1942] 
A N europterous Myrmecophile 
3 
cal cocoon 5.5 x 7 mm. The latter was a light straw 
yellow in color and firmly affixed by yellow threads to crum- 
pled blue paper which covered absorbent cotton. From an 
even horizontal break or cut in the case one millimeter from 
an end the imago had emerged. 
Camponotus abdominalis is widespread and abundant in 
the Neotropical Region. The colonies are often very popu- 
lous while the workers and soldiers are among the most 
aggressive of ants, the latter inflicting painful bites. The 
present nesting site is not unusual. I found these ants 
nesting in Trinidad in such places as old cacao pods, Nasuti- 
termes nests (termite-inhabited or not), a disused teapot, 
a writing desk and a gentleman’s cabbage walking stick. 
There are some aspects of the relationships between this 
ant and the Nadiva larvse which would repay study and 
which could not be worked out in view of the circumstances 
described above. How were the guests adopted? How do 
they obtain food? Perhaps, after in some manner acquiring 
the ant nest odor, the larvse were adopted. Or were the 
eggs laid in the ant nest? The young larvse might have 
been active and elusive enough to escape the first attacks 
of the ants and would soon acquire the nest odor. In view 
of the known predatory habits of Neuroptera larvse it would 
not be surprising to find that they fed upon the brood of 
their hosts. The larvse are covered with short, stout hairs 
but with nothing resembling trichomes so what they could 
give the ants in return is unknown. 
