296 Mr. Gilbert J. Arrow’s List of 
27. Micrencaustes convexa, sp. n. 
Nigra, nitida, singulo elytro maculis duabus fulvis ornato, Junula 
humerali ad basin producta et postice bis dentata fasciaque ante- 
apicali antice tridentata fere ad marginem externam attingenti; 
elongato-ovalis, convexa, capite bene punctato, clypeo rugose; 
pronoto minute sed distincte punctato, lateribus bene marginatis, 
leviter arcuatis, angulis anticis acutis, posticis fere rectis; scutello 
transverso; elytris sat discrete seriato-punctatis; tibiarum inter- 
mediarum apice haud spinoso, 
Long, 14 mm.; lat. max. 6 mm. 
Uprer Mexona R.: Ban Pan, Nam Tiene (April, May). 
Very closely related to WM. siamensis. As in that species 
the middle tibiae are not spimose at the end. It is a little 
shorter, more convex and more shining than M, siamensis, 
with slightly more distinct punctures, those upon the elytra 
especially being larger and farther apart. The orange 
markings are almost ‘identical, but the humeral mark does 
not extend quite so far from the basal margin. 
28. Mierencaustes planicollis, sp. n. 
Nigra, haud nitida, elytris flavo-bifasciatis, fascia antica basali cal- 
lum humeralem punctosque duos minutos nigros amplectente, postice 
oblique quadri-emarginata, fasciaque anteapicali transversa, angusta, 
antice et postice bi-emarginata; elongata, angusta, oculis magnis, 
clypeo parvo, fortiter et crebre punctato, fronte subtilius punctata ; 
pronoto sat plano, ubique minute punctato, lateribus fere rectis, 
antice paulo contractis, angulis anticis acutis, posticis rectis ; 
scutello subrotundato, minutissime punctulato; elytris minutissime 
seriato-punctatis ; prosterno antice acute producto, mesosterno linea 
trapeziformi circumdato; tibiarum intermediarum apice spinoso, 
Long. 15 mm.; lat. max. 6 mm. 
Laos: Xieng Khouang (April). 
A rather narrowly elongate species with pale yellow 
transverse bands upon the elytra, of which the first reaches 
the base, partially surrounds the shoulder spot and includes 
two smaller black spots placed transversely, and the posterior 
one is narrow. transverse and tridentate both in front and 
behind. The upper surface is rather opaque, the pronotum 
especially. The sides of the latter are nearly straight and 
parallel, except in front where they are gently ‘curved. 
The shape of the scutellum of the unique specimen is 
peculiar, the margin being almost uniformly rounded except 
for the basal emargination, 
