( Iviii ) 



" 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 appearance in life, 

 not blue. Examples : — 



Odynerus duJdosris, Sm. ..... Oahu. 



N esodynerus obliius, Perkins .... Oahu. 



Nesojjrosopis pubescens, Perkins, var., with blue 



iridescence. Bare ..... 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 appi'essed tomeutum on body, whujs nearly clear hyaline. 

 Appearance very distinctive in life, having a peculiar fuscous 

 look. Example: — 



Odynerus oalmensis, Dalla Tori'e .... Oahu. 



" All tlie species are Odijuerus proper, but very diverse 

 in structure, the little Colour-group of six species, all peculiar 

 to Oahu, representing three very distinct structural groups. 

 There is nothing like them in colour on any other island, I 

 have taken all six at the same spot and time on one occasion, 

 and generally three or four are flying together. 



"Oahu is remarkable for the diversity of its Colour-groups, 

 all being represented, except that the pale-banded forms are 

 not quite like those of Kauai, and the sandtvichensis, Group 

 D, has become the distinct dicbiosua, Group B, above. 



" Colour-group D [ = III of Maui, etc.]. — Species very 

 numerous and diverse in structure but all are Odynerus. 



" Black, with red markings, wings dark, blue reflections. 

 I have sent two examples : — 



Odynerus petrobius, Perkins .... JMolokai. 



Odynerus saiidwichensis, de Sauss. . . . Maui. 



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

 the typical iV. pubescens more closely resembles the Odyncri of Group B, 

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

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

 Both this specimen and pubescens (typical) are rather clearly distinguish- 

 able by the " brassy " ai)pearance of their wings from the other members 

 of E.— E. B. P. 



