Colony;"Head length to end of nasus";"Head width (max.)";"Pronotal width";"Hind tibia length" "MX23 (n=3)";1.44–1.52;0.80–0.82;0.42–0.46;0.94–0.96 "MX99 (n=2)";1.50–1.52;0.88–0.92;0.44–0.45;0.92–0.93 "MX572 (n=8)";1.34–1.46;0.72–0.80;0.44–0.46;0.89–0.96 Range;1.34–1.52;0.72–0.92;0.42–0.46;0.89–0.96 Mean;1.43;0.80;0.45;0.92