45 



on the mountains a mile or two behind Tantalus, the climate 

 becomes more agreeable to the Hawaiian beetles on this moun- 

 tain, for it is noteworthy that in most localities with excessive 

 precipitation the Coleopterous fauna is scanty. 



The native Longicorns are not very numerous consisting of 

 our single species of Parandra, Aegosoma refJexum, the small 

 Clytarlus fragilis of the Koa, and several Plagithmysus . P. 

 solitarius is on Eugenia sandwichensis and is not rare. More 

 rarely it breeds in Metrosiderus. On one occasion I took eighty 

 larvae in a small piece of wood of the "Ohia-ha," but all save 

 two were destroyed by Braconid parasites, and the elevation 

 being only about 1200 feet ants also were attacking the beetles. 

 P. pulverulentus and cristatus are common on unhealthy Koa 

 trees and as these unhealthy trees, owing to the settlement on 

 the mountain, are now abundant, the beetles must be extremely 

 so. Callithmysus koebelei in shady places on Pipturus, and C. 

 microgaster on Bohea are always worth looking for. I have taken 

 microgaster in May, June and November, koebelei chiefly in the 

 latter month. The larvae of microgaster I have taken in numbers, 

 but the beetles rarely and singly. Of the weevils the fine Otior- 

 hynchine, Rhyncogonus blackburni is found sparsely on all sorts 

 of trees, but its life history is altogether unknown. The hitherto 

 unique R. koebelei was found near by, and should be rediscovered. 

 The Cryptorhynchines are represented by Acalles duplex and at 

 least three or four other species, all but the one named being 

 most difficult to collect. I have cut some of them out of very 

 hard and dry dead twigs and branches of different forest trees. 

 Dryophthorus is well represented by squalidus, distinguendus , 

 gravidus, crassus, declivis, modestus, oahuensis, insignis and 

 insignoides; pusillus, the distinctness of which from modestus 

 seems to me doubtful, might be rediscovered in tree-ferns, where 

 it was found by Blackburn. The Dryophthorus are gregarious and 

 it is quite usual to find from two to half a dozen species in a 

 single flock. Pentarthrum prolixum is abundant on tree-ferns, and 

 obscurum and blackburni are both to be found, the latter at very 

 low elevations or even on the plains. Orothreptes callithrix, orig- 

 inally described from Kona, Hawaii, is not rare at 1500 feet and 

 Deinocossonus is taken singly and infrequently. Pseudolus (two 

 species) and Phloeophagosoma are in decaying Kukui, Cactus 

 and other soft woods, while an undescribed Nesotocus is very rare . 



