72 



JOURNAL R. A. S. (CEYLON.) [Vol. III. 



tinguished by the shape of the ligula. From both Amblystomus 

 and Acupalpus, the present genus moreover differs in the vesture 

 of the four ant. tarsi of the male, the first joint being naked below 

 and in the mandibles, the left one of which is much larger and 

 plumper than the right one, protruding from under the labrum, 

 whilst the latter is hidden by it, the former is at the same 

 time obtuse at the apex whilst the latter is pointed. In the 

 M . Indicus this peculiar construction is hardly striking, but in 

 the other two species it is very noticeable, and imparts a curious 

 appearance to the head of the insect. 



64, Megaristemjs mandibulars. N. 



M. piceo-niger leviter metallesceias, subtus brunneus, antennis, tibiis 

 "tarsisque testaceis, ore brunneo ; long, corp 1^-2 lin. 



Capite inter antennas 2-foveolato, mamdibula sinistra robustissima por- 

 xecta, dexter a mediocri labro obtecta ; thorace basi 2-foveolato, linea 

 tongitud. utrinque abbreviata media diviso, antice lunate impresso ; 

 -scutellomajore ; elytris obsolete striatis, striis juxta suturam distinctior- 

 ibus, cum thorace parce subtiliterque punctulatis, inter med. et apic. ad 

 -gtriam 2 m puncto impresso. 



Prope Colombo rarus. 



65. Megarxstertjs stenolophoides. N. 



H. brunneo-piceus elytris ©bscurioribus metallescentibus maculis 4 

 flavis, margine suturaeque apice brunneis, pedibus, antennarum basi pal~ 

 pommqae apice pallide testaceis, ore, mamdibulis brunneis exceptis, 

 testa ceo; long. corp. 1£ Ira. 



Praacedenti similis corpore robustiore minus depress© et colore facile 

 tamen distinguendus. Differt prseterea palpis max. art. 4° minus dis- 

 tincte, lab. eodem fortius truncato ; thorace magis transverso basi ob- 

 selete ruguloso ; elytris profundius striatis, puncto ad striam 2 m fere 

 obsoleto, com thorace haud punctulatis, maculis 4 subobliquis flavis : 2 

 humeralibus in interstitiis 5-6, 2 subapicalibus in interstitiis 3-4. 

 Prope Colombo rarus. 



66. Megaristertjs indicus, JV. 



M. obscure viridi-seneus elytris maculis 2 humeralibus obliquis pus- 

 tulisque2 subapicalibus flavis, subtus brunneus tibiis tarsisque testaceis, 

 antennarum basi oreque brunneo-testaceis ; long. corp. 1^ lin. 



Differt a M. mandibular! mandibula sinistra altera vix robustiore? 

 elytris infra humeros inter marginem et striam 2 m macula obliqua iutus 



