260 
Psyche 
[Vol. 90 
Fig. 4, Myopias concava, head of worker paratype in full-face view. Scale bar is 0.5 
mm. 
tooth, and a distinct but rounded basal angle. Oblique groove at 
base continued as a broad lateral-marginal groove (strix) to apex. 
Median frontal sulcus of head extends to or nearly to posterior 
quarter of head length. Scapes gently curved, moderately incrassate 
apicad, overreaching posterior border by more than their apical 
width when head is viewed full-face. Funiculus relatively slender, all 
segments longer than broad; apical segments not forming a club; 
