BY R. J. TILLYARD. 35 



Tasmania; but it is rather the exception than the rule for any 

 of these contour-lines to reach into New Guinea. In the Odonata^ 

 the group Synthemina is the only one known to me whose contour 

 embraces both Tasmania and New Guinea. 



Another variation of the Ilolonotian contour has a zoocentre 

 tending to be located more northwards, usually in Northern New 

 South Wales, or in South Queensland. In such cases, (e.g., 

 Diphlehia) the contour may reach to New Guinea, but not into 

 Tasmania, and generally does not exhibit any Hesperonotian 

 portion. 



Besides the Holonotian contour, representative of so many 

 Australian groups, we find other types of entogenic contours. 

 Unfortunately, the records available are not sufficient for the 

 actual construction of these contours, but only sufficient to 

 indicate broadly their existence. ' One of these may be termed 

 the Fapuan contour, and has its primary zoocentre located in 

 Papua. The lower contour-lines spread out over the surrounding 

 islands, and also down into Queensland, that portion of the 

 contour appearing very similar to the ectogenic Torresiau contour 

 already defined — in fact, a group with Papuan contour may 

 rightly be considered as entogenic in Papua, but ectogenic in 

 Queensland, if it is desired to contrast the fauna of Papua wath 

 that of Australia proper. Again, in the case of strong-flying 

 insects, one or more of the outermost contour-lines may reach 

 beyond Wallace's line into the Oriental Region proper, and 

 especially into Celebes, which appears to be a kind of link 

 between the two regions, receiving both Oriental and Australian 

 forms. 



In the Odonata, the genus Argiolestes has a Papuan contour. 

 There are a large number of species in Papua, and probably 

 many more to be discovered. One species, at least, reaches to 

 the Celebes. This group has, however, extended down into 

 Australia itself far more vigorously than would be usually 

 expected in the case of a tropical group, and is actually in pro- 

 cess of budding off a distinct Holonotian contour, having a 

 secondary zoocentre in Northern New South Wales with five 

 species; and also a single species occurring in Western Australia. 



