|12.In profile petiole short and subcylindrical, lacking an anterior peduncle and with node rudimentary (often absent); ventrolateral margin of head delineated by a sharp longitudinal carina on each side. The carina starts close to the inner ventral mandibular base, runs the leangth of the head below the eye and ascends the occipital surface posteriorly.
(one species, M. americana, collected in Iowa, Illinois, Indiana, Kansas, Michigan)
|    Petiole with an anterior peduncle and conspicuous node (Fig. 87); ventrolateral margin of head without a sharp longitudinal carina.||...13.|
| Please send any questions or comments regarding these pages to Tim Linksvayer (Tim.Linksvayer@alumni.carleton.edu)