1907] Barth, Xcfttiiu/ Hahifs of (iort/lcs caiiaHcuIatus. 149 
NEST NO. 5. 
Julv 20th, 1907. Wasp came at 10:27:00 a, m.. with a 
liopper. Left at 10 : 27 : 40. after carefully closino- the entrance. 
Returned at 11:16:20 with a hopper. Entered at 11:16:35. 
after rcstinj^- ahont a foot from tlie nest. Came out at 11:17:15 
and flew away at 11 : 17:30, with no locality study. 
Rain set in at noon and continued all the next day, and as I 
was compelled to return to the city on an early train, July 22nd, 
this closed my observations. 
GENERAL REMARKS. 
The prey of the wasp seems to be exclusively leaf hoppers of 
the species Cyrtolobus feiicsfratns Fitch and Atyma iiioniafa 
Say in all stages from the nympth to the adult as found in the 
cells. They were not closely packed and lay at all angles to each 
other as though carelessly thrown into place. None of the hop- 
pers responded to stimulation with fingers or forceps, so pre- 
sumably the\' were stung to death. 
In all cases the entrance was opened just sufficiently to allow 
the wasp to slip in and careful watching failed to give any evi- 
dence of a shifting of hold on the prey as the wasp carried it in. 
This was carried tightly grasped about the neck or anterior 
thorax by the middle legs and, whether the wasp walked or flew, 
was never dropped. The wasp always entered the cell head 
foremost, carrying the hopper with her. The entrance was com- 
pletely closed when the wasp left, the little work required to pro- 
duce this being due to tlie small oj^ening which the wasp made 
to enter, this being often but one-half of the actual size of 
the door. 
The quickness with whicli the insects were able to return with 
prey was due no doubt to a plentiful supply in the densely over 
grown ravine close by. as the wasps seemed invariably to go and 
come from that direction. The presence of an observer seemed 
to have no disturbing influence on lier actions, as very frequently 
I sat within a few feet of the nest with an umbrella over my liead 
for protection against tlie lieat of the sun. 
