156 PERCY SLADEN TRUST EXPEDITION 
longest, third and fourth subequal in length, first shortest ; head—excluding basal 
margin—thickly finely punctate, apex reaching middle of first antennal joint ; pronotum 
with the lateral margins moderately ampliate, anteriorly punctate behind head, posterior 
lobe very coarsely punctate; scutellum centrally depressed, thickly rather coarsely 
punctate; corium thickly finely punctate, clavus longitudinally punctate ; membrane 
about reaching abdominal apex; rostrum reaching the intermediate coxe. 
Var. Two small rounded spots on corium almost in line with those on clavus, and a 
small spot on apical margin of corium, ochraceous. In some specimens the ochraceous spots 
are almost entirely missing. 
Long. 6 to 7 mm. 
Loc. Seychelles. Mahé: high forest of Morne Blanc. Aldabra: Takamaka (Fryer). 
Cosmoledo, 1907 (Thomasset). Assumption, 1910 (Dupont). 
Allied to L. punctus Bergr., but a more elongate species, posterior lobe of pronotum 
less coarsely punctate ; scutellum more finely punctate; rostrum not passing the inter- 
mediate coxee ; corium darker, less irrorated with ochraceous, and pale margin much 
narrower. 
ORBELLIS, gen. nov. 
Head somewhat elongate, immersed to eyes which scarcely pass the anterior angles 
of the pronotum, acuminate in front where the central lobe is elevated, ocelli near eyes 
and a little removed from base; antennze only a little shorter than the body, first joint 
about as long as head but considerably passing its apex, third joint a little shorter than 
second, subequal to fourth, first moderately and gradually thickened from near base to 
apex ; pronotum somewhat flat, oblique, posterior margin about twice as broad as anterior, 
the latter slightly concave, the former truncate, lateral margins almost straightly oblique 
and slightly ampliate, obscurely transversely impressed before middle, where it has the 
appearance of a slightly convex lobe; scutellum about as long as broad, a little foveately 
depressed at base; corium with the lateral margins subparallel and slightly but distinctly 
reflexed, apical margins straight ; membrane scarcely passing the abdominal apex, venation 
forming a small transverse cell near base; legs somewhat long, femora moderately 
thickened, anterior femora with a few short spines near apex, tibiee finely spinulose, first 
joint of tarsi longer than remaining joints together ; rostrum imperfectly seen in unique 
carded type. 
Allied to Letheus, but differing in the longer antennze and pronotum &e. 
54. Orbellis typicus, sp. n. (Plate 11, fig. 5). 
Head brassy-black, its apex testaceous; pronotum pale castaneous, the lateral 
margins, anterior margin (centrally broken and not reaching anterior angles), and basal 
margin (inwardly angulate), ochraceous, posterior area more or less suffused with black ; 
scutellum pale castaneous ; corium pale bronzy-brown, the lateral margins narrowly pale 
ochraceous, with some irregular darker spots, the most prominent of which is an elongate 
discal black spot behind middle; membrane pale bronzy-brown ; body beneath and femora 
