( lix ) 



" The wings of the latter are not so blue in some species, 

 but the colour is much deeper when they are folded. 



" Molokai, Lanai, and Maui are rich in these red-marked 

 forms with dark wings. 



"Colour-group E [= I of all the islands except Kauai].— 

 This, the most dominant Colour-group, is black, wings infuscate, 

 with blue, purple or steely reflections. To see the iridescence 

 at its best tlte insects should not be looked at in the box over 

 while 2Xiper, but held in the hand and viewed from above and 

 in front. The colour of the wings is always conspicuous in 

 life in this group, i. e. when the insect is flying, but in some it 

 isjess apparent after death. 



"For this group I have selected : — 



" DiPLOPTERA (Eumemxlae). 



Odynerus montanus, Sm. ..... Oahu. 



,, ni(jripennis, Holmgr. .... Oahu. 



Nesodynerus rudolpJti, iJalla Torre . . . Oahu. 



Odynerus molokaiensis, Perkins* . . . Molokai. 



Pseudojjterocheilus covgntus, Sm. . . . Molokai. 



Odynerus peles, Perkins ..... Hawaii. 



,, heterochroDius, Perkins . . . Hawaii. 



" FossORES {Crabronidae). 



Ilylocrabro tumidoventris, Perkins 



var. leucognathus, Perkins 

 Xenocrabi'o atripeimis, Perkins . 

 Nesocrabro rubrocaudalus, Blackb. and Cam. 



■ - Hawaii. 



Hawaii. 

 Hawaii, 



"Anthophila {Frosopidae). 



Nesoprosojns fuscip>ennis, Perkins . . . Oahu. 



,, caeruleipe7inis, Perkins . . . Molokai. 



,, pubescens, Perkins, typical . . Hawaii. 



„ setosifrons, Perkins . . . Hawaii. 



* This species is placed by Dr. Perkins in Group II of Molokai, Lanai 

 and Maui (= IV of Oahu), but it certainly seems to fit extremely well 

 into Group E, sent for exhibition (Group E = I of Molokai, Oahu, etc.). 

 The particular specimen of 0. molokaiensis exhibited was captureil in Maui 

 (Wailuku, Sept. 1901), the species having reached that island, Dr. Perkins 

 considers, about 1896.— E. B. P. 



