266 PERCY SLADEN TRUST EXPEDITION 
bears a dorsal basal brown patch often connected with the central area, and frequently 
also a lateral spot (cf fig. 9). All these markings are much more in evidence when 
examined with a low power than under a strong lens. 
The prothorax is as long as it is broad, being widest at the angle of the carina, 
which projects a little laterally, and is rounded-angustate forward. It bears the very 
dense network of shallow punctures also found in Choragus Kirby (1818). The elytra 
are one-sixth broader than and twice as long as the pronotum, and rough with irregular 
puncturation ; some larger punctures along the suture form a row which is slightly 
impressed, there being no other stripes. The base of the elytra is somewhat depressed. 
The pygidium is different in the sexes. It is almost square in the @, large, one-third 
broader than long, vertical, with the angles rounded off; in the ¢ it is proximally 
twice as broad as it is long, triangular, with the sides less rounded than the apical 
margin. 
The prosternum is punctured, whereas the rest of the under side is minutely 
coriaceous. The eighth tergite of the g (beneath the pygidium) is divided into two 
narrow convergent lobes of nearly even width and with rounded tips. 
Loc. Mahé: country above Port Glaud, 500—1000 ft., XI. 1908 ; top of Mt. Sebert, 
2000 ft., I. 1909; Mare aux Cochons, I.—II. 1909. Silhouette: near Mont Pot-d-eau, 
1000 ft., VIII. 1908; Mare aux Cochons, IX. 1908. 
Dysnos, Pasc. (1859). 
Dysnos, Pase., Ann. Mag. Nat. Hist., ser. 3, iv. (1859) p. 488. 
The eyes are large and converge posteriorly, the frons being narrower behind 
than anteriorly. The antennze are slender, bear long bristles and have a very loose 
club. The basal angles of the pronotum are produced backwards, the short longitudinal 
basal lateral carina forming an obtuse angle with the dorsal carina. 
The genus is apparently cosmopolitan in the tropics, being known from the 
Oriental and Nearctic Regions as well as the Seychelles. 
21. Dysnos ethiops, spec. nov. (Plate 15, fig. 10). 
$¢. Supra niger, opacus, subtus rufescens, ore, antennarum basi, coxis, tarsorum 
apicibus plus minusve rufis, pube griseo-aurea sparsissime vestitus ; pronoto creberrime 
ruguloso-punctato, elytris antice valde convexis, confertissime granulosis punctato-striatis, 
callo subbasali sat distincto. 
Long. (cap. excl.) 3°6 mm. 
Four specimens. 
The frons is posteriorly half as wide as the rostrum. The prothorax is half as 
broad again as wide, slightly narrowing from the base to the centre and thence much 
more strongly to the apex, which is barely more than half the width of the base. 
The elytra are half as long again as, but not broader than, the prothorax, the sub- 
basal dorsal and humeral callosities being distinct. The pygidium is triangular, with 
the apex rounded and the sides nearly straight in g, and one-third broader than it 
