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beetles and contained also a quarter-grown wasp larva, while the 
other held the mother wasp and 17 beetles. The beetles were of 
eight species—Anthribidae, 1 species; Curculionidae, 1, and 
Chrysomelidae, 6, the last comprising the bulk of the store. 
The larva is of the same general type as that of the preceding 
species. 
Later on I dug up another nest and secured five dull brown 
baggy cocoons of weak texture. A pupa secured from one of 
these measured 11.5 mm.; it had a broad head bearing in the 
middle of the vertex a porrect, forked finger-like process; the 
thorax and appendages were stout, the legs being rather spinous, 
while the comparatively slender abdomen was provided with sub- 
dorsal and lateral processes. 
VESPIDAE. 
Eumeninae. 
Here belongs a very large assemblage of wasps related to the 
social species, and while the Eumeninae have but two phases 
(male and female), it is also true that sometimes, as in the lower 
Vespinae, the third caste or differentiated egg-laying female or 
queen cannot be distinguished. 
The Eumeninae vary considerably in form—there are the thick- 
set Odynerus and the slender species of Ewmenes. Some are over 
an inch in length. Most of the species whose nesting habits are 
known use clay for making cells, and while a large number employ 
this material merely to partition off cells in some suitable cavity, 
as the hollow in a twig, a deserted mud-dauber nest, etc., 
many build their own nests of mud. Among the latter are 
the jug-making Ewmenes or “Potter Wasps.” Fabre, Dutt, Hart- 
man, Cretin and Howes give good accounts of the nesting habits 
of wasps of this genus. Some of the Odynerus build mud cells, 
others use pre-existing hollows, while many dig their own neat 
burrows, over the entrance to which they may or may not con- 
struct a clay tube. Isely (1913) gives excellent accounts of the 
life-history of some of the Kansan Odyneri. A few tropical 
wasps of the Zethus group make nests of pieces of leaves. 
Caterpillars practically always are stored in the cells. In a 
few cases sawfly and chrysomelid beetle larvae are used. The 
egg is usually suspended from the ceilmio sof the) cell bynva 
filament. On one occasion I saw a very small species of Philip- 
pine Eumeninae hunting caterpillars on the leaves of a shrub. A 
wily caterpillar hanging from her thread dropped part-way to the 
ground. The wasp appeared conscious of this trick and began 
an extended search for the caterpillar, circling again and again 
