U. S. NATIONAL MUSEUM PROCEEDINGS VOL. 92 PLATE 18 
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/0.RHIZOTROGUS /1 PHIZOTROGUS 
1-3, 5, Melolontha melolontha (Linnaeus): 1, Epipharynx; 2, part of right mandible (ventral); 
3, raster; 3A, two pali; 3B, tegillar seta; 5, maxillary stipes with lacinia and galea 
(dorsal). 
4,6,7, Anoxia pilosa (Fabricius): 4, Epipharynx; 6, raster; 7, anterior margin of frons; 
7A, subapical (3) and apical (4) articles of antenna (dorsal); 7B, subapical (3) and 
apical (4) articles of antenna (ventral). 
8,9, Polyphylla occidentalis (Linnaeus): 8, Epipharynx; 9, raster. 
10-12, Rhizotrogus solstitialis (Linnaeus): 10, Epipharynx; 11, part of labrum, clypeus, and 
frons; 12, raster, one enlarged palus, and one enlarged tegillar seta. 
