CLASSIFICATION OF THE DERMESTIDAE 11 



Genus Perimegatoma Horn 



Hastisetal tufts short, compact, progressively larger and denser posteriorly in 

 larvae of the late stages, somewhat more distinctly prominent on segments 5 

 to 8 in larvae of the early stages. Antenna (fig. 2, O) long, second segment more 

 than twice as long as first. Middle setal series of labro-epipharyngeal margin 

 (fig. 4, E) with broad setae only, typically 4, sometimes 5. Epipharynx (fig. 4, 

 E) with distal sensory papillae loosely grouped in a faintly defined, transverse, 

 fusiform area near middle of epipharynx, papillae medium to minute in size, dis- 

 tinctly and widely separated ; a median pair of sensory cups ; a proximal trans- 

 verse series of about 9 sensory cups ; epipharyngeal rods fairly broad, nearly 

 straight, diverging lateroposteriorly. Mandible rounded, inner cutting edge 

 rounded ; retinaculum present. 



Genus Trogoderma Latreille 



Hastisetal tufts short, compact, progressively larger and denser posteriorly 

 in larvae of the late stages, typically prominent on segments 5 to 8 in larvae 

 of the early stages. Antenna (fig. 2, P) short, second segment subequal to first, 

 rarely twice as long. Middle setal series of labro-epipharyngeal margin (fig. 

 4, F) with broad and slender setae, typically 2 broad inner and 2 slender outer 

 setae, or with broad setae only. Epipharynx (fig. 4, F) with distal sensory 

 papillae in a single, sharply defined, compact group near distal margin of epi- 

 pharynx ; a median pair of sensory cups ; a proximal transverse series of 10 to 

 20 sensory cups; epipharyngeal rods slender, tapering posteriorly, diverging 

 lateroposteriorly. Mandible (fig. 2, G) distally rounded, inner cutting edges 

 rounded ; retinaculum present. 



Genus Unnamed 

 ([Perimegatoma] vespulae Milliron) 



Agrees with all characters given for Trogoderma, except that the sensory cups 

 of the proximal transverse series number about 8, never 10 or more. 



Genus Thaumaglossa Redtenbacher 

 (T. americana Jayne) 



Tergites at midline with very long spinulate setae, in addition to shorter 

 normal spinulate setae and hastisetae ; hastisetal tufts progressively larger 

 and denser posteriorly. Antenna short. Middle setal series of labro-epipharyn- 

 geal margin (fig. 5, A) with slender setae only, typically 4. Epipharynx (fig. 5, 

 A) with distal sensory papillae in a single, sharply defined, compact group near 

 distal margin of epipharynx ; a median pair of sensory cups ; a proximal trans- 

 verse series of about 6 sensory cups; epipharyngeal rods slender, curved, and 

 diverging lateroposteriorly. Mandible distally rounded, inner cutting edges 

 rounded; without retinaculum. 



Genus Cryptorhopalum Guerin 

 (C. duoium Sharp) 



Hastisetal tufts on seventh segment only, prominent, long, dense, directed 

 posteriorly. Antenna short. Middle setal series of labro-epipharyngeal margin 

 (fig. 5, B) with slender setae only, and these sometimes lacking. Epipharynx 

 (fig. 5, B) with distal sensory papillae in a single, sharply defined, compact 

 group near distal margin of epipharynx ; a median pair of sensory cups ; a 

 proximal transverse series of about 14 sensory cups ; epipharyngeal rods broad, 

 anterior two-thirds straight and parallel, posterior third abruptly tapering and 

 diverging lateroposteriorly. Mandible distally rounded, with a sharp tooth on 

 each inner cutting edge ; retinaculum present. 



Genus Globicornis Latreille 

 (G. prob. fulvipes Guer.) 



Hastisetal tufts on segments 7 and 8, prominent, long, dense, directed pos- 

 teriorly. Frons with a single medioanterior tubercle. Antenna short. Middle 

 setal series of labro-epipharyngeal margin (fig. 5, C) with slender setae only, 



