COLEOPTERA 211 



genus of this division of the Hawaiian Anchomenides that has two setae on each side 

 of the prothorax. It is also remarkable on account of the three or four large foveae 

 close to the lateral margin of the elytron. These foveae are somewhat irregular in 

 size and number. On the inner face of the elytra they appear as transparent spaces 

 surrounded, each one, by a black ring. 



( I ) Prodisenochns tcrebratus Blackb. 



Disenochus terebratus Blackb., Ent. Mo. Mag. xvii. p. 227. 



Promecoderus fossulatus Karsch, Berlin. Ent. Zeitschr. xxv. (1881), p. 4, pi. 1. tig. 5. 



This is one of the rarest of the Hawaiian Carabidae. It has very little of the 

 appearance of an Anchomenid, and it is scarcely a matter for surprise that Karsch 

 should have located it in another tribe. The species varies a good deal in the sculpture 

 of the elytra. It may be known by the peculiar fossae at the sides of the elytra, and 

 by the two thoracic setae. It is shining, intense black in colour of the body, the elytra 

 have the peculiar broken striation, characteristic of several forms of Hawaiian Carabidae, 

 they are not at all sinuate or truncate at the apex, the wing rudiments are small, but 

 extend to the hind margin of the metanotum. 



Hab. Maui (Blackburn, Finsch, Perkins): Haleakala, about 4000ft., in February 

 and April. 



Ai'TEROMESUS, gen. nov. 



Alae parvae sed hand omnino obsoletae : prothorax absque setis erectis ; tarsi 

 articulo quarto bilobato, subtus piloso. 



1 establish this genus for an extremely interesting form in which the wings are 

 present, and of considerable size though merely useless vestiges. In this respect it 

 resembles Barypristns, though totally different in appearance therefrom. It is nearest to 

 Mysticomeiuis, from which it is distinguished by the vestigial wings and by the shorter 

 metasternum. It has the peculiar coloration of MystiiOiucmts, but is very different in 

 sculpture, the striae of the elytra having nearly disappeared to give place to shallow 

 grooves, the interstices of which are slightly elevated along the middle. 



The vestigial wings (Plate VI. fig. 20) have not the same form as those of the 

 genus Barypristtis, being comparatively longer and narrower, nearly half as long as the 

 wing-cases, with a strong thick costa, and also a thick subcostal nervure, without any 

 chitinisation of the tip of the wing. 



This genus has to a considerable extent the appearance of a Mctronicnns, and was 

 at first supposed by me to belong to our second division of Anchomenides. 



(i) Apteronn'sns uiaat/ahis, sp. nov. 

 Testaceus, parum convexus, capite fuscescente, elytris irregulariter fusco-variegatis ; 

 his subsulcatis, interstitiis minus alte angulariter elevatis. Long. 5^ — 6^ mm. 

 Plate \T. ficr. 20, vestigial wingf. 



