314 



Memoirs of the Indian Museum. 



[Vol. Ill, 



Text-figure 7. 



Diagram illustrating tbe evolution of the different types of asymmetry found in the Aceraiinae and 

 Gnaphalocncminae,. as far as this can be done by reference to known genera, all of which are recent : and 

 illustrating the geographical distribution of these genera. The only known exceptions to the distribution 

 as shown here are: — (i) a species of lipiaphcnoides which lives in New (Guinea instead of Australia; (2) 

 one or two species of Gonatas which occur in the Sunda Islands; (3) a species of Gnaphalociicmis 

 which has been recorded from Amboina; and (4) the genus Plcsthcnus, whose anomalous distribution (in 

 Australia and Celebes) calls for further study. The genus Kaupioloidcs is in some ways intermediate 

 between the Australian genera and Cdejus-Anahichcs from New Guinea, in which position it is placed 

 here. The head is, however, less perfectly symmetrical than in some species of the latter pair of genera ; 

 and its metasternum suggests the possibility of a closer relationship with Protomococlns than is here indi- 

 cated. The ])articular structures whose various modifications the diagram is designed to illustrate are 

 shown by thickened lines. The figure of P/£'s//)t;«)/s is from Kaup; those of P(;/o/)!V/<'s and Tati'iis are 

 from Kuwert; that of Atircliiis is partly from Kuwert, partly from memory; and that of the sym- 

 metrical species of Cet ejus-. Anal aches entirely from memory. 



