1856.] Entomological Papers. 529 



quadratic shape, etc. The remark regarding the exact number of 

 abdominal segments left uncovered by the elytra, applies to this and 

 all other species as well. The present one has generally the last 2 

 segments uncovered. 



18. Tricliopteryx invisibilis. N. 



T. ovata, subdepressa, subparallela, pilosa, supra obscure aenea. 

 subtus picea, pedibus, abdomine, antennis oreque testaceis. Long. 

 corp. vix \ lin. 



Thorax amplus, elytris sesqui minor, convexus, angulis posticis 

 humeros vix superantibus. Elytra oblonge quadrata angulis rotun- 

 datis, subdepressa, truncata, abdomen totum vel fere totum obte- 

 gentia. Coxae posticae approximate. Tarsi typicis minus elongati, 

 art. 3° praecedentibus baud multo longiore. 



Cum T. cursitante victitat ; frequenter legi. 



A very pretty and very distinguished species. Its most striking 

 peculiarity consists in the posterior coxae which are as little distant 

 from each other as those of the anterior legs, and almost touch each 

 other, and also in the shortness of the tarsi. The head with the 

 antennae, the mesosternum, the tibiae, which are incrassated in the 

 middle, and the posterior coxae with regard to their enlargement, are 

 quite typical. However, the thorax and elytra differ again from those 

 of T. cursitans (which in every respect may be looked upon as the 

 typical representative of the family in Ceylon and which is here 

 referred to as such) the former by the shortness of the posterior 

 angles which can hardly be said to envelop the shoulders, the elytra 

 by being less or not at all narrowed behind, giving an oblong rather 

 than an oval 3hape to the insect. Although in length only about one 

 half shorter, it is in bulk certainly one-fourth smaller than T. cursi- 

 tans, and although probably the smallest Ceylon beetle, it is distin- 

 guished at first sight. 



19. JPtilium sitbquadratum. JV". 



P. subquadratum, subconvexum, pilosum, obscure aeneotestaceum, 

 thorace dilutiore. Long. corp. \ lin. 



Caput mediocre. Antennarum clava art. 1° inverte conico, 2° 

 subcylindrico, ultimo elongato-ovato. Thorax convexus, augulis 



3 z 



