440 PERCY SLADEN TRUST EXPEDITION 
56. Rhynchenus spissus, n. sp. (Pl. 28, figs. 31, 31 a, 9.) 
Robust, dull; varying in colour from ferruginous to piceous, the rostrum in part or 
entirely, the antennze and legs (one or two dark annuli on the posterior femora excepted) 
ferruginous, the elytra in light-coloured examples more or less angulate-fasciate or spotted 
with black (the dark markings sometimes reduced to a small oblong spot before the middle 
of the suture) ; variegated with a dense clothing of flavo-cinereous and blackish (or dark 
brown) pubescence, the light and dark hairs usually condensed into one or more interrupted 
angulate fasciz on the elytra, the cinereous hairs in dark individuals reduced to a few 
small patches; the prothorax and base of the elytra also set with scattered, long, pro- 
jecting sete. Head densely punctulate; eyes very large, contiguous above; rostrum 
strongly deflexed, moderately stout, curved, in $ reaching beyond the intermediate coxee, 
shorter in 2, shining, punctate-striate, rugose at the base; antennz inserted far behind 
the middle, the funiculus setose, 6-jointed, joints 2 and 3 elongate, slender, 4—6 shorter, 
the club loosely 3-jointed. Prothorax short, the sides rounded to the abruptly separated 
narrow anterior lobe, densely punctulate. Elytra broad, somewhat rounded at the sides 
and blunt at the tip; narrowly punctate-sulcate, the mterstices broad, somewhat convex, 
densely punctulate. Beneath shining, closely, finely punctate. Legs stout; femora 
unarmed, the posterior pair greatly incrassate. 
Length 22—23 mm. (f9). 
Loc. Seychelles: Silhouette, Mahé. 
Silhouette, from Mare aux Cochons, ix. 1908. Mahé, from near Morne Blane, 
ca. 800—1000 feet, and from Cascade Estate and the forests above: also several 
specimens from an islet near Mahé, Anonyme Island, 1. 1909. A long series, varying 
greatly in colour and in the development of the black angulate fascize on the elytra, which 
may be obsolete in light-coloured individuals or completely lost in darker examples. 
R. spissus bears some resemblance to the European fF. loncere ; but it is a broader and 
more robust insect with stouter legs. The specimens with the longer rostrum are assumed 
to be females. 
Group Cryptorrhynchina. 
The nine Cryptorrhynchids contained in the collection under examination belong 
to nearly as many genera, several of which are probably endemic. More species of the 
apterous genus Acalles (so well represented in many Oceanic islands) might have reason- 
ably been expected to occur in the Seychelles. In addition to the forms before me, an 
introduced Camptorrhinus has been recorded from Mahé. 
ACALLES. 
Acalles Schénherr, Cure. Disp. Meth., p. 295 (1826); Gen. Cure., iv. p. 325 (1837). 
A genus of world-wide distribution. The single remarkably distinct species now 
described from the Seychelles is certainly endemic. 
