506 Mr. T. Vernon Wollaston on the 



3. STENOMMATUS (nov. gen.). The very interesting 

 little insect on which I have founded the present genus is 

 from Mexico, and has been communicated by Mr. Fry. 

 While possessing all the essential features of the Dryoph- 

 thorides (as instanced by its 4-jointed funiculus, elliptical 

 body, transverse eyes, obsolete scutellum, conspicuously 

 5-articulated feet, and minute claws), it recedes completely 

 from Dryophthorus proper (and, therefore, a fortiori, from 

 Tetratemnus) in several most important particulars,^ 

 especially however in its considerably longer, slenderer, 

 more parallel and arcuated rostrum ; in its very much nar- 

 rower and more transverse eyes (which are so narrowed, 

 and prolonged, beneath the head, as to be nearly con- 

 fluent) ; and in all its coxas, though particularly the four 

 posterior ones, being more widely separated. In other 

 respects it differs from Dryophthorus in its smaller size 

 and still more elliptic outline, which is a good deal at- 

 tenuated at its hinder apex; in its surface (instead of 

 being unequally besmeared with a kind of coarse, mud- 

 like, scaly deposit) being densely and evenly covered with 

 an extremely fine, velvety, somewhat silken, cinereous 

 pubescence ; in its elytra not being cariniform at their 

 extremity, though with their second costa (or raised costi- 

 form interstice) more conspicuously elevated, or prominent, 

 behind ; in its antennas (particularly as regards the scape) 

 being longer, and with the club more developed ; and in 

 its metasternum being a little shorter. 



4. DRYOPHTHORUS (Schonherr, Cure. Disp. Meth. 

 332. 1826). Although I have had no opportunity of 

 examining them, I believe that the majority of the species 

 which have been referred to Dryophthorus are generically 

 distinct from the European D. lymexylon, which is ex- 

 pressly stated to be the type of the group ; and I suspect 

 therefore that the genus Tetratemnus , which I lately enun- 

 ciated in order to receive an insect which was taken abun- 

 dantly by Mr. G. Lewis in Japan, will be found eventually 

 to embrace them. Be this however as it may, the genus 

 Dryophthorus, as represented by its acknowledged type, 

 is too well known to require comment ; suffice it to observe 

 that the various published diagnoses of it (not even ex- 

 cepting that of Lacordaire) appear to me to be at fault in 

 their definition of some of its most important characters, 

 the result apparently of their having been drawn out, not 

 from the type alone, but partially also from some of the 



