38 M. W. NIELSON 



— Aedeagus in lateral aspect with width of ventral appendage much wider than 



apex of dorsal appendage (Text-fig. 271) ...... 40 



38 (37) Aedeagus in lateral aspect with spines on ventral margin of dorsal appendage 



(Text-figs. 262, 266) .......... 39 



— Aedeagus in lateral aspect with spines on ventral margin of dorsal appendage 



and dorsal margin of ventral appendage (Text-fig. 256) 



aurulenta (Walker) (p. 96) 



39 (38) Dorsal appendage of aedeagus in lateral aspect very broad, median width 



over five times median width of ventral appendage (Text-fig. 262) 



coacta sp. n. (p. 98) 



— Dorsal appendage of aedeagus in lateral aspect narrow, median width less than 



four times median width of ventral appendage (Text-fig. 266) 



pectoides sp. n. (p. 100) 

 4° (37) Ventral appendage of aedeagus in lateral aspect slightly trumpet-shaped or 

 tube-like apically, extending up to or slightly beyond apex of dorsal 

 appendage (Text-figs 277, 281) ........ 41 



— Ventral appendage of aedeagus in lateral aspect quadrate apically, extending 



much beyond apex of dorsal appendage (Text-fig. 271) perlucida sp. n. (p. 101) 



41 (40) Pygofer process very long, extending to or beyond dorsal margin of pygofer 



(Text-figs 279, 284) ; aedeagus without flange on dorsal appendage (Text-figs 



281, 288) 42 



— Pygofer process short, not reaching dorsal margin of pygofer (Text-fig. 274) ; 



aedeagus with flange on dorsal appendage (Text-figs 276, 277) 



lineata sp. n. (p. 103) 



42 (41) Pygofer process serrate on inner lateral margin; dorsal appendage of aedeagus 



with broad ventral spines occupying about half of the ventral margin 

 (Text-fig. 281) ....... marlatti sp. n. (p. 105) 



— Pygofer process without serrations on inner lateral margin; dorsal appendage 



of aedeagus with sharp ventral spines basally (Text-fig. 288) 



borneoensis sp. n. (p. 107) 



43 (35) Dorsal appendage of aedeagus with one pair of basal spines or ventral spine 



on base of stem (Text-figs 296, 302) ....... 44 



— Dorsal appendage of aedeagus with two pairs of long subapical spines (Text-fig. 



291) ......... quadrifida sp. n. (p. 108) 



44 (43) Aedeagus with spines on dorsal appendage. ...... 45 



— Aedeagus with ventral spine on base of stem (Text-fig. 296) 



leucomelana (Walker) (p. no) 



45 (44) Dorsal appendage of aedeagus with lateral or dorsal spines (Text-figs 306, 311) . 46 



— Dorsal appendage of aedeagus with ventral spines (Text-fig. 302) 



pustula sp. n. (p. 112) 



46 (45) Dorsal appendage of aedeagus with dorsal spines, flange dorsal subbasally 



(Text-figs 306, 307) ...... gladia sp. n. (p. 113) 



— Dorsal appendage of aedeagus with lateral spines, flange ventral subapically 



(Text-figs 311, 312) ...... villicaris sp. n. (p. 115) 



47 (16) Pygofer process aperturized apically (Text-figs 314, 319, 324) ... 48 



— Pygofer process without aperture or opening apically (Text-figs 374, 377) . . 59 



48 (47) Plate with distal segment subquadrate or semi-globular (Text-figs 315, 320, 



325) 49 



— Plate with distal segment typically elongate (Text-figs 354, 359) ... 56 



49 (48) Pygofer process with aperture on inner apical margin; plate subquadrate 



(Text-figs 320, 325) 50 



— Pygofer process with aperture on outer apical margin; plate semiglobular 



(Text-fig. 315) . . . . . . . straminea (Osborn) (p. 117) 



