COLEOPTERA 24: 



(116) Proterhinus angularis Sharp. 



Proterhinus angularis Sharp, Tr. Ent. Soc. London, 188 r, p. 530. 



An extremely variable species, no examples of the very long series examined 

 agreeing altogether with the original types. In the most common form the antennae 

 are long and slender, and clothed with stiff and conspicuous setae. Thorax very 

 variable in shape, generally rather narrow, rarely constricted in front as in the type. 

 The anterior depression is usually deep and distinct, the two posterior ones often 

 obsolete. The posterior angles are not distinctly marked by spots of dense squamosity. 

 Elytra long and narrow, shoulders always produced, but not very sharp, marked with a 

 patch of pale squamosity, and behind there are often a number of more or less distinct 

 and roundish pale squamous spots. 



Small examples are often of extremely narrow and elongate form. The dark 

 colour, form of the humeral angles of the elytra, and patches of pale squamosity thereon, 

 and the strongly and closely punctured basal ventral segment of the abdomen are the 

 most constant characters. The type specimens are remarkable for the more obscure 

 colour of the very conspicuous erect setae on the elytra, and I have only seen a few- 

 examples resembling them in this respect. Usually the longer setae are quite white, 

 and I am by no means satisfied as to the identity of the two forms, which may be 

 closely allied and variable but distinct species. The length varies from 2 — 2>'5 ^n^n- 



Hab. Oahu, Molokai, Maui, Lanai, Hawaii. Generally attached to Straussia. 

 Variable in each locality. 



(117) Protcrhiims dispar Sharp. 



Proterhinus dispar Sharp, Tr. Ent. Soc. London, 1881, p. 52S; Tr. Dublin Soc. 

 III. 1885, PI. V. fig. 41, ?. 



I have seen but few Oahuan examples of this species, but have taken it very freely 

 on Molokai, and have also met with it on Lanai. It varies very greatly in size and 

 otherwise, and the distinctive characters become much obscured in diminutive .specimens. 

 Some examples from Oahu have the head and thorax as well as part of the elytra of a 

 distinct red colour, and the antennae vary from black to red. The great differences in 

 size are not a sexual character, for of the Oahuan examples taken by me one of the 

 females is twice as large as either of the males, and e.xactly the reverse is the case with 

 the types in Dr Sharp's collection. The species is an interesting one on account of the 

 F. H. II. 32 



