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with the claws unequal in either sex; the description of the- 

 front tibiae reads like that of an Automolus rather than a- 

 Heteronyx. If those difficulties be waived it seems probable 

 that the hind claws are bifid as the front claws of the male 

 are said to be, and in that case the species falls into Group 

 VII. of Heteronyx, and is probably not far removed from H . 

 bidentatus, Blackb. The locality assigned to pellucidus is 

 South Australia, where, however, I have no evidence of the 

 occurrence of any species near bidentatus, and certainly it 

 would not be practicable to identify II . pellucidus except by 

 means of a specimen taken in Burmeister's locality. I con- 

 clude, therefore, that this species must remain an enigma 

 until the type can be re-examined, or some insect agreeing 

 with the description in respect of sexual characters can be 

 found . 



II. siccus, Blackb., and H. Gowelli, Blackb. These species 

 were described as having bifid claws, and, therefore, might 

 be looked for in this Group ; their claws cannot, however, be 

 considered bifid according to the more exact, definition of 

 terms that I have adopted for the purpose of the present 

 Revision, and I therefore transfer them to Group VIII. H. 

 Gowelli is, however, as noted under Group VIII., a synonym 

 of //. concolor, Macl. 



II . infuscatus, Macl. This species — the type of which I 

 have examined in the Australian Museum— is very close to 

 //. rotundifrons, Blackb. The distinction of labrum referred 

 to in the tabulation is much like that between II . granulatus 

 and maurulus of Group VI. (which is discussed under the 

 heading of II. maurulus), and further differences are found 

 in the notably smaller size of H . infuscatus, the considerably 

 better-developed trilobed outline of the head in that species, 

 its notably more convex frons, and its front tibiae much more 

 strongly and sharply dentate externally. 



II. subfuscus, Macl. This species seems to be widely dis- 

 tributed in tropical Australia. 



II. div (-weeps, Blackb. This is the only Heteronyr, 

 known to me as occurring in Tasmania with bifid claws, and 

 even of this species the claws cannot be called strongly bifid. 

 As noted in the original description, this species is extremely 

 difficult to place satisfactorily in any Group, and in my for- 

 mer Revision of this genus I assigned it to the "Intermediate" 

 Group (now abolished), stating that the front of its head did 

 not show a trilobed outline. That statement is not strictly 

 correct, for (although from the ordinary point of view for 

 examining the outline of the head that outline looks like an 

 even curve) a threefold convexity is certainly visible if the 

 head be viewed less obliquely — i.e., from more directly above 



