HYMENOPTERA . 
055 
Family MlMESIDiE (Mi-mes'i-dae). 
The Mimesids (. Mi-me'sids ). 
The Mimesids are small digger-wasps in which the base 
of the abdomen is slender, forming a petiole 
much like that of the Sphecids, but differing in 
being flattened and usually furrowed above 
(Fig. 780). These digger-wasps are much 
smaller than the true thread-waisted wasps. 
Less than a score of North American species 
are known. They make their burrows in 
the pith of brambles, and provision them FlG * 78 °sid. A M,me 
with Aphids or Psyllids. 
Family PEMPHREDONID/E (Pem-phre-don'i-dae). 
The Peniphredonids {Pem-phre-do’nids). 
Most of the species of this family are slender insects, of 
small size and shining black color. They can be distin- 
Kig. 782. 
guished from the closely-related families by the 
presence of two, and only two, closed submarginal 
cells (Fig. 781, 2d III -(- III B and III 4 ). It is a 
small family, including scarcely a dozen North 
American species. 
The Pemphredonids usually burrow in the pith 
of dry branches and provision their burrows with plant-lice. 
