152 Bulletin Wisconsin yatural Historif Society. [Vol. 6, Xos. 3-4. 
shape and are stored with from four to seven adult Lygus pratcn- 
sis Linn. In one of the nests ( No. 7) the pecuHarity of two entran- 
ces was offered, they being about two centimeters apart, the gallery 
of the one two and a half, of the other, three and a half centimeters 
long. They then met and continued as one gallery for the re- 
mainder of the nest. I can offer no explanation of this unless it 
happened by accident as no stone or other obstruction existed be- 
tween the two entrances. Long and careful watching showed 
that but one insect occupied the nest. In her work of excavation 
this insect always entered through the longer gallery and always 
came out through the shorter with her load. Possibly the original 
entrance to the nest was closed by a disturbance of the sana abc»ut 
it and the returning wasp, not finding the door where she knew 
it ought to be, started a new nest in the immediate vicinity and, 
guided by a nest odor, dug in the direction of the old gallery till 
a connection with the old nest was formed. Her activities in the 
nest may then have caused the barrier in the old door to cave in 
and. consequently, a re-opening of the original entrance. In a 
number of cases where the nest had been filled with the plaster 
cream but not immediately dug out, the owner of the nest at oiicc 
started a new tunnel beside the rather large cap of hardened 
plaster which is formed on the surface after the nest is full, which 
tunnel proceeded directly in line and close beside the plaster cast 
of the old gallery. 
The time which the wasp takes to capture and return with its 
verv- common prey is comparatively short, as could be expected 
since it is found abundantly on almost any of the flowering plants. 
The following observations will serve as an example of the dura- 
tion of the himting expeditions : — 
Left at 10:37. Returned at 10:39:10 with prey { 2 min. 10 sec.) 
Left at 2:48. Returned at 3:4 with prey (16 min. ) 
Left at 3:5:40. Returned at 3:14:30 with prey (8 min. 50 sec.) 
Left at 3:16. Returned at 3:28:10 with prey (12 min. 10 sec.) 
Left at 3:30:20. Returned at 3:38 with prey (7 min. 40 sec.) 
The bug is firmly pressed into the concavity of the abdomen 
and against the thorax by the middle and hind legs, the abdomen 
being curved down over it. This makes it rather difficult to 
decide whether she is carrying or not. Without halt she darts 
directly into the entrance giving the impression of a tumbling down 
the gallery. Whether the prey is shifted was not determined 
as her disappearance into the nest was too rapid for such ober- 
vation. In this she very much resembles Crahro crraus. also a 
ground digger belonging to the Crabronid^e. None of the cap- 
