. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 44 Bulletin Museum of Comparative Zoology, Vol. 151, No. 1. Figure 37. Labral structure, M. insulcatum (uncoated holotype). Arrow indicates one of the long labral hairs. Scale line. mm. The following is based on the descrip- tion of Gregg and the figure which ac- companies it: frontal furrow a narrow, conspicuous groove; orbital furrows nar- row, moderately conspicuous (in drawing appearing much as in donisthorpei). Man- dibles with 10 teeth and two apical den- ticles, but apparently lacking preapical denticles.

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 44 Bulletin Museum of Comparative Zoology, Vol. 151, No. 1. Figure 37. Labral structure, M. insulcatum (uncoated holotype). Arrow indicates one of the long labral hairs. Scale line. mm. The following is based on the descrip- tion of Gregg and the figure which ac- companies it: frontal furrow a narrow, conspicuous groove; orbital furrows nar- row, moderately conspicuous (in drawing appearing much as in donisthorpei). Man- dibles with 10 teeth and two apical den- ticles, but apparently lacking preapical denticles. Head dorsally with narrow lon- gitudinal "striations or rugulae" from. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum

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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology