f 
, 
. 
e 
>. 
¢ 
Bs 
$s 
described by Mr. F. Walker now in British Museum. 275 
Museum. Rather more slender than the corresponding 
sex of the last two species, the elytra scarcely wider than 
the thorax. The latter is about 1} times as wide as long, 
the sides feebly sinuate in the middle, the disc subnitid, 
distinctly punctured throughout, but not so closely as in 
O. walkeri, and less uneven, with short sparse hairs not 
readily seen unless viewed obliquely. The seriate punc- 
tures of the elytra are very irregular, so that the series are 
difficult to follow, the granules simple and more or less 
regular in size and much less sharply prominent. They 
are arranged in indistinct longitudinal series with a ten- 
dency to collect together into groups, and are not markedly 
different in colour from the general dark background. 
The anterior and intermediate tibiae have a prominent 
tooth on the inner side before the apex. 
A similar sexual character is found in O. laevicollis Pasc., 
but this species is much wider, and has the elytral intervals 
much more regular, the granules small but combined into 
little compact groups well separated from one another. 
The following key may be useful for the identification 
of these and two hitherto undescribed species, all from 
Ceylon.* 
1. (6) Elytral granules simple, not markedly grouped. 
(5) Elytral granules nodular, of very diverse sizes. 
. (4) Thorax i} times as wide as long, median area nearly smooth 
and naked, without basal prominences . .picipes Walk. 
4. (3) Thorax twice as wide as long, punctured and pubescent, 
with a pair of basal prominences enclosing a depression. 
go fo 
walkeri sp. n. 
(2) Elytral granules not very uneven in size, not nodular. 
solida Walk. 
6. (1) Elytral granules collected into compact groups, at least 
on the alternate (2nd, 4th, etc.) intervals. 
7. (10) Pubescence short and sparse, not concealing the derm; 
thorax and elytra separately convex; sexual characters 
as in O. solida. 
8. (9) Thorax nitid, scarcely punctate or pubescent in middle, 
sides not sinuate before anterior angles laevicollis Pase. 
(8) Thorax distinctly punctate and shortly pubescent through- 
out, sides strongly sinuate before anterior angles. Length 
7-8 mm. . , , ‘ , : . lewisi sp. n. 
or 
ve) 
* O. granosa All., from 8. India is unknown to me. 
