428 Mr. R. E. Turner on 
Xylonomus vitiosus, sp. 0. 
@. Nigra, opaca; palpis, facie, orbitis late, propleuris fascia hori- 
zontali,mesonoto antice macula magna utrinque fasciaque obliqua 
utrinque postice, tegulis, mésopleuris macula lineaque ante alas, 
scutello macula mediana quadrata, maculaque. parva basali 
utringue, segmento mediano apice late, abdomine fere toto 
subtus, tergitis primo, secundo, tertioque macula magna laterali 
triangulari utrinque, fascia anguste apicali connectis, tergitis 4—7 
fascia angusta apicali, pedibusque ochraceis; antennis ante 
apicem late albido cinctis ; alis hyalinis, venis nigris. 
Long. 16 mm.; terebre long. 10 mm. 
2. Clypeus extremely short ; face finely and very closely 
punctured; front more finely and sparsely punctured ; 
vertex shining, with a few small scattered punctures. 
Antenne about 26-jointed, the ten basal joints black, the 
next nine whitish, the remainder black. Pronotum pro- 
duced on each side into an acute tubercle; mesonotum 
closely punctured, with a tendency to irregular reticulation, 
notauli deep and crenulate, the lateral lobes separated at 
the apex by a strongly margined longitudinal groove. 
Seutellum with a deep transverse excavation at the base, 
the excavation is smooth and shining and divided by a 
longitudinal carina, the median portion of the scutellum 
finely and closely punctured, the sides apically depressed 
and obliquely striated. Pleurze closely punctured. Median 
segment with an elongate triangular basal area which is 
immediately followed by a larger cordate area reaching to 
the base of the apical truncation ; the spaces on each side 
of the central areas divided by a transverse carina and 
margined by a carina laterally and apically, the apical angles 
produced into a strong spine; the dorsal surface of the 
segment finely and closely punctured. First tergite half as 
long again as the second, irregularly rugose-reticulate, the 
apical portion indistinctly transversely strigose and with a 
low longitudinal carina. Second and third tergites very 
closely punctured, the second feebly reticulate at the base, 
both with oblique striated depressions from close to the 
base to beyond the middle, also with another oblique de- 
pression laterally cutting off a triangular area at the basal 
angles, a rounded striated groove joining the lateral grooves _ 
apically to the median impressions. Apical tergites micro- 
scopically punctured. Hind tibie black at the extreme 
base. - 
Hab, Sala San Yiot, Luang Prabang; March 10, 1918. 
LO . 
=f 
