56 



My xmique specimen is a male, and my two examples of 



uiiici/.-- ai'e females. Specifically they are certainly distinct; 

 inter alia multa, the prothorax of Ftrkiimi having well-de- 

 fined hind angles, and sides only feebly arched — so that the 

 lateral outline viewed from the side appears quite straight ; 

 vv^hile the prothorax of uuiciis has hind angles rounded off, 

 and sides quite strongly roviuded — so that the lateral outline 

 viewed from the side appears strongly arclied downward. It 

 is probable, however, that the following differences are sexual 

 and distinguish the sexes of all these three species — r/~., 

 pygidium much less nitid, tarsi stouter and much longer, 

 basal joint of hind tarsi notably longer, in the male than in 

 the female. I have not a specimen of Fraf/f/affi before me, 

 but have notes made when I inspected the tyjoe, which, how- 

 ever, do not mention the sex. The jDrothorax of Frac/f/afti 

 resembles that of Ferkiiisi in outline, but the dorsal surface is 

 considerably less closely punctulate in all parts and the basal 

 joint of the hind tarsi is not shorter than the 3rd joint, which 

 is extremely unlikely to be the case in the female of Fcrkinsi, 

 the male (in all instances known to me of sexual difference in 

 the hind tarsi of Hcteroni/x) having the longer basal joint. 

 The elongate hind claws apjDendiculate almost exactly in the 

 middle of their length are common to these three species, and 

 are unusiial in Heteronyx. 



North Queensland (Mr. Perkins). 

 //. niiindus, sp. nov. Modice elongatus, postice sat dilatatus : 

 sat nitidus ; ferrugineus, supra pilis perbrevibus sub- 

 erectis minus crebre vestitus ; clypeo confertim ruguloso 

 antice rotundato ; labro summ.o clypei planum haud at- 

 tingenti ; fronte fortiter crebre rugulose punctulata : 

 clypeo fronteque ut plana sat disparia visis ; antennis 9- 

 articulatis, articulo 3° quam 2^^ g^t breviori ; prothorace 

 quam longiori ut 15 ad 8 latiori, antice fortiter angus- 

 tato, supra sat fortiter minus crebre punctulato (punc- 

 turis circiter 16 in segmenti longitudine), lateribus 

 modice arcuatis, angulis anticis sat acutis modice pro- 

 ductis posticis (superne visis) obtusis, basi nonnihil bi- 

 sinuata, margine basali sat forti sat sequali ; elytris sat 

 fortiter minus crebre punctulatis (trans elytron puncturis 

 circiter 22), costulis 2 obtusis vix manifestis instructis ; 

 ])ygidio subopaco granulis setiferis sparsius instructo ; 

 coxis jDosticis quam metasternum multo brevioribus quam 

 segmentum ventrale 2""^ paullo longioribus ; tibiis anticis 

 extus tridentatis : tarsorum posticorum articulo basali 2" 

 sat aequali quam 3"s sat longiori ; femoribus posticis inter 

 jnincturarum series haud punctulatis : unguiculis appen- 

 diculatis. Long., 4f 1. ; lat., 2f 1. 



