151 
The wasp may often be seen hunting for caterpillars, and her 
actions are then much like Odynerus, to which genus she is closely 
allied and sometimes even included therein. The provender, an 
active green larva, nests in seeming security in a leaf, a portion 
of which it rolls up and fastens THES with silk. I observed the 
wasp examining the leaves of a weed (Amarantus sp.). With 
alert antennae she would alight on a curled leaf, bite first into one 
end and then the other, and wheel about swiftly in fear that the 
uneasy occupant would escape. She did not sever the silken guys, 
but bit holes through the leaf and at an opportune moment 
hauled out, stung and carried away the unfortunate larva. 
Several caterpillars are placed in one cell and a plug of mud 
plastered over the aperture. The egg is suspended by a filament. 
The wasp is an indefatigable worker, starting the day early and 
sometimes laboring until so late an hour that in the approaching 
dusk she has difficulty in locating her cell. 
Stilbum, no doubt, and other Chrysididae are often household 
insects and probably one of the worst parasitic enemies of 
Rhygchium. 
Odynerus luzonensis Rohwer. 
Length 8 mm; black, with yellow marks 
I found a single burrow of this insect; 1t extended obliquely 
into the side of a small termite mound. <A short earthen tube 
was the entrance, and the single terminal cell contained a stout 
well-grown Odynerus grub and five rather dark-green larvae of a 
lycaenid butterfly. The grub spun up and successfully passed 
its transformations. 
Odynerus vespoides Williams. 
Length 10-11 mm.; black, with seven abdominal bands of yellow. 
This yellow and black wasp (Fig. 81) appears to be rather an 
uncommon insect and a denizen of the forest. On August 27, 
1917, I saw a vespoides in the lower Makiling forest sealing up 
her nest. She had used as a cell a short gallery, apparently an 
old beetle boring in the upper surface of a fallen tree trunk. This 
contained three or four small moth larvae, and was sealed up flush 
with the surface of the trunk, with a very sticky tree gum of some 
sort, which was apparently impervious to the heavy forest rains. 
