1983 ] 
Willey & Brown — Genus Myopias 
251 
tween the most distal apex of the closed mandibles and the 
anterior edges of the frontal lobes, as seen in same (dorsal 
full-face) view from which HL is taken. 
Ml (mandibulo-cephalic index) ML X 100/ HL. 
MLO (mandibular outside length) maximum absolute chord 
length of left mandible measured from lateral insertion to 
apex. 
CLL, (length, width of median clypeal lobe) as measured in dorsal 
CLW full-face view. 
SL (scape length) chord length of antennal scape, excluding 
radicle. 
SI (scape index) SL X 100/ HW 
EL (eye length) maximum measurable length of facetted part of 
eye. 
WL (trunk length) diagonal length of trunk as measured from 
side view, from anterodorsal slope of pronotum (excluding 
cervix) to most posterior extremity of propodeum. 
Myopias gigas, new species 
(Figures 1, 12) 
Diagnosis, worker: A very large species of the M. loriai group, 
even larger than M. loriat, with proportionately longer mesonotum 
and petiolar node, and with the head dorsally, trunk dorsum and 
pleura of posterior section of trunk sharply and regularly striate; 
body otherwise prevailingly smooth and shining. Funicular segment 
II very long, longer than I. 
Worker, holotype: TL 16.9, HL 2.50, HW 2.60 (Cl 104), ML 2.26 
(MI 90), SL 2.62 (SI 101), EL 0.45, WL 4.61, petiole L 1.7, hind 
femur L 3.7, hind tibia L 3.16 mm. 
This, the largest known species of Myopias, has the broad, poste- 
riorly narrowed head of the loriai group; long, slender, curved 
mandibles and rather large eyes with many fine facets. A scape, 
when held straight back as seen in full-face view, surpasses the 
posterior border of the head by nearly IVi times the apical scape 
width. The posterior border of the head is transverse and nearly 
straight, varying from very feebly concave to subsinuate in slightly 
different views. As in M. loriai, the median clypeal lobe is apically 
biconvex, with a shallow median notch; the lobe is shorter and 
broader than in M. loriai, and tapers slightly from base to apex. 
