1918.] 



F. H. Gravely : Passalidae of the World. 



93 



The convexity of the upper margin of the left mandible 

 moderately high ; the mentum with no trace of a median 



groove 



The convexity of the upper margin of the left mandible very 



pronounced ; the mentum with a fine groove in front 

 The anterior angles of the head more or less obtuse, never 



prominent 

 The anterior angles of the head sharper, more or less distinctly 



prominent 

 At most 32 mm. long ; usually shorter 

 At least 34 mm. long, usually much longer 

 At most 40 mm. long ; the right outer tubercle distinct and 



more or less sharply pointed in unworn specimens, the 



antennal lamellae and other characters very variable 

 At least 43 mm. long; ; the right outer tubercle more obtuse or 



absent 

 The right outer tubercle more or less obsolete ; the tenth ribs 



of the elytra hairless and unpunctured throughout 

 The right outer tubercle distinct ; the tenth ribs of the elytra 



punctured and hairy anteriorly 

 The right outer tubercle simple, acute and moderately long 

 The right outer tubercle usually shorter, truncate or rounded ; 



sometimes, however, divided into two separate tubercles of 



which the outer one or both may be more or less long and 



acute 

 The anterior angles of the head scarcely prominent ; the tip of 



the right outer tubercle not bent outwards 

 The anterior angles of the head distinctly prominent ; the tip 



of the right outer tubercle bent more or less abruptly 



outwards 

 At most 38 mm. long ; the anterior angles of the head scarcely 



more prominent than in A. illegalis, somewhat variable 

 Specimens no larger than A. laevicollis with the left anterior 



angle of the head produced into a long slender inwardly curved 



process ; larger ones (which may be as much as 55 mm. in 



length) with the angles more moderately prominent, the 



largest closely resembling A. laevicollis in form 

 The canthus without any upwardly directed tubercle 

 A small and stout erect tubercle arising from the dorsal surface 



of the canthus immediatelv in front of the eve 



A. heljeri, p. 89. 



A. alutaceostemus, p. 90. 



A. pilifer, p. 90. 



• • • • 



A. perakensis, p. 91. 



• • • « 



A. tricomis, p. 91. 

 A. laniger, p. 91. 



A. möschleri, p. 91. 



A. illegalis, p. 91. 



A. laevicollis, p. 91. 



A. grandis, p. 92. 

 A. occulidens, p. 92. 



6. 

 9. 

 7. 



10. 



11. 



12, 



Genus PELOPIDES, Kuwert,. 1896, p. 229. 



Incl. Gnaphalocnemis, Heller, 1900 (— Eriocnemis, Kaup, 1868, preoccupied). 

 jUso TrapezocJcilus, Zang, 1935 (=PJtraortes, Kuwert, 1896. preoccupied) + Parapelopides , 



Zang, 1904a. 

 Type, Pelopides gravidus, 1 Kuwait, 1898, p. 322. 



1 iSee above, p. 76, footaotc 1. 



