. 
294 Mr. ot. J. Arrow’s List of 
24. Micrencaustes apicalis, sp. n. 
Nigra, pronoto rufo, margine irregulari punctisque duobus 
discoidalibus nigris exceptis, elytrorumque macula subapicali antice 
bisinuata rufa; elongato-ovata, convexa, capite sat magno, haud 
dense punctato, oculis magnis, remotis, pronoto convexo, parce 
subtilissime punctulato, lateribus arcuatis, antice et postice con- 
tractis, basi fortiter trisinuato, utrinque area triangulari profunde 
punctata signato; scutello lato; elytris distincte lineato-punctatis ; 
tibiis intermediis apice extus acute spinosis. 
Long. 13-17 mm.; lat. max. 5-5-7 mm. 
Upper Mexone R.: Ban Thiou, Sala Pang Yok (March), 
Nam Mat (April), Luang Prabang. 
One of the group of species with the apex of the middle 
tibia acutely produced. 
The pronotum is convex and very smooth, scarcely 
broader behind than in front, its sides evenly rounded, the 
base having on each side a strongly punctured area of 
triangular shape extending to about one-third the length 
of the pronotum. The prosternum is not very sharply 
pointed in front, and the mesosternum is transversely 
rectangular, with an impressed stria, nearly straight in 
front and at the sides. 
This species has the closest resemblance to M. litwrata, 
but in addition to the presence of a red apical spot upon the 
elytra (not a sublateral stripe, as in MW. litwrata) and the 
fusion of the two red marks upon the pronotum, the head 
is rather larger, the eyes larger and rather farther apart, 
the prothorax more shining and convex, its sides more 
strongly rounded, the microscopic puncturation sparser, 
and the large punctures on each side of the base extend a 
little farther forward. The lines of punctures upon the 
elytra are rather less fine and close. 
25, Mierencaustes elongata, sp. n. 
Nigra, parum nitida, singulo elytro maculis duabus rufis ornato, 
lunula humerali intus late haud longe producta ad basin atque 
marginem lateralem attingenti lunulaque anteapicali fere ad margines 
internam et externam attingenti; angusta, parum convexa, capite 
crebre punctato, pronoto ubique subtiliter sed distincte punctato, 
utrinque ad basin fortiter et copiose punctato, lateribus vix arcuatis, 
antice convergentibus, angulis anticis acutis, posticis fere rectis; 
scutello transverso; elytris discrete seriato-punctatis; tibiarum 
