the Erotylid Coleoptera of Indo-China. 299 
front but is rounded and has a marginal stria, complete 
except at the hind margin, the mesosternum is very short 
and has a semicircular stria, the metasternum is finely 
punctured, the abdomen closely punctured, and the coxal 
lines of the basal segment are long and continued parallel 
to the hind margin almost to the sides of the abdomen. 
35. Aulacochilus fratereulus, sp. n. 
Niger, singulo elytro fascia lata basali aliaque anteapicali parva 
arcuata fulvis ornato, fascia basali maculas 4 minutas includenti, 
quarum duabus internalibus, tertia humerali ad basin, quarta ad 
marginem externam sitis; oblongo-ovatus, convexus, haud nitidus, 
capite fortiter, pronoto subtilius punctato, hujus marginibus 
lateralibus bene elevatis, leviter arcuatis; elytris minute striato- 
punctatis, interstitiis subtilissime punctulatis; prosterno haud 
acuminato aut elevato, utrinque stria brevi inciso, mesosterno sat 
brevi, utrinque brevissime striato, metasterno abdomineque subtil- 
iter punctulatis, hujus segmento primo ventrali utrinque linea 
arcuata fere ad marginem posticam attingenti inciso. 
Long. 6-5—8 mm.; lat. max. 3-5—4:5 mm. 
Upper Mexone R.: Ban Pan (May), Tong Lap (April), 
Pou Bia (Jan.), Luang Prabang (April). 
This closely resembles A. vitalisi Arrow and episca- 
phoides Gorh., but is smaller and a little more elongate 
than the former and a little less so than the latter. The 
pattern is almost that of A. episcaphoides, but the ground- 
colour is black without blue tinge, the outlines are less 
sharply defined and the apical patch is produced back- 
wards externally almost to the apices of the elytra. The 
prosternum is scarcely elevated in front, and not at all 
sharply pomted. It is longitudinally impressed and 
bordered by long striae which converge without meeting. 
The coxal lines of the first ventral segment are continued 
almost to the hind margin of the segment, where they are 
sinuous. 
36. Aulacochilus vitalisi, sp. n. 
Niger, parum nitidus, elytris fulvis, singulo marginibus suturali 
et externali, maculis duabus basalibus, duabus antemedianis (quarum 
interiori cum marginem suturalem plus minusve confusa), fascia 
postmediana extus dilatata ad margines internam et externam 
attingenti guttaque apicali cum margine conjuncta ornato; ovalis, 
convexus, pronoto paulo deplanato, irregulariter sat fortiter punc- 
