142 
along in a haphazard manner, and I found in the stored cells 
neither eggs nor larvae. 
The paralyzed inmates were a curious lot of short-winged 
wood crickets (Fig. 71), possessed of ex- 
tremely long antennae. The cells occu- 
pied by cocoons contained sawdust; the 
cocoons shaped just like those of Noto- 
gonidea and Larra, 1. e., bluntly oblong 
and thickest above the middle. They were 
formed of fine sawdust, and were fairly 
tough, moderately smooth outside and ap- 
parently varnished within. They measured 
10-15 mm. long by 4.5-6 mm. thick. The 
greater number contained pupae, a large 
one of which measured 14 mm. long and 
was shaped much like the adult insect, but 
the abdominal segments 2 to 5 bore trans- 
verse subdorsal tooth-like ridges and there 
were on each side about four simple lat- 
eral tubercles. A wasp under observation 
Fig. 71. Calyptotry- required about a day and a halt, after be- 
pus sp. prey of H. coming freed of the pupal envelope, to ac- 
Mandibularis. En- quire its full strength. Evidently a brood 
larged: of these wasps was emerging from this 
colony, the only locality in which I secured the insect. 
Se 

Trypoxyloninae. 
These comprise slender wasps with a short neck and thorax 
and a long club-shaped abdomen (except in Pison). 
They usually prey on spiders, and all to some extent use mud 
for nest-building. There are those that are true mud-daubers and 
construct neat cells: most species, however, are content to find a 
hollow of some sort, an empty Sceliphron cell, a broken reed, a 
bamboo or bramble hollow, where they partition off cells with 
mud discs. According to Bodkin (1917), T. brevicarinatus Cam. 
of British Guiana usually forms her nest beneath a palm leaf and 
may cement together as many as 25 cells. TJ. albitarse in the 
United States is a large black species which also makes entire 
mud cells. Many species are noted for the lavish space they ap- 
portion out for each cell. Howes (1917), who induced 7. cinerco- 
hirtum to build in glass tubes, ea that the female half par- 
titioned her several cells, thus when stored enabling her to lay 
her eggs all on the same day. The cells subsequently are com- 
pletey closed. He found that the male takes some interest in 
the nesting activities, and while not performing any of the manual 
