( 41 ) 



"Colour-group A [= II of Kauai in Dr. Perkins's memoir.] 

 — Black, wings dark, blue reflections, two white or yellow 

 bands, second always broad. The examples selected are : — 



Odynerus kirbyi, Dalla Torre .... Kauai. 

 Nesodynerus vittativentris, Perkins . . . Kauai. 



" All the Kauai species, whether open country or forest insects, 

 belong to this group, excepting one or two apparently recent 

 arrivals from other Hawaiian islands, which are only slightly 

 different in structure and appearance from Odynerus sand- 

 wichensis, de Sauss., of Group D. 



"Group A is not exactly represented on the other islands, 

 but a sub-group of pale-banded species on Oahu approaches 

 it, and it is curious that the insects so coloured on all the 

 islands except Kauai belong to the lowlands (open), or to the 

 open country above the forest line, or to open spaces in forest 

 regions, 

 lviii] 



" Kauai is remarkable for its distinctively marked species, 

 practically all belonging to the one Colour-group. 



" Colour-group B [= II of Oahu]. — Black, peculiar shining 

 fuscous wings, almost brassy, distinctive appeai - ance in life, 

 not blue. Examples : — 



Odynerus dtiliiosus, Sm. ..... Oahu. 



Nesodynerus oblitus, Perkins .... Oahu. 



Nesoprosojns jmbescens, Perkins, var., with blue 



iridescence. Rare ..... Hawaii. 



" Peculiar, as an extensive group, to Oahu. It is to be 

 noted that N. jiubescens is a unique case of dichromatism of 

 the wings.* 



" Colour-group C [= III of Oahu]. — Sombre red markings, 

 much appressed tomentum on body, tvings nearly clear hyaline. 

 Appearance very distinctive in life, having a peculiar fuscous 

 look. Example: — 



Odynerus oahuensis, Dalla Tone .... Oahu. 



* Judging only from this limited number of examples it appears that 

 the typical N. pubescens more closely resembles the Odyneri of Group B, 

 and the blue-iridescent var., those of E. Furthermore the example of 

 N.fuscipennis, from Oahu, in Group E, might be more suitably placed in B. 

 Both this specimen and pubesce?is (typical) are rather clearly distinguish- 

 able by the " brassy " appearance of their wings from the other members 

 of E.— E. B. P. 



