230 
Psyche 
[Vol. 88 
Melber, A., and G. H. Schmidt 
1977. Sozialphanomene bei Heteropteren. Sonderdruck aus Zoologica. 127: 
19-53. 
Natrella, M. G. 
1963. Experimental Statistics. National Bureau of Standards Handbook 91. U. 
S. Govt. Printing Office, Washington. 
Nault, L. R., T. K. Wood, and A. M. Goff 
1974. Treehopper (Membracidae) alarm pheromones. Nature 249: 387-388. 
Sheeley, R. D. and T. R. Yonke 
1977. Biological notes on seven species of Missouri tingids (Hemiptera: 
Tingidae). J. Kansas Entomol. Soc. 50: 342-356. 
Torre-Bueno, J. R. 
1935. Notes on Gargaphia tiliae. Bull. Brooklyn Entomol. Soc. 30: 78. 
1942. Maternal solicitude in Gargaphia iridescens Champion. Bull. Brooklyn 
Entomol. Soc. 37: 131. 
Weiss, H. B. 
1919. Notes on Gargaphia tiliae Walsh, the linden lace-bug. Proc. Biol. Soc. 
Wash. 32: 165-168. 
Wood, T. K. 
1974. Aggregating behavior of Umbonia crassicornis (Homoptera: Membra- 
cidae). Can. Ent. 106: 169-173. 
1976a. Alarm behavior of brooding female Umbonia crassicornis (Membra- 
cidae: Homoptera). Ann. Entomol. Soc. Amer. 69: 340-344. 
1976b. Biology and presocial behavior of Platycotis vittata (Homoptera: Mem- 
bracidae). Ann. Entomol. Soc. Amer. 69: 807-811. 
1977. Role of parent females and attendant ants in the maturation of the 
treehopper, Entylia bactriana (Homoptera: Membracidae). Sociobiol- 
ogy 2: 257-272. 
1978. Parental care in Guayaquila compressa Walker (Homoptera: Membra- 
cidae). Psyche 85: 135-145. 
