the Erotylid Coleoptera of Indo-China. 295 
intermediarum apice extus spinoso; abdominis apice subtus punctis 
magnis profundis marginato. 
Long. 14:5-18 mm.; lat, max. 6-7 mm. 
Upper Mrexona: Ban Nam Mo (March, April), Ban 
Thiou (March), Luang Prabang. 
The Museum contains a specimen taken by Boden Kloss 
at Korinchi, Sumatra, which appears identical with those 
taken by Mr. Vitalis. 
It is a long and rather narrow species, not very convex 
nor very shining. The head and prothorax are rather small 
relatively, and rather closely punctured, the former strongly, 
the latter finely in the middle but fairly strongly at the 
sides, with a cluster of large punctures on each side of the 
base. The rows of punctures upon the elytra are well 
marked. A peculiar and distinctive feature is a row of ten 
or twelve large deep punctures occupying the hind margin 
of the last ventral segment. The middle tibiae are acutely 
spinose at the end. The clypeus is short, the eyes large 
and separated by little more than the diameter of one of 
them. 
It has a deceptive resemblance to Megalodacne elongatula 
Crotch. 
26. Micreneaustes siamensis, sp. n. 
Nigra, subopaca, singulo elytro maculis duabus fulvis ornato, 
lunula humerali ad basin attingenti, postice bis dentata, fasciaque 
anteapicali antice tri-, postice bi-dentata, fere ad marginem externam 
attingenti; elongato-ovalis, modice convexa, capite distincte, 
clypeo fortius punctato, pronoto subtiliter punctato, lateribus bene 
marginatis, leviter arcuatis, angulis anticis acutis, posticis fere 
rectis; scutello transverso; elytris subtiliter lineato-punctatis ; 
tibiis intermediis apice haud spinosis. 
Long. 14-17-5 mm.; lat. max. 6-5-7-5 mm. 
Stam; Laos: Xieng Khouang. 
This species and M. convera are closely related to M. 
lunulata Macl., which they resemble in their form and 
markings, differing in the absence of markings upon the 
thorax. In addition M. siamensis is larger and more 
elongate, the upper surface is less shining than in MM. 
lunulata, and the puncturation of the head and pronotum 
is a little stronger. As in M. lunulata, the middle tibiae 
are not acutely produced at the end. 
