2So FAUNA HAU'AIIENSIS 



Molokai, two come from Maui, and two from Kauai. Apart from the full)' developed 

 wings these two Kauai examples appear to me to be indistinguishable from Nesocidium 

 laeticulum. 



Hab. Molokai. On several occasions in May and June, 1893, 1S94 and 1896, in 

 May and June, 4000 ft. (Perkins). — Maui, Haleakala 5000 ft., April 10. 1894 (Perkins, 

 one specimen. No. 369) : W. Maui, 1902 (Koebele, one specimen). — Kauai, Mountains, 

 Waimea, June 1894, one specimen, October 1895, one specimen (Perkins). 



NESociniuM, gen. nov. 



Alae vestigiales. Caput brevissimum. Prothorax utrinque setis duabus munitus. 



This genus consists of ten species that are flightless, but have the full complement 

 of thoracic setae. These forms are very varied and include some most aberrant Bem- 

 bidiids. The metallic species however are generically distinguishable from Bemhiditivi 

 molokaiense only by the wings being vestigial. In the case of all the species except 

 N. laeiictihwi this degradational character is pretty certainh- complete and in\ariable : 

 but in the case of A^. laeticulum I believe this character loses its value, and I cannot 

 refrain from suggesting that this species is dimorphic, and that the Kauai examples I have 

 placed under B. t/iolokaiensc are sports, or reversional forms of yV. laetictthtin. 



Section i. Corpus supra metallescens. Elytra quadri-impressa. 

 The anterior impressions are large in all the species except N. kocbelei. The 

 posterior impressions differ, according to the species, in distinctness. 



( I ) Nesocidium laeticiihmi, sp. nov. 



Nigrum, supra auratum, vel viridi-auratum, antennarum basi pedibusque rufo-testa- 

 ceis, antennis e.xtrorsum fuscescentibus ; prothorace fortiter transverso ; elytris versus 

 basin subplanatis, ibidemque late bi-impressis ; fortiter seriatim punctatis, dimidio apicali 

 impunctato, perpolito. Long. 2\ — 2f mm. 



Plate VII. figs. 20 & 24. 



This pretty little insect has the thorax strongly transverse, and with very little 

 sculpture in front of its obscure basal margin ; it is very strongly transverse, the sides 

 greatly rounded and much narrowed behind, and the hind angles are prevented from 

 being obtuse by a sinuation that occurs close to them. The elytra are rather short and 

 broad, with seven series of punctures on the basal part ; the sutural series is continued 

 as an impressed stria to the tip of the wing, the other series gradually become shorter, 

 so that the outer one consists of not more than six or eight punctures just behind 

 and outside the shoulder : the anterior impression on each is large and more or less 

 affects three of the series of punctures and interstices : the posterior impression easily 

 escapes notice, being merely a puncture placed on the third interstice. About fifty 

 specimens. 



