48 



very minute Oligota, one or two Myllaena all rare, and an occa- 

 sional Diestota are all I have noted. Glyptoma blackburni and 

 the much rarer Lispinodes I have already mentioned under 

 Colydiidae. The Staphylinidae of Oahu require a very special 

 study extending over several years to get together a fairly good 

 collection. 



The Carabidae are well represented by one or two extremely 

 common and some very scarce species. Chalcomenus corruscus 

 may be found running in the day time on bare ground or at the 

 bottom of gulches. It is interesting as being the first known 

 Hawaiian Carabid. It was described in 1834 or half a century 

 before any other species. Colpocaccus tantalus is very common 

 in many situations and fifty or a hundred individuals are some- 

 times found in a single batch. Mesothriscus muscicola is not rare 

 and M. prognathus probably came from the same locality. 

 Metromenus has the following species; palmae common on 

 Freycinctia ; mutabilis in stems of tree ferns ; epicurus abundant 

 and very variable in colour and structure; fraternus rare, fossi- 

 pennis local, fugitivus not rare; protervus very rare; cuneipennis 

 rather common. 



M. cuneipennis and fugitivus are true ground species, while 

 the others named are found in various situations. There are 

 also three or four other species, which have not been accurately 

 determined at present. Thriscothorax brevis is not rare and is 

 always found on the ground, and Metrothorax simiolus is some- 

 times with it, but more often found in cavities of tree ferns or 

 rotting wood. Bembidium teres runs on the ground in gulches 

 or damp places, as also does B. pacificum. Though abundant 

 elsewhere in the islands, neither is common on Tantalus. Prob- 

 ably many other Oahuan Carabidae remain to be found in this 

 locality and the unique Deropristus blaptoides, the finest of all 

 Hawaiian Carabidae, should be looked for under stones, and the 

 green metallic species of Derobroscus and Brosconymus in cavities 

 in the higher branches of Koa trees. 



HEMIPTERA HOMOPTERA. 



Three or four species of Psyllidae are found, causing gall-like 

 growths on the leaves of Pelea and Metrosideros. Those with 

 pigmented wings are always rare or local species. There are 

 some four species of Jassidae, but the Fulgorids are better repre- 



