371 



Resembling Cyrtodesmus in the large size of the 2 nd segment, de- 

 pression and size of the keels of the rest of the segments, position 

 of the pore, proximity of legs etc. but easely separable by the pre- 

 sence of the dorsal tooth. 



68. Doratonotus armatus , sp. n. PL XXII, fig. 11 — lie. 

 Java: Buitenzorg and Tjibodas. 



Colour (in alcohol); upper surface deep dull black, keels ochraceous 

 the three posterior processes of the dorsal series also ochraceous, the 

 rest being black; head black, labrum and apex of antennae and legs 

 testaceous. 



Head rugose above, without vertical sulcus; labral region defined 

 above by a deep arched groove, its sides parallel, its inferior margin 

 convex at the sides, concave and dentate in the middle, the surface 

 of the region with a transverse arched series of fossulae and a series 

 of punctures along its upper border. Antennce short and tolerably 

 thick, the 1 st and 7 th segments the smallest, the 6 th the largest, the 

 2 nd , 3 nd , 4 th and 5 th subequal in length. 



The first tergite small, about as wide as the head, hollowed in 

 the middle, its anterior border convex from side to side , its side pro- 

 duced into a rounded angle, its posterior margin straight in the 

 middle. Second tergite finely granular, flat or nearly so in the middle 

 line above, furnished with large rounded close set tubercles on each 

 side, its anterior margin concave above, the plane of the keel nearly 

 vertical, its anterior and inferior margins strongly convex, the pos- 

 terior margin nearly straight but both anterior and posterior margins 

 distinctly lobate. 3 rd and 4 th segments with sides of the upper surface 

 elevated and lowly tubercular, the keels with upper surface convex 

 from base to point, the anterior and posterior borders converging, 

 the anterior border nearly straight, the posterior distinctly uni-lobate 

 near its base, the upper surface of the 4 th with posterior tubercle 

 on each side large. The rest of the segments bearing a dorsal median , 

 backwardly directed , superiorly sulcate and apically bifid process, which 

 increases in length and strength from the 5 th to the 15 th , on the 

 14 th it is small; the keels narrowed distally, distinctly bilobate at the 

 base posteriorly , in the middle of the body the extremity is rounded at 

 the posterior end, the anterior angle is convex and the posterior 

 slightly produced. Anal tergite without a median process, coarsely 



