520 Mr. T. Vernon Wollaston on the 
■u'ill be found to play an important part in the Rliynclio- 
jiliorous fauna of the ]\Ialay archipelago, the L. delicatnlus 
having (as I am informed by jNIr. Pascoe) been stated by 
Mr. Wallace to be common amongst the bamboos. 
21. LA]\rPROCHRUs(7?oy. <7en.). — 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- 
lohius, — having been content at the time to cite it as a 
large and aberrant member of that locally-important grou]) ; 
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 sculptiu-ed, 
and slightly dilated before the middle, at the insertion of the 
antennne, much after the fashion which obtains in 3Iesi'fes 
of the true Cossomdes), in conjunction with its equally 
elongated antenna?, legs, and feet (the first of Avhich 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 Acantltomerus in which the femora are un- 
armed ; but the characters above enumerated (in addition 
to its slightly pubescent body, as in certain of the Microxi/- 
loliil proper) will at once distinguish it from the members 
of that genus. The fact, however, of its fiiniculus being 
5-articulate, its scutellnm 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 Avith the other Pentarthrideous genera 
(^Microxyloblus proper and Acantltomerus) which are so 
remarkably developed, as regards their specific modifica- 
tions, in the little island of St. Helena. 
22. AcANTiiOMERUS (Boheman, Res. Eugen. 141. 
1858). — The Acanthomcri, which are peculiar to the 
island of St. Helena, may be said to be those members 
of IMicroxijIohius (as hitherto luidcrstood) in which the 
body is highly polished, less sculptured, and brassy, and 
totally free from any traces of even the minutest pubescence, 
* .1/. cossonoides, Woll., Ann. Nat. Hist. 403 (1871). 
