BV R, J. TILLYARD. 



61 



Here, then, we have an instance of an entirely artificial sub- 

 division into two tribes, Balmesini and Psychopsini. We may 

 well ask, what is the essential point in the subdivision"? Is it 

 to divide the Asiatic from the Australian species'? If so, then 

 the division on the character of the costal space breaks down, 

 and Ps. meyricki, agreeing with the Asiatic species in this 

 respect, must nevei'theless stand apart from them in the tribal 

 division. But if it is the character of the costal cross-veins that 

 is the essential matter, the case becomes even worse; for then 

 the Australian species Ps. meyricki must at once be removed 

 from the tribe Psychopsini to the tribe Balmesini (all the rest of 

 which are Asiatic species), and must also be removed from the 

 genus J/agallanes, of which its close ally, Ps. insoJens McL., is 

 the genotype, and find its proper place in the Asiatic genus 

 Bahnes ! 



There is only one escape from this dilemma, and that is, to 

 admit that the tribal characters here under discussion are of no 

 value, and to suppress the tribe Balmesini altogether. 



Turning next to the characters of the tribe Zygophlehini Navas, 

 as here defined, it is only necessary to draw attention to my 

 remarks on the condition of the venation of Psychopsis elegans 

 in the region of M and Cu (p. 756). Navas' definition for the 

 tribe Zygophlehini indicates the presence of an anastomosis in 

 the region of these two veins for this tribe, but the absence of 

 the same anastomosis in the tribe Psychojysini. One would have 

 Mttle hesitation in deciding that both Psychopsis mimica New- 

 man, and Ps. elega7is Guerin, must go into the tribe Zygoj^hlehini, 

 on this definition. Whether the form of anastomosis is the same 

 in these species as it is in the African ones, I am not able to 

 say; the point is, that the amount of anastomosis in this region 

 is very variable, not only for diff'erent species, but also for dif- 

 ferent individuals of the same species. There is only one species 

 known to me, viz., Ps. insolens McL., in which it can truly be 

 said that the great majority of the known individuals have no 

 anastomosis in this region; hence, strictly speaking, this is the 

 only species that can be rightly admitted into the tribe 



