66o FAUNA HAWAIIENSIS 



(6) Proterhinus subangu/aris, sp. nov. 



To this form, for which I propose the specific name subangtilaris, belong nearly all 

 the series of examples referred by me to P. angularis in F. H. ii., 243. It is of narrow 

 form, often extremely narrow, and is not so depressed as angularis and stibplanatus. 

 The elytra are conspicuously clothed with long white and dark erect setae. The 

 antennae normally are long and slender and conspicuously setose. There is much 

 variation in the shape of the thorax and the humeral angles differ in form in different 

 examples. I suspect it will prove to be divisible into several distinct species or sub- 

 species. It is a narrower insect than P. obscuricolor and the dark setae on the elytra 

 are more developed. I have chosen a Molokai specimen as the tyjDe. 



Hab. Oahu, Molokai, Maui, Lanai, Hawaii. 



Proterliimis obscuricolor Perk. 



P. obscuricolor Perk., huj. op. 11., p. 202. 



This form is no doubt exceedingly close to those which I assigned to P. angularis 

 in my earlier collections. The limits of the species are at present uncertain and I 

 assign to it diminutive examples, which certainly approach P. subplanatus, but I am not 

 at all certain that careful study in the field will not show that these are distinct from 

 either. From notes attached to some of these small examples I find that they were 

 collected in the bark of twigs of Pelca, whereas P. obscuricolor, P. angulaiHs, P. sub- 

 angularis and P. subplanatus are certainly all attached to Slraussia. In examples taken 

 from Pclca the base of the elytra is usually dull red. The variation in the length of the 

 antennae is very great. 



Hab. Oahu ; mountains near Honolulu. 



Proterhinus subplanatus Perk. 



P. subplanatus Perk., huj. op. 11., p. 205. 



Another very variable species of the angularis group, generally easily recognized 

 by its depressed form, much less setose than true angularis and the entirely black or at 

 least very dark antennae. It is very variable in the structure of the antennae, the joints 

 having a strong tendency to become shortened. 



Hab. Oahu ; Koolau range, common beneath bark of Slraussia. 



Proterhinus longulus Sharp. 



P. longulus Sharp, huj. op. 11., p. 208. 



Varies greatly in size, and in some examples the elytra are largely black. 1 have 

 examined many examples, the species being very common on tree-ferns in the mountains 

 throughout Oahu. 



Hab. Oahu generally, from 1200 ft. upwards. 



