395 



First tergite smooth , with a faint marginal sulcus. The rest of the 

 segments with the posterior portion a little elevated; the transverse 

 sulcus very weak if not obsolete on all the segments; the transverse 

 striation of the anterior portion rather coarse; the longitudinal striae 

 complete above the legs and extending right on to the summit of the 

 segment behind the pores as a narrow transverse coarsely ridged band , 

 which is dorsally separated from the anterior transversely striolate 

 area by a smooth strip ; on the 5 th segment (? also the 4 th ) the trans- 

 verse band is divided from the posterior smooth part of the segment 

 by a deep groove ; posterior portion of segments longitudinally wrinkled 

 dorsally. Pores conspicuous, defined posteriorly by a semi-circular 

 groove from which a fine longitudinal stria runs backwards to the 

 edge of the segment. Scobina consisting of a crescentic groove, the 

 area in front of which is smooth, while that behind it is finely strio- 

 late, extending from about the 9 th to the 36 th segment. 



Anal tergite not surpassing the valves , but with its posterior margin 

 acutely produced in the middle; valves with borders lightly compres- 

 sed; sternite posteriorly bluntly angular. 



Legs robust ; coxse of the 3 rd , 4 th and 5 th pairs produced inferiorly ; 

 the segments of the 6 th and 7 th stout and flattered beneath ; the tarsus 

 of apparently all of them padded and without setae. 



Copulatory apparatus very like that of Rh. xanthosonus; but with 

 the process of the median piece and the inferior parts of the lateral 

 pieces more elongate. 



Number of segments 46. 



Length 82 mm. , width 8. 



Loc. Celebes, a single <$ example (S. J. Hickson). 



Easily recognisable from all the species obtained by Dr. Max Weber 

 by the remarkable sculpturing of the middle part of the body-segments. 



Trigoniulus Pocock. 



Journ. Linn. Soc. Zool. XXIV, p. 484. 



Like Rhinocricus but with the collum laterally triangular and no 

 scobina. 



92. Trigoniulus goësii (Porat). 



Sumatra: Padang, Singkarah, Manindjau. 



