1983] 
Willey & Brown — Genus Myopias 
285 
observations to confirm this interesting possibility and to learn the 
details of the M. delta behavior and ecology. 
The name delta refers to the triangular mandibles. This species 
cannot easily be placed to species group, and the mandibular form 
even puts generic assignment into doubt. The 3-merous palpi (both 
sets) and the upturned tooth on each labral lobe probably are 
derived characters shared with the tenuis group, so the triangular 
mandibular shape may well be secondarily derived from the 
Myopias plan; it seems, indeed, that the dentition of M. delta is 
more easily homologized with that of various Myopias species than 
it is with the run of Pachycondyla groups. It thus becomes doubly 
important to find again the larvae of M. delta. 
