermis which divides the lumen of proxi- 

 mal end of the tibia of Epilachna into two chambers. 



Hype hypodermal cell. 



HypNuc hypodermal nucleus. 



Hyps hypodermal secretion. 



M muscle. 



MD muscle disk. 



Me media. 



Mo mouth of pore. 



