xciv FAUNA HAWAIIENSIS 



On Kauai are two colour groups, one of which contains only two known species. 



Group I. 

 Insects with much red marking, wings shining fuscous, when spread. 

 O. blackburni and soror, allied species. 



Group II. 

 Black insects with two conspicuous whitish or yellow bands on abdomen ; wings 

 dark and with conspicuous blue or purple reflections. Fourteen species of diverse 

 structure. (Plate XVI, fig. i.) 



On Oahu are four colour groups, two of which may be said to be peculiar to 

 this island. 



Group I. 

 Black insects with dark wings, showing conspicuous blue or purple reflections. 

 O. nigripennis, epipsetistes, erro, lopteryx, montanus, konanus, unicus. Nesodynerus 

 optabilis, rudolphi.' (Plate XVI, fig. 3.) 



Group II. 



Generally small species, black with shining fuscous wings, no blue reflections. In 

 this group some species show feeble and variable pale abdominal bands, and others 

 some red markings, apparently tending to disappearance and not conspicuous. 



O. dubiosus, threnodes, pterophaennes, tvaianaeanus, palndicola, paraiiaias. Neso- 

 dynerus oblilus, acyanus. (Plate XVI, fig. 4.) 



Group III. 



Insects usually much marked with red, and the body with appressed fuscous 

 tomentum. Wings to a large extent hyaline and with no blue reflections. 



O. pseudochi-omus, pseudochromoides, leiodemas, homoeophanes, eucharis, oahuensis. 

 (Plate XVI, fig. 2.) 



Group IV. 

 Insects with usually two pale abdominal bands, the wings more or less infuscate 

 and with blue reflections, body generally with pale tomentum. 



O. xerophilus, nautarum, acoelogaster. Pseudopte^'o-cheihis relictus. 



On Maui, Molokai, and Lanai, the fauna of each of which is largely the same, 

 we have three groups. 



Group I. 

 Identical with I on Oahu. 



O. nigripennis, purpurifer, instabilis, ecostatus, laaisukatus, camelinus, brevi- 

 costattis, aprepes, lanaiensis, konanus. Nesodynerus eupie7yx, paradias. Pseudoptero- 

 cheilus congruus. Chelodynerus chelifer. 



