OMMATOLAMPUS NIGROLIMBATUS. 171 



narrowly bordered with black , the disk with 5 delicate , 

 remote punctate-striate lines, the 5th abbreviated before 

 the middle, the exterior striae only striate-punctate , the 

 punctures ordinarily surrounded by a transverse fuscous 

 shade. First interstice not enlarged at the apex. (My spe- 

 cimen of 0, tetraspilotus shows the second stria outwardly 

 convex towards the apex). P y g i d i u m ferruginous , its 

 base (often covered by the elytra) and sometimes a narrow, 

 posteriorly abbreviated line aloug the middle , of a dark 

 colour; the apex impressed, the impression rugose, and 

 covered with reddish yellow bristles, which are moderately 

 densely set; in the male the base of the pygidium is more 

 deeply punctured. 



underside and tarsi black , lateral margins of prester- 

 num, episterna of metathorax along their inferior margin, 

 the abdominal segments on the sides with a subtriangular 

 spot (sometimes connecting with the opposite one by a 

 ferruginous line running along the posterior margin of the 

 segment) and the analsegment (sometimes the black base 

 and apex excepted), reddish ferruginous. Episterna of meta- 

 thorax more strongly punctured than in 0. tetraspilotus. 

 Femora and tibiae reddish ferruginous , the first at base 

 and apex dusky. 



The male differs from the female by the smaller size , by 

 the structure of the antennae as is mentioned above, and 

 by the stouter pygidium , which is more strongly punctured 

 at the base. 



In all other respects like tetraspilotus. 



The determination of the known species of the genus 

 Ommatolampus will be facilitated by the following table: 

 1. Prothorax without an elevated middle line, elytra deli- 

 cately striated. 



2. Pygidium with a bilobed , somewhat ashy spot at 

 the apex , elytra uniformly coloured , long. tot. 

 37 mm. stigma Pasc, Andaman. 

 2'. Pygidium without such a spot. 



Notes froiu th.e Leyden ^Museum, "Vol. XVI. 



