Mr. Westwood on neio Insects. 123 



maxillae in this sex furnished with the hook as well as in the 

 females. All my specimens of Fir/ulus and Cardanus,W., are 

 also similarly provided with the hook, but 1 have not distin- 

 guished between the sexes ; so that I cannot affirm, although I 

 fully believe, that both sexes of those two genera ai'e also fur- 

 nished with a hook, and consequently that the description 

 of Mr. MacLeay of the genus Figidus is erroneous. 



The genera in which I have found neither sex furnished 

 with the hook are Ceruchus, Platycerus, Ceratognathus, W., 

 Syndesus and Rhyssonotus. 



In Lejndodes, W., a new subgenus of Lucanns which exhi- 

 bits several of the characters of Pholidotus and Rhyssonotus, 

 I found the unique female in Mr. Melly's collection to be de- 

 stitute of a tooth. 



I also found the females of Chiasognathiis and Sphenogna- 

 thus similarly destitute of the hook, although, from their close 

 relationship with Pholidotus, I fully expected to find that they 

 possessed it. 



XVI. — Insectorum novorwn Centuria, auctore 

 J. O. Westw oou, F.L.S. 



Decadis primes Coleopterorum Synopsis *. 



Carenum, Bon.; C. Spencii. Subopacum, nigrum; tibiis anticis 

 valde palmati?, elytris excavationibus rotundatis numerosis tri- 

 plici serie (in utroque elytro) ordinatis ; spatiis intermediis ele- 

 vatis. Long. corp. lin. 9. Nova Hollandia. Mus. Melly. 



Helota, MacL. ; H. Thibetana. ^nea, lateribus cupreo-tinctis, 

 A'alde rugosa et punctata tuberculisque oblongis distincta, elj'tris 

 guttis 4'elevatis fulvis, antennis piceo-luteis, feraoribiis fulvis, 

 apicibus seneis, tibiis fulvo piceoque annulatis. Long. corp. lin. 4. 

 Habitat Thibet. Mus. Melly. 



TRiPLATOMAf, Westw., in Griff. An. K. ; T. apiccdis. Nigra, laevis, 

 prothoracis lateribus luteis macula oblongo-ovali nigra ; elytris 

 fascia valde angusta ante medium alteraque pone medium (in 

 medio interrupta) et subobliqua luteis ; apicibus apiceque ab- 

 dominis rufis. Long. corp. lin. 9^. Habitat Africa tropicali. 

 D. Raddon. Mus. nostr. Elater ccecus, Fabr., Pal. B. Col. pi. 

 7. f. 4. valde affinis. 



Sternotomis, Perch. (Sternodonta, Dej., Lap.) ; <S. amcena. Nigra, 

 opaca, pronoto maculis duabus mediis lateribusque, scutello, 

 raaculis lateribusque elytrorum viridi-lacteis, maculis duabus in 



* Figures and detailed descriptions of these insects are prepared, and will 

 be ])ublislio(l hereafter. 



f Erotylida; oblonga-, palpis niaxillaribiis siniplicibu:<. 



