Ceylon Coltoptera s 8fc. 15 



fufo-testaceo, pedibus albidis, his geniculis oreque (palpis obseurioribus 

 exceptis) testaceis. Long. corp. 2^ lin. 



Caput ad antennaruni insertionem et inter oculos utrinque profunde 

 iinpressnm. Thorax basi rugosus, ante medium utrinque uni-impressus ? 

 linea media longitudinali divisus. Elytra punctato-striata, infra humeros 

 leviter impressa. 



In ripis lacus Colombensis sub veget. putrescent, mens. Jul. non 

 infrequenter legi. Agilis est et avolare semper expeditus. 



A pretty and very interesting little insect, about whose 

 systematic position I am not quite satisfied, however I pro- 

 visionally place it towards the end of the true Lebiida3. I 

 find it most to agree with the descriptions of the g. Penta- 

 gonica S. Gr. and Rhombodera R. with neither of which, 

 however, it is identical. The head is distinguished by the 

 large and prominent eyes, and four deep impressions, two larger 

 ones at the root of the antenna?, two smaller ones between the 

 eyes, also by r a very distinct neck which connects it with the 

 thorax; the labrum is large, transverse and entire, with the 

 angles rounded off and the base narrowed; the mentum is but 

 slightly transversely emarginated, edentate ; the ligula is trun- 

 cated at the tip, the paragiossre adhere to it, reach a little be- 

 yond it, and are obtuse at the apex; the palpi are rather long 

 with the last joint elliptic, acuminate; the antenna? are strong, 

 filiform, and reach beyond the shoulders, joints 5-10 are of 

 equal length and cylindric, 4-1 1 are pilose. The most re- 

 markable part of the insect is, however, the thorax, which is 

 of a subrhomboidal shape, transverse, smaller than the head, 

 as broad again as long, it has two strong lateral angles at the 

 middle, each furnished with a strong bristle, the anterior 

 part has the sides rounded, the posterior abruptly obliquely 

 contracted, at the base it is cylindric. As a specific distine- * 

 tion of the thorax, I mention, moreover, that in the present 

 species it is impressed with two deep punctures before the mid- 

 dle and that it is rugose at the case. The abdomen is slightly 



