Melolonthine Beetles of Ceylon. 433 
Brahmina flavipennis, Moser, Deutsche ent. Zeits, 1913, p. 276. 
Mucrotrichia eurystoma, Burm.= (‘‘ Rhizotrogus”) exactus, Walk., and 
M. parva, Brenske. Brenske applies the name evxacta to small 
specimens of eurystoma, but the latter name is used by him for the 
following species. 
M. furcifer, sp.n. This species, of which the male has a long antennal 
club and a remarkable pair of prongs at the end of the abdomen, has 
been carefully described by Brenske (Berl. ent. Zeit. xxxvii, 1892, 
p- 176) under the name of M. eurystoma, Burm. Burmeister’s com- 
parison with Rhizotrogus ruficornis, the words “nitidus” and 
“olanzend,” and particularly the “kurzborstig” clothing of the 
body beneath clearly exclude the present insect. 
Mrerotrichia ( Rhizotrogus”) costata, Walk.= M. puttalama, Brenske. 
M. singhalensis, Brenske. 
Idvochelyna, gen. noy. (* Isonychus”) pectoralis, Walk. 
The genus Periserica is represented in the recent ‘ Cata- 
logue ot the Melolonthinz’ by only two species, of which one 
— Omaloplia fracta, Walkezx—really belongs to the Ruteline. 
Walker actually described three species ot the genus, which 
he distributed amongst three different genera, and six are 
now known to me, all inhabitants of Ceylon. They will, 
perhaps, be recognizable from the following key :— 
1 ( 8). Upper surface pruinose. 
2 ( 5). Form short and globular. 
3 ( 4). Sides of the pronotum yellow........ picta, Brenske. 
4 ( 3). Sides of the pronotum not yellow.... ventralis, Walk. 
5 ( 2). Form more elongate. 
6 ( 7). Pronotum and elytra yellow and black. fulvostriata, Brenske. 
ie ©). Wilytre entirely black... os. oie os cee nigripennis, Sp. D. 
8 ( 1). Upper surface shining. 
9 (10), Etytra pale, with dark marks ...... .. wtmterrupta, Walk. 
10 ( 9). Klytra black, with small yellow marks. subsiynata, Walk. 
Periserica nigripennis, sp. 0. 
Nigra, capite pronoto scutelloque leviter cupreo-micantibus, pronoto 
prope marginem anguste tlavo-vittato, elytris opacis, sericeis ; 
elongata, tere oblonga, corpore supra parcissime sat longe setosa, 
capite parce punctato, clypeo medio tumido, margine antico tere 
recto, fronte medio fere carinato; pronoto modice punctato, 
lateribus vix arcuatis, angulis anticis paulo productis, posticis 
leviter rotundatis ; scutello parcissime punctato ; elytris striatis, 
striis minute parum regulariter punctatis, intervallis convexis, 
parce punctatis; pygidio modice punctato, subsericeo ; tibiis an- 
ticis tridentatis : 
3, antennis 4-lamellatis, lamella prima paulo abbreviata. 
Long. 8 mm.; lat. max. 4°90 mm. 
