64 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 



In connection with the receptors the scent-producing organs and the 

 phenomenon of reflex " bleeding " were studied. The only scent- 

 producing organ found was the unicellular glands, which are dis- 

 tributed over the entire body surface. The bean beetle, like other 

 coccinellids, is well supplied with these hypodermal glands. The chief 

 purpose of the secretion is that of protection, but it probably also aids 

 the beetles in recognizing the different individuals and sexes of the 

 same species. When disturbed the adults eject small drops of a 

 glandular secretion from the f emoro-tibial articulations. This is called 

 reflex " bleeding." The larvae of the bean beetle also protect them- 

 selves in a similar manner. When they are handled or even touched 

 the yellowish and bitter " blood " exudes from ruptures at the bases 

 of the hairs, which terminate the branches on the tubercles. 



LITERATURE CITED 



( 1 ) Anonymous 



1923. Promising wireworm bait found. Official Record, July 18, p. 3. 



(2) 



1923. A promising new bait. Fla. Entomologist 7:24. 



(3) 



1927. Geraniol fatal lure to beetles. Official Record 6:8, Jan. 5. 



(4) Ballou, C. H. 



1929. Effects of geranium on the Japanese beetle. Journ. Econ. Ent. 



22:289-293, 4 pis. 



(5) Barreto, B. T. 



1923. El gusano taladrador del tallo y otros insectos daninos a la cana 



de aziicar. Segunda parte Los gusanos blancos. Agricultura, 

 Sanitago de las Vegas i (3) •.2-2. 



(6) Borodin, O. 



1914. [Measures against elaterid larvae.] In Russian. [Chutorianin.] 

 Poltava, no. 12, p. 382 (Rev. Appl. Ent. A, 2, pt. 6:344). 



(7) Breitenbecher, J. K. 



1918. The relation of water to the behavior of the potato beetle in a 

 desert. (See "The Mechanism of Evolution in Leptinotarso," 

 by W. L. Tower), Carnegie Inst. Pub., no. 263, pp. 341-384, 

 illus. 



(8) Campbeu., R. E. 



1924. Notes on injurious southwestern Tenebrionidae (Col.). Ent. 



News 35:1-7. 



(9) Collins, D. L., and Ni.xon, M. W. 



1930. Responses to light of the bud moth and leaf roller. N. Y. Agr. 



Exp. Sta. (Geneva) Bull. 583, 32 pp., 23 figs. 

 (10) COOLEY, R. A. 



1917. The spinach carrion beetle, Silplin hituhcrosa, Lee. Journ. Econ. 

 Ent. 10:94-102, I pi. 



