2o8 FAUNA HAWAIIENSIS 



Barvpristus Sharp. 



Barypvistus Sharp, Ent. Mo. Mag. xx. p. 217. 



We may now, after separation of B. s/iarpi, add to the characters of this genus ; 

 metasternum short ; wings vestigial, being small and not adapted for flight, though 

 always longer than the metanotum. 



This is the most important of the genera of this division of the Hawaiian 

 Anchomenids, in which the wings exist in such a state as to lead us to suppose that 

 they may formerly have been larger and functionally perfect. In most of the other 

 genera the wings are either reduced to small vestiges or are so large as to enable 

 flight to be executed. 



The three genera, Afauna, Diseuockus and Barypristiis, have very similar characters, 

 so that it is difficult to distinguish them by a definition. Barypristiis has however 

 a totally different shape and appearance from the other two ; the individuals are much 

 larger, and the vestigial wings are longer than the metanotum. There is no form 

 intermediate. 



(i) Barypvistus riipicola, Blackburn. 



Anchomemis rupicola Blackb., Ent. Mo. Mag. xv. p. 122. 



Plate VI. fig. 23, varieties of vestigial wings. 



Mr Perkins met with this species about half-way up the mountain in April and 

 May, and procured a good series about the crater of Haleakala in October. It never 

 occurs in the forest, but is found under stones outside. It varies a good deal in size, 

 and a little in the width of the thorax. I have seen about 200 specimens. 



Hab. Maui : Haleakala, 4 — 10,000 ft. (Blackburn, Perkins). 



(2) Barypristus incendiarius, Blkn. 



Anchomenus incendiarius Blackburn, Ent. Mo. Mag. xvi. p. 105. 



Plate VI. fig. 7, % individual: fig. 21, vestigial wing. 



This is the largest Hawaiian Carabid and appears to be very rare. It occurs under 

 the bark of Koa and oviposits in the chinks of the bark. 



Although closely allied to B. rupicola, the species is certainly distinct. It is rather 

 larger, has the elytra a little straighter at the sides and more acuminate at the tip, and 

 slightly more deeply striate. The front angles of the thorax are more broadly rounded. 

 The vestigial wings are 6 mm. long, whereas in B. rupicola they are usually less than 

 3 mm. and surpass that dimension only to a slight extent even in the largest examples. 



Hab. Hawaii (Blackburn, Perkins) : Mauna Loa, 4000 ft. (Blackburn) ; Kilauea in 

 August (Perkins). 



