530 Dr. Malcolm Cameron’s descriptions of 
longer than broad, 8th as long as broad, 9th strongly transverse, 
10th much larger and broader than 9th, 11th large, oval. Thorax 
as long as broad, broadest in front, viewed from above with three 
teeth on either side, one at the anterior angles, one before the 
middle and one near the posterior angles; deeply impressed with 
four more or less transverse coarsely punctured grooves, the ridges 
between these smooth and shining; the first groove follows the 
anterior margin and is not interrupted on the middle line of the 
disc, the 2nd and 3rd are both interrupted by a narrow longitudinal 
keel, the 4th follows the posterior margin and is not interrupted. 
The 3rd ridge has a large puncture on either side. Hlytra transverse, 
shorter than the thorax, shoulders prominent, dilated and rounded 
at the sides; disc irregular, the surface of each with three elevations 
or calli, one longitudinal near the suture, one passing back from 
the humeral angle, the third, rounded and situated at the middle 
of the lateral border; the depressions between the calli present 
some large irregular punctures, the rest of the surface smooth and 
shining, black with an irregular yellow band passing from near the 
base of the suture outwards and slightly backwards to the middle 
of the lateral border, but not quite reaching it, and an elongated 
yellow patch reaching from the inner end of the first to the posterior 
margin along the suture, nowhere, however, does the yellow colora- 
tion involve the margins, which are entirely black. Abdomen 
smooth and shining, the first five visible segments with an oblique 
stria on either side of the base. 
3: Unknown. 
Hab. Cryton, Galle; Assam, Patkai Mountains (British 
Museum Collection). 
STENINI. 
9. Stenus diffidens, n. sp. 
Black, shining, abdomen bordered, with a median keel at the 
base of the first four visible segments. Elytra ample, as broad as 
long. Antennae, legs and palpi testaceous, the club of the former 
scarcely infuscate. Fourth joint of the tarsi simple. Length 
2°38 mm. 
In the build of the fore-parts somewhat similar to S. bispinus, 
Mots, but much less shining and quite distinct by smaller size and 
the structure of the tarsi and abdomen. 
Head broad, about one-third broader than the thorax, narrower 
than the elytra, depressed on either side of the front which is 
elevated and more finely punctured than at the sides where 
