610 Mr. G. J. Arrow on a new 



Ilah. McClintock Range, Kimberlej Gold Field, Far North 

 of Western Australia. 



Tijpe. Adult male. B.M. no. 10. 12. 25. 8. Original 

 number bQ. Collected 17tli July, 1909, by J. P. Roger?, 

 and presented by the Perth Museum. Male and two females 

 examined, the latter retained in the Perth Museum. 



This subspecies differs from its nearest ally, M. r. loood- 

 wardi, of the Grant Range, further west, by its longer fur, 

 less rufous colour, and the essential identity of the two 

 sexes. 



LXXII. — Upon the Dynamopinse, a new Suhfamily of 

 Lamellicorn Beetles. By Gilbert J. Arrow. 



(Publislied by permission of tlie Trustees of the British Museum.) 



The preparation of catalogues of the less-known subfamilies 

 of Scarabajidce, which I have undertaken for the important 

 series now in course of publication, has made it necessary to 

 investigate the proper position of various obscure forms. 

 Upon one of these, described by lilr. Semenow as Dijnamo- 

 jms atltletttj I included in a recent paper (Ann. & Mag. Nat. 

 Hist. 1911, vii. p. 394) a too-hasty note, based upon dissection 

 of one of twa specimens sent to me from India for identifica- 

 tion. The specimens being in bad condition, I arrived at a 

 conclusion which I must now retract. I have since been able 

 to make a more satisfactory examination of another species of 

 the genus, and have found that Mr. Semenow's supposition 

 that the mandibles are concealed within the mouth is quite 

 correct and my allocation of this anomalous little insect to 

 the Orphnina3 is not more tenable than his to the Hybosorinse. 

 The anterior prominences of tlie head which I believed to 

 represent the mandibles are processes from the gente of an 

 altogether unique character, and the actual mandibles, unlike 

 those of any genus with which it is possible to compare 

 Dynamopus, are very small and completely concealed. 



The real position of the genus is much more problematical 

 than has been supposed. The most distinctive feature of 

 that part of the Scarabseidfe to which it has been assigned 

 consists in tlie correlation of the clypeus with the labrum and 

 mandibles, the latter being always horizontally extended 

 outside of the mouth-cavity and uncovered, a condition 

 entirely different from that found here. 



Two years later than Semenow's description, a little beetle 



