>oo MORPHOLOGY AND TAXONOMY OF ADULT MALES 



- Dorsal arm of midcranial ridge fading out well before meeting the postoccipital 



ridge. Two or more dorsal head pores present. Antennal scape with more 

 than 4 hair-like setae. Postmesostigmatal pores absent. Ostioles well 

 developed ............ 5 



4 (3) Lateral arms of midcranial ridge represented only by weak sclerotization. 



Preocular ridge with a well-marked ventral rudiment below the articular 

 process. Genal setae more than 3. Prosternum long and narrow. Post- 

 mesostigmatal setae present in the median and the sublateral areas. 

 Hamulohaltera 1-9 times or more as long as its apical seta. Femur of 

 fore-leg shortest. All pleural setae of abdominal segment VIII subequal 



in length TRIONYMUS (p. 126) 



[Only one species, T. newsteadi.] 



- Lateral arms of midcranial ridge well developed. Ventral rudiment of the 



preocular ridge absent. Genal setae 3 or less. Prosternum triangular. 

 Postmesostigmatal setae only present sublaterally. Hamulohaltera 16 or 

 less times as long as its apical seta. Femur of middle leg shortest. Pleural 

 setae of abdominal segment VIII include one slightly longer seta 



NIPAECOCCUS (p. no) 



5 (3) Ventral rudiment of the preocular ridge entirely absent. Third antennal 



segment 3-3 times or less as long as wide. The three large bristles of the 

 terminal antennal segment of subequal lengths. In fore leg, the tibia 



shorter than the femur PLANOCOCCOIDES (p. 106) 



[Only one species, P. ireneus.] 



— Ventral rudiment of the preocular ridge distinct. Third antennal segment 



usually more than 3-3 times as long as wide. The dorsal bristle of the 

 terminal antennal segment slightly shorter than the two lateral ones. In 

 fore leg, the tibia longer than the femur . . . PLANOCOCCUS (p. 93) 



PSEUDOCOCCUS 



Key to Species 



Penial sheath distinctly triangular in dorsal view, with the style gradually 



tapering apically ........... 2 



Penial sheath subtriangular in dorsal view, the style being rather broad or 



truncate posteriorly .......... 3 



(1) Antennae short, the body being more than twice as long. Only one ante- 

 spiracular ventral seta present. One postmesostigmatal pore always 

 present medially. Posterior metasternal seta less than 3. Ventral setae of 

 abdominal segment VIII absent. Abdominal pores only present laterally. 

 Genital segment long, the body being less than 7 times as long. Aedeagus 

 long, anteriorly reaching the cavity of abdominal segment VII, and evenly 

 tapering posteriorly ........ P. citriculus 



Antennae moderately long, the body being less than twice as long. More than 

 one antespiracular ventral seta present. Posterior metasternal setae more 

 than 5. Ventral setae of abdominal segment VIII at least 4. Abdominal 

 pores present laterally and dorsally. The genital segment rather short, the 

 body being more than 8 times as long. Aedeagus not reaching the cavity 

 of abdominal segment VII, with the distal part broadened in lateral view 



P. fragilis 



