28 



Descriptions of New 



23. Hydrous inconspicuus. N. 



H. preecedente minus convexus, supra oleagino-niger,subus rufo-piceus, 

 ore testaceo. Long. corp. 4£ lin. 



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

 incrassato, sequente tertia parte longiore. Antennas art. 7-8 sub-globosis, 

 9° roagno, ovato. Caput, thorax et elytra ut in prascedente sculpta et 

 signata. 



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



This is in every respect a normal species. The pro-sternal 

 carina has a sharp edge, the claws are simple, the antennal 

 club is composed of rounded joints, the elytra are of the typi- 

 cal 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 antennas are yellow- 

 ish, the club being dark and finely pubescent. The maxill. 

 palpi have joints 2 and 4 subcylindric, but the intermediate 

 one thickened towards the tip. 



I have not seldom in the month of June taken the pupas 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 Scydmjexi 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 



