516 Mr. T. Vernon Wollaston on the 



and sometimes minute, insects for which the present genus 

 is proposed appear to have been confounded hitherto with 

 Catolethrus into which they seem to have been admitted 

 as abnormally small members ; and, in accordance with 

 this, a very pallid and diminutive one, from Cuba, has 

 been communicated by Mr. Pascoe with a very old label 

 appended to it, bearing the name "Catolethrus palmeus, 

 Schon." There is no species, however, of supposed Cato- 

 lethrus, so far as I can ascertain, which bears that specific 

 title, either in the ( Genera Curculionidum' or the Munich 

 catalogue ; and I am compelled, therefore, to conclude 

 that it is an unpublished one ; yet the fact itself tends 

 nevertheless to prove that the exponents of the present 

 genus have, as just mentioned, been associated inadver- 

 tently with the Catolethri. But in reality, when closely 

 inspected, they will be seen to belong to even a "different 

 subfamily from the latter, their 5-jointed funiculus as- 

 signing them at once to the Pentarthrides. In addition, 

 however, to this primary distinction, Stenotrupis recedes 

 from Catolethrus in the insects which compose it jbeing 

 smaller and narrower ; in their head being much longer, 

 thicker, more oval and very much more exserted (or ex- 

 posed) ; in their rostrum being slenderer still, a little 

 widened towards the tip, and not appreciably divided from 

 the forehead; in their prothorax being more triangular, 

 and less constricted behind its apex; in their scutellum 

 being less conspicuous ; in their elytra being minutely 

 pubescent at the apex ; in their four hinder legs being 

 shorter ; in all their coxaa being equally separated, or 

 apart ; and in the third joint of their feet being unex- 

 panded and simple. 



In point of fact, however, Stenotrupis is much nearer 

 to Pentarthrum, particularly to such members of it as 

 the P. angustissimum, from Japan; yet its species are 

 still narrower and more depressed ; their head is longer, 

 thicker, oval and exserted ; their rostrum (particularly in 

 the female sex) is more elongated and slender, and appre- 

 ciably widened in front; their eyes (instead of being 

 rounded and prominent) are completely sunken, ovate 

 and 'more approximated above ; their prothorax is more 

 triangular and less constricted behind its apex ; their 

 elytra are minutely pubescent at the tip ; their legs, par- 

 ticularly the four posterior ones, are much shorter ; and 

 their coxas are, all of them, equally separated. 



In all probability Stenotrupis will be found to have a 



