of the, less-known groups of Lamellicorn Goleoptera. 503 



In the British Museum there is a specimen of another 

 Argentine species, not in sufficiently good condition for 

 description, and a careful examination of all the Australian 

 examples of Pkaenognatha I have been able to bring 

 together has led me to distinguish six species, all of which 

 are now represented in the National collection. The 

 species of Aclopus are still more numerous, but specimens 

 in good condition are rare. I have described only one 

 new species. 



In comparing the mouth parts of P. Jenseni with those 

 of P. Erichsoni, Hope, Dr. Heller has relied upon West- 

 wood's figures, which are not in every particular accurate. 

 The last joint of the maxillary palpus is not shorter than 

 the preceding joint, but distinctly longer, as it is in 

 P. Jenseni. The Phaenognatha from Rockhampton 

 examined by Dr. Heller is not Hope's species but 

 P. aeqiiistriata, one of the forms here described. 



The body is rather soft and plastic in these beetles, and 

 owing to their rarity it is difficult to determine what 

 features are most constant and significant from the 

 systematic point of view. The genitalia are little chitinized 

 and of very simple form, affording no assistance in the 

 discrimination of the species. I have already mentioned 

 that males only have so far been found, and so few of these 

 exist in European collections that no satisfactory system- 

 atic study is yet possible. It is to be hoped that closer 

 investigations by collectors will soon enable the present 

 rather tentative survey to be superseded. 



The following short diagnosis of the typical species is 

 drawn from the type specimen in the Oxford Museum. 



Phaenognatha Urichsoni, Hope. 

 Trans. Ent. Soc, Vol. IV, 1845, p. 113, PI. VI, fig. 5. 



Testaceo-rufa, elytris, margine antico excepto, nigris ; corpus sat 

 latum, clypeo projie raarginem anticum cornu recurvato apice 

 acuminato armato, pi'othorace lato, elytris sat bre^^.bus, postice valde 

 attenuatis, profimde geminato-striatis, striis punctatis, interstitiis 

 alternis latis, irregulariter punctatis, apicibus intiis subangulatis, 

 tarsis posticis longissimis, unguibus minutis. 



Long. 15 mm. Lat. max. 8-9 mm. 



Hah. North Australia : Port Essington. 



TRANS. ENT. SOC. LOND. 1909. — PART IV. (DEC.) L L 



