210 SEVENTEENTH Report STATE ENTOMOLOGIST OF MINNESOTA—1918 
Geol, jand Nat! Hist. Survey. Bull. No: 2, Sct“ Series: Novel whos 
Fabre’s observations on Calicurgus see p. 157 “The Life and Love of 
the Insect.” See also quotations from Fabre on pp. 101, 102, 103 Vol. 
Vi; Camb. Nat. History. 
Perez states that when Pompiloides has obtained a spider to provi- 
sion its nest, it is sometimes pursued by Ceropales, another Psammo- 
NG 
Fig. 100 (Psammochares) Episyron biguttatus Fab. 
charid, which lays an egg on the spider, thus providing food for its own 
young. 
The following occur in Minnesota (Pompilus) Psammochares 
argenteus Cress.; (P.) P. tenebrosus Cress.;(P.) P. scelestus Cress.; 
(P.) P. luctuosus Cress.; (Psammochares) Episyron biguttatus Fab., 
Agenia sp. Psammochares sp. taken in Rock Co. in Sept. and Crypto- 
cheilus in Itasca Co. in Aug. 
EUMENIDAE 
Wings always present and folded longitudinally in repose; claws dentate; two 
forms, males and females; middle tibiae with one or two apical spurs. 
These are solitary, predatory wasps storing their cells with vari- 
ous kinds of insects. They may bore in pith or in wood, or make mud 
nests. It is the only family of solitary wasps whose members fold 
their front wings longitudinally as social wasps do. 
The common so-called “potter wasp” Eumenes fraterna occurs 
here. It attaches its graceful vase-like mud nests, frequently 
with small stones imbedded in the wall, to low plants and 
