130 THE PERIODICAL CICADA, 
Hemiererous ENEMIES. 
A few predaceous Hemiptera were found associated with Cicada 
eggs under such circumstances as to leave little doubt but that they 
were subsisting on them. Among these were two species of Thrips, 
which were found both in the larval and adult stages in several 
instances about the eggs on 
which they had been feeding. 
The material that has been 
preserved of these Thrips is 
not now in condition to be 
worked up. Both species are 
probably undescribed. 
HyMeENorPreROoUS ENEMIES. 
The hymenopterous  ene- 
mies of the Cicada comprise 
Vie. 53.—Egg parasite, Lathromeris cicadx: a, female; a number of ese parasites, 
b, abdomen of male; c, antenna of male; d, antenna of which are the more unportant 
female. All greatly enlarged (original.) : : Cee Cyne ee 
agencies in limiting the num- 
bers of the insect, and the large digger wasp already mentioned. 
The fact that the eggs and the newly hatched larve are much sought 
after by various species of ants was early commented upon, Doctor 
Potter stating that they are constantly infested by legions of ants, 
both before and after they are 
hatched. He says: 
Even the little red species, the most 
diminutive of the race, will shoulder the 
eggs and the young and bear them off 
to their cells. Inall our researches we 
found them in battalions systematically 
arrayed for wholesale plunder and de- 
vastation. 
Doctor Smith corroborates 
Professor Potter, stating that he 
has himself observed a small red 
ant, scarcely as large as its in- 
tended victim (a young Cicada 
lat NE ); sees the latter, shoulder Fic. 54.—Female Sphecius carrying a Cicada to her 
nibs and start off ata great speed. burrow. Natural size (after Riley). 
THE PARASITES OF THE EGGS. 
Several egg parasites were reared from the eges of the Cicada, but 
with one exception were not abundant in the course of extensive 
breedings. Single individuals were secured of a mymarid, a tricho- 
