504 FAUNA HAUAIIENSIS 



disc ; the punctuation is scanty. The punctures in the male are often rather closer 

 near the anterior margin of the thorax, as in N. perkinsi, to which this species is in 

 some respects allied. The seriate punctuation on the elytra is scanty and very fine. A 

 few specimens are much lighter in colour, exhibiting lighter areas on the elytra, and 

 being in general of a brown rather than a black colour. The length varies from 

 2| to 3^ mm. 



The male pygidium is truncate with widely rounded angles, and with or without a 

 very slight median emargination; last ventral segment truncate; supplementary segment 

 usually slightly emarginate. Female pygidium not strongly tapering, rounded at the 

 apex. 



Hab. Hawaii — the original type from Mauna Loa, over 4000 ft. (Blackburn) : the 

 others from Kilauea ; above Hilo, 1800 ft. ; Haumana, Hilo, 2000 ft. ; Olaa, nos. 558, 

 568, 697, &c. ; (Perkins). 



For the Lanai and Maui forms, see below. 



Nesopetinus blackbnrni {}) var. lanaiensis, Blackburn. 



Brackypeplits [})\'diX-. lanaicnsis Blackburn, Tr. Dublin Soc. in. 1885, pp. 138 and 

 229. 



I have examined three specimens in the British Museum, obtained from Lanai by 

 Blackburn, and called " (?) var. lanaicnsis" by him. They are all very small, but there 

 is variation in size among the Hawaii specimens, and it is uncertain whether those from 

 Lanai can be separated as a definite variety. 



Nesopetinus blackburni, var. niaiiiensis, var. nov. 

 Mr Perkins obtained one male specimen from Maui. It is very small, narrow, 

 with conspicuously quadrangular thorax, and with the punctures on the elytra smaller 

 than in the Hawaii specimens, and their seriate arrangement less evident. 



Hab. Maui, Haleakala, 5000 ft. (no. 358, Perkins). H. S. 



Group 4. 



(25) Nesopctimts blackburnianus, sp. nov. 



Fusco-testaceus, nitidus, aegre aeneo-micans, subtile pubescens, prothorace trans- 

 verso, lateribus explanatis ac rotundatis, angulis posterioribus obtusis sed argutis, disco 

 crebre vix dense punctato ; elytris obscure seriatim punctatis ; abdomine haud dense 

 punctato. Long. corp. 4f mm. ; lat. corp. \\ mm. 



This species is clearly distinguished by the character of the terminal segments. 

 The male pygidium has a conspicuous notch, with a well-marked tooth on either side ; 

 the supjjlementary segment is broad and emarginate ; the last ventral segment is very 

 remarkable, being deeply and broadly emarginate, with the margin slightly sinuate in 



