1901. J MYBIAPODA 01" TUB " SKBAX EXPEDITION." 513 



obtuse angle with the lateral margin, which makes au acute angle 

 with the anterior. There is only one row of tubercles. 



5t7i tergite. First trace of shoulder; keel almost carries on the 

 slope of the tergum. The keel starts from very high up, so that 

 the whole surface makes a very gentle curve. 



Sth tergite. The anterior angle is acute, in the next somite it is 

 obtuse. The little teeth on the posterior margins of keels are 

 visible on the 9th somite. On the last two somites the posterior 

 margin of the tergite is elevated into a ridge. The anal tergite 

 shows little trace of the longitudinal ridges so conspicuous in some 

 other species, its margin is also little lobed. The anal valves are 

 very flat, and are provided with the usual setiferoua tubercles. 

 The sterna are coriaceous and without furrows. The posterior 

 keels are very slightly bilobed. 



Plaxykhacus : var. of kelaktainicus. (Plate XXXI . figs, 32-34, 

 42. 56.) 



From Bukit Jala, Jala District. 



Length 83 mm. Length of anteunie 10 mm.; space between 

 liases of antenna a little over 1 mm. 









mm. 









nun. 



Breadth of 1st tei 



.>gite 



! 7 



Br- 



eadth 



of Sth 1 



ergite 12 .', 



v 



2nd 



>) 



10^ 





55 



13th 



„ 12 



" 



3rd 



?? 



11 





5> 



14th 



„ H| 



?> 



4th 



•,) 



12 





55 



16th 



„ U 



15 



5th 



)> 



12 





55 



17th 



5, 1" 



55 



6th 



55 



12| 





55 



18th 



9 



55 



7th 



5? 



12.1 





5) 



19th 



8 



Colour dark chocolate-brown, with broad longitudinal pale stripe 

 along centre of back, including prozonites and extending on to 

 first tergite. Keels pale, legs pale, sternites rather darker than 

 legs, edge of anal plate and antennae pale. 



Head rather narrow ; space between antennae very narrow. 

 Upper lip indented in the middle and armed with five bristles. A 

 depression between the antenna. A deep semicircular pit just 

 above the upper lip, with four bristles along the edges. The 

 frontal furrow does not come to the level of the antenna'. The 

 antennae are long, darker in colour near the end, and densely 

 covered with short hairs, less densely at the 1st and 2nd joints. 

 Surface of bead covered with small tubercles. Frontal furrow 

 comes to edge of first tergite. 



1st tergite. Anterior edge straight with ridge followed by furrow, 

 1 he ridge bearing twelve tubercles which do not extend t<> the 

 augle of the tergite. The posterior margin is st raight and bears leu 

 tubercles; the margins both anterior and posterior are rounded- 

 off at the sides to meet in a rounded angle. The width of the 

 tergite is considerably greater than thai <>r the bead. 



2nd tergite. Keels widely open, almost semicircular, ends 

 projecting forward and downward, ends of keels rounded; two 

 I'ow s of tubercles distinct. 



