88 Mr. J. Walton on the genus Rhynchites. 



tennae inserted between the middle and the apex of the rostrum ; 

 thorax anteriorly armed on both sides with a porrect spine; 

 scutellum in both sexes very large, and the margin elevated. 

 The $ has the head shorter and broader than the S ; the an- 

 tennse inserted in the middle of the rostrum, the thorax less di- 

 lated at the sides and very little narrowed in front, oblong, sub- 

 cylindric, unarmed. 



c^ ? in the cabinet of the British Museum and in that of the 

 Entomological Society, Mr. Stephens^s and my own. 



" Taken in numbers on the Prunus spinosa at Crayford in 

 Kent by myself.''— Marsham MSS., Steph. 111. 



(^ ? , in the cabinet of the Entomological Society, are from 

 the collection of the Rev. Mr. Kirby. 



Mr. Stephens had his specimens, with many others of this 

 and the following species, from the Marshamian collection. I 

 obtained mine from the cabinet of the late Mr. Millard. 



The S of this species, figured by Donovan, "was taken in 

 the middle of June in a field near Kent.'' 



This species has the usual sexual characteristics so generally 

 developed throughout this extensive family of insects. 



Schonherr's ^ Synonymia Insectorum,' vol. v. p. 325, contains 

 an observation that the Comte Dejean, in a letter to Gyllenhal, 

 asserts that he is convinced, from his own experience, that the 

 species with the thorax armed are the males, having taken pairs 

 in copula. 



Gyllenhal, Schonherr and other authors appear to have mis- 

 taken the sexes of this species. 



17. R. Bacchus, Linn., Schonh. 

 Cure. Bacchus, Mus. Linn. 



Splendid golden copper, with a shade of purple, shining, and 

 covered with erect fuscous hairs. Head between the eyes deeply 

 impressed ; vertex convex, deeply and coarsely punctured ; short, 

 subquadrate. Eyes very prominent. Rostrum elongate, slender ; 

 longer than the head and thorax together ; almost straight above ; 

 at the base with two deeply impressed striae which are punctate ; 

 the interstice forming an elevated ridge or carina which is entirely 

 of a violaceous black. Antennae inserted a little before the middle 

 of the rostrum, the joints dark violaceous, the club dusky black ; 

 thorax rounded at the sides; above convex; constricted at the 

 base and apex ; subglobose ; of a shining golden purple ; deeply 

 and thickly rugose ; punctate anteriorly ; under both sides with 

 a rudimental minute spine. Elytra of a shining golden copper ; 

 indistinctly striated ; the striae with rows of large deep punctures ; 

 the interstices with smaller punctures, transversely rugose and 

 elevated. Legs elongate ; femora clavate ; shining golden purple. 

 Tibiae golden purple. Tarsi violaceous black. — (Long. corp. 4 lin.) 



