89 
next afternoon, March 9th, at 2:05, the cell had been sealed up. 
I watched this nest for two weeks thereafter, but there was little 
work added. She probably considered her cell-group sufficiently 
large and would be content to see her brood hatch and perhaps 
use over again the cells thus made vacant. 
I have found Macromeris nesting well in the forest at an alti- 
tude of perhaps 1000 feet. Here. one was seen gathering cell 
material from a standing tree trunk 100 feet from her nesting 
site. She, however, was quite shy. Her single capped cell was 
well ensconced in a natural hollow formed by the root and but- 
tresses of a large tree. 
Sometimes a male is to be found in 
the nests. He is tolerated by the fe- 
males, often perched for long periods 
on a cell, as he parades about with ele- 
vated wings. -One of these males I 
found badly crippled, two of his legs on 
one side being lacking. 
The wasp may search in quite con- 
fined quarters for the large spider ; this 
shows that she does not fear it much. 
Occasionally one finds this spider in 
Fig. 39. M. violacea cell close proximity to a wasp’s nest and 
viewed from beneath, Jacking much of its great activity, sug- 
een Mere gcouve that Macromeris had stung it 
ee arall Size: but not sufficiently. She may tolerate 
small gecko lizards in her nest hollow, 
though I have seen her rout, by a quick dash, a greenish tree 
lizard. 
Evidently other wasps than Macromeris prey upon the big 
Heteropoda spider. A Salius sp., an insect fully as large as 
Macromeris, but with black and orange wings, and much like 
Pepsis formosa, or the “Tarantula Hawk” of the West and South- 
west United States, was once seen hunting for a spider which 
she had flushed in the neighborhood of a Macromeris nest. At 
intervals Salius would fly about the Cordia tree to alight and pur- 
sue usually a definite set of trails, and as one of these led very 
close to the interior of the Macromeris hollow, one of its denizens 
would frustrate the strange wasp’s venture into the forbidden 
ground by rushing fiercely out and compelling flight. 
The cells of Macromeris are fairly uniform, being on the aver- 
age 33 millimeters long by 20 wide and 20 in height. Their form 
is shown in Figs. 39 and 41. Externally the walls are rough, with 
the cap smoother, and the interior still smoother. 
The egg is deposited on the underside of the spider’s abdomen 

