EubryeJiius.] RHYNCHOPHORA. 373 



with the club elongate, and are inserted in the middle of the rostrum ; 

 the thorax is ohsoletely channelled and furnished with four tubercles ; 

 this insect and Litodactylu* Icucoytster in both the larval and perfect 

 state appear to live almost entirely under water; they resemble the 

 species of Phytobius in constiueting cocoons in which to undergo their 

 final transformations, but differ from them in the fact that they form 

 their cocoons on their food plant under the surface of the water, whereas 

 the species of Phytobius construct them above the surface ; the follow- - 

 ing note on the habits of the species was published by myself in the 

 Entomologist's Monthly Magazine, xxii. p. 186 : " At the November 

 meeting of the Entomological Society, Mr. C. 0. Waterhonse exhibited 

 some living specimens of Etibrychius velatu<s, Beck., in order to show 

 that they swim with their hind legs after the fashion of a Dytiscide, 

 or a frog ; these specimens he kindly gave me after the meeting, and I 

 kept them alive for some time ; they were not only able to swim on 

 the surface but could dive beneath it, and although their natural 

 buoyancy appears'to force them upwards yet they are able to dive quite 

 far enough to seize the aquatic plants, to which they cling, in case they 

 do not project above the surface ; if they do, they prefer to seize them 

 near the surface and crawl down them ; a short while afterwards Mr. 

 J. J. AYalker sent me two living Litodactylus leucogaster ; these swim 

 in exactly the same way as JE. velatua, except that their buoyancy 

 seems to be somewhat greater, and their power of diving br-Iow the sur- 

 face somewhat less in consequence. These sub-aquatic Curculionid<B 

 seem to be able to sustain life under water as well as, if not better 

 than, the Dytiscidse. As I was going from place to place at the time 

 Mr. ^aterhouse gave me his specimens, they were often corked up in a 

 small tube of water for many hours together, but did not seem to be 

 any the worse." 



E. velatus, Beck, (aquaticus, Thorns.). Short, convex, black, 

 thickly clothed both on the upper and underside with greenish yellow 

 scales, which become much duller after death; the head, sides and 

 central line of thorax, and sides and suture of elytra are more closely 

 covered than the rest of the upper surface, which is darker, and except 

 in quite fresh specimens, more or less denuded ; antennae and legs clear 

 yellow, except the extreme apex of the former, and the knees and apex 

 of part of the tarsal joints and of the claws, which are black ; thorax 

 broader than long, narrowed in front, but not constricted, very closely 

 pimctured, obsoletely channelled, with two small tubercles on anterior 

 margin, and a larger one on each side before base ; elytra short and 

 broad, much broader than thorax, with the shoulders rounded but 

 prominent and well marked, striae deep, interstices broad, the fifth 

 somewhat raised at base ; legs long. L. 2-2| mm. 



In stagnant or slowly moving water ; on aquatic or snb-aqnatic plants, 

 especially Potamogcton, Hippuris and Myriophyllum ; the larva has been observed 



