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Mexico south to Costa Rica, many Caribbean islands. Uncertain whether native in Costa Rica.
In Costa Rica this is a moderately common species in disturbed areas in the seasonally dry northwest portion of the country. I have collected it in Santa Rosa National Park, where I observed workers recruiting to a dead grasshopper on an asphalt road. I also have records from Curu on the Nicoya Peninsula and La Pita on the road from the PanAmerican highway to Monteverde. I have never found a nest of the species.
This species is similar to M. compressumHNS and, to a lesser extent, to M. cyaneumHNS. A characteristic that appears to separate it from similar species is the petiolar profile, which in frontal view is flat to weakly concave.
Found most commonly in these habitats: 2 times found in littoral scrub, 1 times found in scrubby 2nd growth, 3 times found in disturbed semi-moist woodland, 1 times found in secondary broadleaf forest, 3 times found in mature wet forest, 1 times found in scrub forest, 2 times found in 2nd growth dry forest, 2 times found in 2º wet forest, 2 times found in abandoned garden, 1 times found in agricultural area near forest, ...
Found most commonly in these microhabitats: 11 times ex sifted leaf litter, 4 times at bait, 1 times on treetrunk, 1 times nest under bark of pine tree, 2 times 3 dog site, 1 times Sweep sample of roadside vegetation., 1 times hollow under limestone rock, 2 times foragers in sand, 1 times Dry forest. Strays from first site., 1 times beating vegetation, 1 times at dead grasshopper on road, ...
Collected most commonly using these methods: 7 times hand collecting, 7 times search, 4 times Winkler, 4 times hand collection, 3 times bait, 4 times MiniWinkler, 0 times At bait, 2 times MaxiWinkler, 1 times baiting, 0 times On tree trunk, 1 times Decaying Vegetation, ...
Elevations: collected from 2 - 1560 meters, 276 meters average