cxl FAUNA HAWAIIENSIS 



beetle on the table and when I returned after a short absence, it had been carried off by 

 that household pest, the ant Pheidole megacephala, and I was unable to trace it or to 

 find another specimen. 



Atrachycneniis is only known from Maui and Molokai, and has the habits of the 

 Deropristns of those islands ; in fact they are sometimes found in company, but 

 individuals are not numerous. Anchotejflus is only known from Kauai and Oahu, 

 a species on each island, and neither seems to be common. A. gracilis was found on 

 the rocks in a mountain stream after a heavy spate, and probably lives beneath stones 

 on the margins of these streams. Pseudobroscus lentus is only known from near the 

 summit of Haleakala, Maui, where it was found under stones, a few weeks after the 

 disappearance of the snow-cap. 



The metallic and rather elegant, punctured, narrow species (four in number) of the 

 genera Derobroscus and Brosconynnus are only known from Oahu, where they are found 

 in holes in the trunks or branches of trees, or beneath close fitting bark. In very wet 

 forests we have once or twice found specimens on dark rainy nights, no doubt lying in 

 wait for their prey, outside their burrows. I suspect that they may be common in the 

 cavities in the higher branches and twigs of Koa trees, as the bird Paroreomyza 

 macjilata often contains fragments of many examples of these beetles, when it is shot 

 while feeding amongst these branches. DerobrosciLS politus was wrongly recorded from 

 'leaves' of trees, I should have written 'twigs.' 



Anchonymus agonoides was found very locally on Haleakala, inhabiting cavities in 

 the trunk or branches of the Koa. When found, a considerable number of individuals 

 is liable to occur, whereas of Derobroscus we never found more than two or three 

 together. The larvae of both these genera were noticed in company with the adults. 

 Mauna frigida is one of the most abundant species on Haleakala, Maui, and is found 

 beneath stones in the open country above the forest from 5000 — 10,000 ft. 



There are twelve described species of Disenochus, none, at present, being known 

 from Hawaii or Oahu, but on the latter, doubtless, the genus is to be found. They 

 occur beneath bark of trees, or rarely under logs lying on the ground, and several 

 are only found in very wet moss, growing upon tree trunks. A good many of the 

 species are rare or at least difficult to collect. D. cit-rtipes in general form greatly 

 resembles Atrachycjieinis, to which genus I supposed it to belong. It also has the same 

 habits. As a rule the species of Disenochus are remarkably constant in their exact 

 habitats, the variable D. aierritmis, however, exhibits some inconstancy in its choice of 

 these. Chalcomemcs with three species occurs on most of the islands ; the form on 

 Hawaii seems to be practically the same as the Molokai species. It is remarkable for 

 the fact that it roams about in the daytime, though usually this is only noticed in deep 

 dark gulches. In more exposed and open situations many examples may be found 

 hidden beneath stones or elsewhere, but none seen at large till after nightfall. The 

 large beetles of the genus Barypristus are confined to the open country of the high 



