2 on 



Aloha flavocollaris the acdcnu'iis is llntti'iicd and deepened con- 

 siderably at base, as is also the case in the tour allied species 

 (Ji'oalensis, campylothecae. (lulxiuUac and (irlcniisiae). Neso- 

 sydne Ipouwelocola ap])ears to lead to halia and this to sliarpi, 

 giffardi and nionfis'-faiifaJiis. N. rocl'i is very isolated. N. 

 nepli rolrpidis. hhichhiniii and pcrlitisi mav indicate a plivlo- 

 g'cnetie ii'rou]^, and X. Inronnnoda may lead to njdlliodix. 

 Xesore.sfias may be a development of N^esosydiie l-irl-<ddyi. 

 Dirt yop]iorodelp]ia.v is extremely isolated, hnt a]>])ears to have 

 affinities to Nesorestias fiJicirola. 



In AJolin ipo)no('((e the genital styles are fairly simple. 

 The line of evolntion appears to be in the development of the 

 "ankle knob" which leads to a complexity of strnctnre; an- 

 other line of evolntion is the narrowing of the styles. 



It wonld be perfectly legitimate to call all these species 

 phallic species, for the chrootic characters are very slig'ht in 

 comparison with the phallic. 



Factoes IX EVOLUTIOX. 



Dentil Factors. Althonoh no case of e^o: parasitism has 

 been placed on record, yet the ])i'esence of ]\rymarids abont 

 bnshes containing Delphacids indicate that snch exist; jndging 

 Ijy conditions elsewhere T shonld say that they ])\ay an im- 

 portant part in redncing the nnmbers of the Delphacids. Spe- 

 cies of Pipnncnlidae, Dryinidae and Stylopids are common 

 and play a very important part in the balance of these insects. 

 Species of native predaceons Heteroptera are common in some 

 localities ; what part native birds and lizards play I cannot 

 jndge, as my experience in the field is too limited. At the 

 present time the introdnced ant (Pheidole megacephala) plays 

 a very important part in the districts in which it can thrive, 

 and it is likely it will lead to the extinction of certain spe- 

 cies." Jndging by the little we know of the death factors it 

 is highly probable that the chief mortality falls npon the eggs 

 and nymphs and can have little or no effect upon adnlt char- 

 acters, except by correlationship. 



Natural Selection. !N"one of the structnral chrootic specific 

 or generic characters show signs of direct ntility, and there- 

 fore cannot be acconnted for directly by Xatural Selection. 



*Note: — See remarks under Aloha plectrantM. 



