COLEOPTERA 



■■i>i> 



of this species. It is in fact, notwithstanding its name, much less variable than its 

 immediate allies. The tarsal structure differentiates it from all the other Metromemis 

 except ]M. palniae. 



Hab. Oahu. Rather plentiful on the leaves of a species of the lily tribe (locally 

 known as "silver sword"); also in stems of fern; at an elevation of 2000ft. and 

 upwards (Blackburn). Honolulu, in various spots and in several months, apparently 

 always between 2000 and 3000 ft. (Perkins). 



No. 1259, Prof. Thaxter for Laboulbeniaceae. 



(3) ]Mct7'omc7ius caliginosus, Blackburn. 



Dyscolus caliginosus Blackburn 1. c. 



This species differs from M. ntutabilis by the narrower form, rather more deeply 

 striate elytra, and by the less deeply divided fourth joint of the hind feet. It is extremely 

 variable in colour, some examples being concolorous testaceous or yellowish, while in 

 others the head, the disc of the thorax and the elytra are blackish. The dark colour of 

 the elytra is not formed (as it is in the dark varieties of AI. mntabilis) by an extension 

 of dark colour from behind forwards, but by a general suffusion of the surface. I have 

 examined about sixty specimens. 



Hab. Oahu. Found occasionally in the stems of ferns and other plants at an 

 elevation of about 2000 ft. (Blackburn). Honolulu, in various places in the mountains 

 (Perkins). 



No. 1 26 1, Prof Thaxter for Laboulbeniaceae. 



(4) H/ctroiitcnus aeqnalis, sp. nov. 



Flavescens, plus minusve nigro-infuscatus, antennis pedibusque laete flavis ; elytris 

 subtiliter striatis ; tarsorum posticorum articulo quarto emarginato haud bilobato. 

 Long. 7 mm. 



Plate VI. fig. 14, hind foot above and below. 



Very closely allied to M. caliginosus, but can be distinguished by the tarsal structure 

 as well as by the less deeply striate elytra, the broader form, and the rather broader base 

 of the thorax. It is always broader. Although the species varies in colour in the same 

 manner as M. caliginosus does, yet I do not entertain any doubt as to the distinctness of 

 the two forms, though at first I did so. 



The head is black or blackish. The thorax is reddish-yellow, with the disc more 

 or less broadly and deeply infuscate. The elytra are obscure yellow, more or less deeply 

 tinged with black ; in some examples quite black, with the suture and epipleural margin 

 reddish. The thorax is 1^ mm. broad and scarcely shorter than this; it is distinctly 



;q— 2 



