520 Mr. T. Vernon Wollaston on the 



will be found to play an important part in the Rhyncho- 

 phorous fauna of the Malay archipelago, the L. delicatulus 

 having (as I am informed by Mr. Pascoe) been stated by 

 Mr. Wallace to be common amongst the bamboos. 



21. LAMPROCHRUS (TZOV. gen.). The superb Cossonid* 

 for which the present genus is proposed, and which was 

 discovered by Mr. Melliss at St. Helena, I admitted two 

 years ago (albeit not without some hesitation) to Microxy- 

 lobius, having been content at the time to cite it as a 

 large and aberrant member of that locally-important group ; 

 yet a closer inspection of its real structural details would 

 certainly imply that it must be treated in reality as alto- 

 gether distinct, its extremely elongate and slender rostrum 

 (which in the male sex is rather more robust and sculptured, 

 and slightly dilated before the middle, at the insertion of the 

 antenna3, much after the fashion which obtains in Mesites 

 of the true Cossonides), in conjunction with its equally 

 elongated antennas, legs, and feet (the first of which have 

 their second funiculus-joint, and the last their basal one, 

 greatly lengthened), being of' themselves more than suf- 

 ficient to establish its claims for separation. In its fusi- 

 form outline and shining, brassy surface it might well be 

 mistaken at first sight for a gigantic exponent of that 

 section of Acanthomerus in which the femora are un- 

 armed ; but the characters above enumerated (in addition 

 to its slightly pubescent body, as in certain of the Microxy- 

 lobii proper) will at once distinguish it from the members 

 of that genus. The fact, however, of its funiculus being 

 5-articulate, its scutellum obsolete, and its third tarsal 

 joint deeply bilobed, added to its fusiform outline and its 

 metallic lustre, is too significant not .to indicate its mani- 

 fest relationship with the other Pentarthrideous genera 

 (Microxy lobius proper and Acanthomerus) which are so 

 remarkably developed, as regards their specific modifica- 

 tions, in the little island of St. Helena. 



22. ACANTHOMERUS (Boheman, Res. Eugen. 141. 

 1858). The Acanthomcri, which are peculiar to the 

 island of St. Helena, may be said to be those members 

 of Microxylobius (as hitherto understood) in which the 

 body is highly polished, less sculptured, and brassy, and 

 totally free from any traces of even the minutest pubescence, 



* M. cossonoides, Woll., Ann. Nat. Hist. 403 (1871). 



