Table 1. Census history of cicada nymphal skins in legume tree plots* in the forest ravine, “Cuesta Angel”, near Cariblanco, 
Heredia Province, Costa Rica. 
1980] 
Young — Ecology of Cicadas 
187 
w <3 
<D ^ 
c *c: 
a o 
a to 
c c 
O O O O 
O O <N O O O O 
Tf — O O — O 
O rM O O 
O r’b m O O O — r- — Tf — m 
0 — 00 
O O O O <N O O 
or- — ornniTj-oomo 
— — Tt0I^-0^v~>0 
§3 ~g 
£ s; 
a, *5 a. 
a <3 53 
be be be 
c c c 
(NmTt^ot^oooNO 
O O 
+1 
O'- Qv 
— CN 
+1 
+1 
m in 
rn \o 
O O 
+1 
— nj 
+1 
m r- 
r- p 
<n — 
— <N 
+ 1 
*Each plot ranged in size from 5X5 meters to 10X9 meters around the base of individual legume trees. 
**A11 trees and cicadas were censused 18-20 April, 22-25 May, 4-7 July, 15 August 1973 (total of 14 days), except for trees9, 10, 
1 1, and 12, which were added to the census program on 4 July 1973. 
