378 Mr. J. Nietner on new Ceylon Coleoptera, 



truncatus leviterque sinuatus. A-ntennse art. 'd° quarto sequali nisi 

 paulo breviore. Thorax am plus basi elytris applicatus, apicem versus 

 angustatus, angulis posterioribus subdepressis traiisluceutibus, ante 

 scutellum leviter sinuosus, ante sinum obsolete latitudinaliter im- 

 pressus. Elytra striata, cum thorace angustissime marginata. Pedes 

 validi, ant. tibiis apice intus uni-, intermed. et post, bi-calcaratis. 



Specimen singulum f. in ripis lacus Colombensis sub. vegetab. 

 putrescent, legi. 



As one species with a bifid mentum-tooth [O.pulcher) has been 

 already received into this genus, I have waived the hesitation I 

 should otherwise have felt in referring to it the present one, the 

 tooth of which is of a similar description. I have not seen the 

 O. pulcher ; but, as it is said to be an inhabitant of this part of 

 the world, it may possibly be identical with my species. If not, 

 they might, as the genus is otherwise pretty constant in its 

 characteristics, be separated under a new name as types peculiar 

 to India. Besides the abnormal mentum-tooth, the insect has 

 not much to distinguish it from others of the genus. The labrum 

 is, however, peculiar, being entire, or even very slightly produced 

 in the middle, with the angles rounded off; it is impressed near 

 the anterior margin with three deep punctures, the central one 

 of which is furnished with two, the lateral ones with one strong 

 bristle each. The anterior tibiae are but slightly notched. The 

 prosternum is largely developed, reaching beyond the anterior 

 coxfie, obtusely acuminated, and received in a deep excavation of 

 the mesothorax. But I doubt whether the development is suffi- 

 ciently large to entitle the insect to a place in Lonchosternus, Laf., 

 which, however, I have not seen. 



16. Trichopteryx cursitans, N. 



T. ovata, subconvexa, pubescens, supra obscure senea, elytris eeneo- 



brunneis, subtus picea, pedibus oreque testaceis, antennis art* 



S-ll nigrescentibus. Long. corp. f hn. 



Antennarum clava art. 2 primis ovatis, ultimo conico, acuminato. 

 Thorax amplissimus, elytris tertia parte minor, convexus, angulis 

 acutis, basi humeros amplectens, apice angustatus. Elytra subde- 

 pressa, subquadrata, apicem versus parum angustata, tnincata, abdo- 

 minis 3-4 segmenta ultima non obtegentia. Tibiae medio incrassatse. 

 Coxae posticee maxime dilatatee. Mesosternum carinatum. 



Sub veget. putrescent, exsiccescentibus in prov. occid. copiosa. 



A rather large species, commonly met with in this part of the 

 island, under rotting vegetable substances somewhat dried up. 

 It is very agile, and ready to take to its wings, which are of the 

 beautiful typical construction, about twice the length of the 

 body, and, in dead specimens, frequently produced behind. 

 These insects vary a little as-to shape, some being more narrowed 



