jan. — ma it* 1857.] Descriptions of new Ceylon Coleopter a. 187 



prosternal part has a sharp edge, whilst the mesosternal one is ob- 

 tuse on the back and the metasternal part depressed and slightly 

 grooved. 



29. Hydrous inconspicuus . N. 

 H. preecedente minus convexus, supra oleagino-niger, subtus 

 rufo-piceus, ore testaceo. Long. corp. 4 j lin. 



Palpi maxill. art. 2° et 4° subcylindricis, 3° apicem versus 

 sensim incrassato, sequente tertia parte longiore. Antennae art. 

 7-8 sub-globosis, 9° magno, ovato. Caput, thorax et elytra ut in 

 prsecedente sculpta et signata. 



In lacu Colomb. mens. Jun, non infrequenter cepi. 



This is in every respect a normal species. The prosternal carina 

 has a sharp edge, the claws are simple, the antennal club is com- 

 posed of rounded joints, the elytra are of the typical structure etc. 

 In the latter respect as well as with regard to the various series of 

 punctures upon head, thorax and elytra, it resembles the former, 

 the punctures of the elytra are, however, less distinct. Joints 1-6 

 of the antennae are yellowish, the club being dark and finely pu- 

 bescent, The maxill. palpi have joints 2 and 4 subcylindric but 

 the intermediate one thickened towards the tip. 



In the month of June, I have not unfrequently taken the pupae of 

 this species on the banks of the Colombo lake and hatched them 

 at home. I found them about one inch under ground and often as 

 far as 12 feet from the edge of the water but still in muddy places. 

 The imago is very active, perhaps more so than any other species 

 of the g. 



No. III. 



GENERAL REMARKS ON THE SCYDMiENI DESCRIBED BELOW. 



In the first number of these papers I have described a winged 

 species of CEdichirus, a g. supposed to be without organs of flight ; 

 in the second number I have given publicity to the more important 

 discovery of wings in the single g. which forms the family of the 

 Georyssiy also hitherto supposed to be apterous ; at present I am 

 about to announce to some and to confirm to others, the existence 



