166 THE ENTOMOLOGIST. 
. Mattiphus splendidus, sp. n. 
Head, pronotum and scutellum resplendent green, corium pale 
castaneous with greenish reflexions, membrane very pale castaneous ; 
body beneath resplendent-green or golden-green; head beneath, 
rostrum and legs pale castaneous; antennze castaneous, becoming 
darker towards apex, second joint longest, third a little shorter than 
fourth; pronotum and scutellum more or less finely transversely 
wrinkled ; corium thickly but very finely punctate. 
Long, 23-25 mm.; breadth between pronotal angles, 11-12 mm. 
Haut-Mékong. 
Allied to M. jaspideus, H. Sch., but with the lateral margins of 
the pronotum more uniformly rounded. 
XIENGIA, gen. nov. 
Body elongate, about twice as long as breadth between pronotal 
angles, distinctly narrowing towards apex; head about as long an 
breadth between eyes, obliquely depressed, somewhat convex on 
basal area between eyes ; ocelli placed close to eyes ; rostrum reaching 
or very slightly passing the anterior coxe; antenn with the basal joint 
moderately thickened, second joint considerably longer than first; 
pronotum laterally and angularly dilated, the lateral angles broad, 
but apically finely and spinosely tranversely produced, anterior pro- 
notal area acutely depressed; scutellum much longer than broad at 
base, a little before apex somewhat suddenly narrowed, the base 
slightly convex; mesosternum centrally ridged or keeled; tibize 
moderately compressed or suleate on apical halves. 
I have placed this genus near Origanus, Dist. 
Xiengia elongata, sp. n. 
Ochraceous; eyes and a prominent apical spot to scutellum, 
black; head and anterior area of pronotum paler in hue than the 
basal pronotal area; membrane paler and brighter in hue; body 
beneath and legs ochraceous; antennz ochraceous, apex of second 
joint black (remaining joints mutilated); anterior area of head and 
anterior and lateral pronotal margins more or less speckled with 
black, the anterior lateral margins serrate, the posterior area darker 
in hue and somewhat thickly and strongly rugulose, the lateral angles 
transversely, spinously produced; scutellum rugulose and punctate ; 
body beneath and legs ochraceous; rostrum robust, just passing the 
anterior cox, finely, centrally, longitudinally channelled beneath. 
Long, 33 mm.; breadth between anterior pronotal angles, 173 mm. 
Xieng Khouang. 
Subfam. DrInipoRIN&. 
© Cyclopelta abdominalis, Dist. Aspongopus brunneus, Thunb. 
rg wt rugosa, sp. 0. M4 laosanus, sp. 0. 
5 obscura, Lepell. and , Megymenum brevicorne, Fabr. 
Serv. As mekongum, sp. n. 
~ Aspongopus fuscus, Westw. sa parallelum, Voll. 
bs nigriventris, Westw. os spinosum, Burm. 
; . chinensis, Dall. 
