302 Mr. cin J. Arrow’s List of 
leviter arcuatis, angulis anticis paulo productis, haud acutis, posticis 
fere rectis, basi medio leviter lobato; scutello transverso, parce 
punctulato; elytris punctato-striatis, stria suturali indistincta, 
metasterno medio minute et parce, lateraliter fortius punctato, 
antennarum articulo tertio quam quarto paulo longiori, clava laxe 
articulata, angusta. 
Long. 4—6 mm.; lat. max. 2-3—3-3 mm. 
Upper Mexona R.: between Luang Prabang and 
Vientiane. 
Black, with the pronotum (except a broad median black 
stripe), the prosternum and abdomen beneath and joints 
two to four of the antennae pale yellow. 
A very abundant insect, varying considerably in size. 
In some specimens the interruption of the black longi- 
tudinal thoracic stripe produces a pattern like that of 
T. (“ Cyrtotriplax”’) oppositipunctata Gorh. and T. mot- 
schulskyi Bedel, but the yellow colour of the present species 
is much paler, and the legs and the mesosternum and 
metasternum are quite black. It is also generally larger, 
of less regularly oval shape than 7. motschulskyi, and more 
strongly punctured both above and beneath than 7’. 
oppositipunctata. 
The elytra have usually a slight brassy lustre. The 
antennae are moderately long, the third joint rather longer 
than the fourth, and the club long, narrow and loosely 
jointed. The punctures of the pronotum are finer at the 
sides than in the middle, and the lateral margins are more 
curved than in the other species here described. 
44, Tritoma atriceps, sp. n. 
Pallide flava, capite, elytris, meso- et metasterno antennarumque 
articulis 9 et 10 nigris, pronoti marginibus antica et postica medio 
plus minusve infuscatis; ovalis, nitida, convexa, capite aequaliter 
sat fortiter et crebre, pronoto paulo subtilius, punctato, clypeo 
antice leviter emarginato, pronoti lateribus subtilissime arcuatis, 
angulis anticis vix acutis, posticis rectis; elytris striato-punctatis, 
stria suturali antice valde oblique ad basin protracta, interstitiis 
sat parce punctatis, metasterni medio subtiliter et parce, lateribus 
fortius punctatis; antennis brevibus, articulo tertio ad duos se- 
quentes conjunctim fere aequali, tribus ultimis transversis, parum 
compactis. 
Long. 3:5—4 mm.; lat. max, 2—2-5 mm, 
