THE PHILIPPINE WASPS OF THE SUBFAMILIES 
SCOLIINAD AND ELIDINA 
By S. A. ROHWER 
Honorary Custodian of Hymenoptera, United States National Museum 
Subfamily SCOLIIN 4 
The wasps of the subfamily Scoliinzee can be easily distin- 
guished from their allies by the simple claws, the deeply emar- 
ginate inner margins of the eyes, the presence of only one 
calearium on the intermediate tibia, the three spines on the 
male hypopygidium, the highly specialized tongue, and the 
general appearance. All of the species whose habits have been 
recorded prey on soil-inhabiting larve of Coleoptera, and some 
of them (as, for example, Scolia manilae) have proven to be of 
great value in reducing these coleopterous pests. 
Key to Philippine genera of Scoliinz. 
1. Front wing with only two discoidal cells, the second recurrent being 
entirely wanting. Scolia Fabricius. 
Front wing with three discoidal cells, the second recurrent present.... 2. 
2. Second recurrent uniting with the first recurrent and not joining the 
cubitus Liacos Guérin. 
Second recurrent uniting with the second abscissa of the cubitus. 
Campsomeris Lepeletier. 
Genus SCOLIA Fabricius 
In the tabulating of the species of the genus Scolia I have ac- 
cepted the current method of dividing the genus into two sub- 
genera by the presence or absence of the second intercubitus (two 
or three closed cubital cells). This method of classifying the 
species often separates forms which are otherwise closely allied, 
and it seems that future work on the classification of these wasps 
will devise a more natural system by the use of body characters. 
The older writers paid but little attention to the structural de- 
tails; and without a large collection, which contains at least 
most of the described species, it will be impossible satisfactorily 
to arrange these insects by any system other than the one they 
adopted. The clypeus, antennez, pronotum, propodeum, first 
tergite, and pygidium offer useful characters, to say nothing of 
the shape of the head and the valuable suggestion of natural 
groups indicated by antigeny. 
75 
