118 OrpeER—HYMENOPTERA. 
TREMEX INSULARIS. 
(Smith, Proce. Linn. Soe. vol. ii. No. 7, 1858, p. 117.) 
Ater : capite et thorace disco viridibus ; collari flavo, thorace flavo variegato ; alis subhyalinis margine antico 
fuscis; antennis nigris, articulis apicalibus flavis; abdominis segmentis flavo fasciatis, ultimo utrinque striga 
obliqua flava; tibiis flavis tarsis ferrugineis. (Fcem.) 
Long. corp. lin. 8; expans. alar. antic. lin. 144. 
Habitat; Sarawak (Borneo), and Malacca. 
Head brassy-green, strongly punctured ; the antenne black, with the apical joints yellow ; the face thinly 
covered with white pubescence. Thorax, the disc, and the scutellum with a green tinge; the pro- and meta- 
thorax above, yellow; the segments of the abdomen have each a yellow fascia, the first two slightly inter- 
rupted; the terminal segment with an oblique yellow stripe on each side. The tibiz yellow, the tarsi ferru- 
ginous; base of the abdomen yellow beneath; wings subhyaline ; a dark fuscous stain along the anterior margin 
of the superior pair; the apical margins of both wings fuscous. 
Genus—ORYSSUS. 
ORYSSUS IMPERIALIS. 
Pratt XXII, Fra. 1. 
Lete viridis: capite parum obscuriore ; antennis setigeris pedibusque eneis; alis fuscis. (Mas.) 
Long. corp. lin. 10; expans. alar. lin. 14. 
Habitat; Gold Coast, Africa. In Mus. D. Swanzy. 
The head (fig. 1a, seen from the front) is very rugose; the face with two slight curved carine extending 
from the anterior margin of the clypeus to the lower part of the eyes; the face has the lateral margins slightly 
raised, with three conical tubercles on each side, a small tuberculated ridge also extends across the forehead 
between the tops of the eyes. The antenne are irregularly curved, the ninth joint is not thicker, but rather 
longer than the preceding, oblique at its tip, and the tenth joint is very small. The thorax is punctured, the 
dorsum of the mesonotum tricarinated. The basal seement of the abdomen has two transverse, slightly curved 
series of very short deeply impressed lines at its base, followed by a narrow, transverse, polished space, with 
a small dull black dot on each side; and the broad terminal margin of the segment is very rugosely punctured. 
The six terminal segments of the abdomen are much more delicately punctured. The legs are neous, the 
anterior tibize have a strong notch on the under side near the tip (fig. 14), and the tarsi are set on obliquely ; 
the posterior tibie are subserrated on their outer margin. The wings are dark brown, with a slight purplish 
gloss. 
ORYSSUS PLUMICORNIS. 
(Guérin-Méneville in Lefevre, Voyage en Abyssinie, Ins. pl. VIII, fig. 1.) 
PiatE XXII, Fie. 2. 
Elongatus, viridi-ceruleus: capite valde rugoso, utrinque ad oculos tridentato (fig. 2.) ; antennis nigris 
pilosis, articulis inequalibus, primo et tertio et quarto quinto septimoque fere wequalibus ; thorace dense et fortiter 
punctato, antice supra tricarinato, abdomine basi vix angustato, postice rotundato, tenuiter punctato, rugoso, 
griseo subpubescenti; alis fumatis, costa basali brunneo-nigra, fascia media transversa hyalina, posticis fere 
hyalinis. 
Long. corp. lin. 9; expans. alar. lin. 13. 
Habitat ; Natalia (Guérin-Méneville), et Abyssinia (Lefevre). 
