92 



the flowers of the Ohia trees, to which they resort for food. Prac- 

 tically all the bees and wasps found here are burrowers in the 

 ground, or they nest in holes in the lava blocks, those which nest 

 in tree trunks, being absent or present only as stragglers. 



The second region or Koa forest is well characterized by its 

 Longicorn beetles of the genus Plagithmysus and Clytarlus, by its 

 abundance of Anobiidae, large black Fornax, the Cistelid Labetis, 

 and the many wasps of the genus Odynems, that frequent the 

 tree trunks. 



The third is rich in moths of the genus Leucania, in species of 

 Carabid beetles, which, however, excepting in a few cases, are 

 rare in individuals; in special species of Nitidiilidae, and in its 

 interesting and peculiar bees of the genus Nesoprosopis. It also 

 produces the large and remarkable weevil, Nesotocus munroi. 



I will now take the Orders of insects seriatim and list some of 

 the species that I have met with at Kilauea. As in my last year's 

 address I shall deal only with the endemic insects, omitting all 

 reference to introduced species. 



Thysanura. 

 Mackilis heteropus is common as in other wooded localities 

 throughout the islands, but no native Lepisma nor lapyx have 

 been found at Kilauea and probably they do not occur on the 

 island of Hawaii. The Collembola are ntimerous in individuals 

 at least, but probably all the species are introduced, excepting 

 possibly some of the Achoreutidae, which congregate beneath 

 the bark of trees. 



ORTHOPTERA. 



The ubiquitous roach Phyllodromia obtusata is of course abun- 

 dant, its egg capsules here, as elsewhere in the islands, being 

 destroyed by the Eupelmine Chalcid, Solindenia picticornis. 

 The Locustid Brachymetopa nitida only just attains so high an 

 elevation as Kilauea and is not common there, but abounds 

 lower down in the Olaa and Hilo forests, and it is interesting to 

 observ^e that examples from the different localities exhibit ap- 

 parently more or less definitely distinct variations, as if tending 

 to become distinct species. B. nitida has a not-green form of the 

 female, in Olaa every fourth or fifth specimen of this sex being 

 either fuscous, brownish or yellowish. The males on the other 

 hand are always, or nearly always, green. • In Olaa the unique 



