342 Mr. T. V. Wollaston on Additions to Madeiran Coleoptera,. 



sant's genus Enneadesmus, which was separated from Xylopertha 

 solely on account of the former character, has to be suppressed. 



4. Tychius albosquamosics (Ins. Mad. 345). — Having had occa- 

 sion lately to re-examine with greater care the unique specimen 

 of this insect which was captured on the Deserta Grande during 

 May of 1850, and to compare it with examples from the Cana- 

 ries, I believe that it is not a Tychius at all, but should be re- 

 ferred to the genus Smicronyx of Schonherr. It appears iden- 

 tical with a small Curculionid which I took, four years ago, in 

 the intermediate elevations of Teneriffe, and which must con- 

 sequently be quoted as the Smicronyx albas quamosus. Apart 

 from minuter distinctions, Smicronyx may be known from Ty- 

 chius by its more sunken eyes, and by its claws being approxi- 

 mated at their base, whereas in the latter they are not only 

 distant, but are even furnished with a little intermediate appen- 

 dage. The species are, on the average, somewhat smaller and 

 less scaly than the Tychii ; their prothorax is much more finely, 

 and not so thickly, punctured ; their elytral strise are less de- 

 cidedly crenulated, being often quite simple ; and the spine at 

 the inner apex of their tibiae is a trifle more developed, whilst 

 even the outer angle also is rather more prominent and spinu- 

 lose. The unique Desertan example, now in the British Museum, 

 being in exceedingly bad condition, from its having been taken 

 dead and mutilated, it is much to be hoped that fresh specimens 

 may ere long be brought to light, through the indefatigable 

 researches of Mr. Bewicke, whose success amongst the minute 

 Coleoptera of the Madeiran islands has been so remarkable. 



5. Atlantis clavatus (Ins. Mad. 363). — For the reasons stated 

 above, under the Laparocerus undulatus, I believe that this insect 

 will be better referred to Laparocerus than to Atlantis, It 

 should therefore be cited as the Laparocerus clavatus. 



6. Helops. — According to information which I have received 

 lately from Dr. Schaum, who has had occasion to examine criti- 

 cally certain types of the Heteromera in the collection of the late 

 Dr. Germar, the names of no less than three of the Madeiran 

 Helnpes will, in right of priority, have to be changed, the species 

 having apparently been described by Kiister in 1850, i. e. four 

 years previous to the publication of my ^ Ins. Mad.^ Assuming 

 therefore Dr. Schaum's identification to be correct, for the H^ 

 confertusy WolL, we must read asper, Kiist. ; for the H, Pluto j 

 WoU., gagatinuSy Kiist. ; and for the H. cinnamomeus, WolL, 

 graniger, Kiist. It appears that " the asper was described as a 

 Madeiran insect, but that the other two are stated erroneously 

 to come from Portugal.^' 



