. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. KEY TO THE GENERA AND SPECIES OF PHILEURINI IN THE UNITED STATES Head with a transverse ridge at base of clypeus, median portion of head not depressed and sides without tubercles. Archophileurus cribrosus Head without transverse ridge, median portion depressed, sides in front of ej'e with small or large tubercles Phileurus-2 Front tibiae with impression between first and second dentations truncate at base; elytral interspaces two, four and six enlarged and raised to form costae castaneous Impr
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. KEY TO THE GENERA AND SPECIES OF PHILEURINI IN THE UNITED STATES Head with a transverse ridge at base of clypeus, median portion of head not depressed and sides without tubercles. Archophileurus cribrosus Head without transverse ridge, median portion depressed, sides in front of ej'e with small or large tubercles Phileurus-2 Front tibiae with impression between first and second dentations truncate at base; elytral interspaces two, four and six enlarged and raised to form costae castaneous Impression between first and second dentations with apex sharp, not truncate 3 Canthus prominent, formed by a continuation of lateral margin of head, frontal tubercles not situated on lateral margins of head Hiatus Canthus small, formed by a continuation of a vertical ridge from the frontal tubercle which is situated on margin, lateral margin of head not continuous to canthus, base of frontal tubercle with vertical groove formed by insertion of antenna trimcatus. Fig. 1. Male Fig. 2. Male Fig. 3. Male Fig. 4. Male Fig. 5. Male Fig. 6. Male Fig. 7. Male Fig. 8. Male EXPLANATION OF PLATE 37 genitalia of Phileurus truncatus (Beauv.) (dorsal). genitalm of Phileurus tr-uncatus (Beauv.) (side), genitalia of Pliileurus castaueus Hald. (dorsal), genitalia of Phileurus castaneus Hald. (side), genitalia oi Phileurus Hiatus Lee. (dorsal), genitalia of Phileurus Hiatus Lee. (side), genitalia of Archophileurus cribrosus (Lee.) (dorsal), genitalia of Archophileurus cribrosus (Lee.) (side). 171. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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