2 12 FAUNA HAWAIIENSIS 



This cannot be confounded with any other form, as it possesses the pecuHar 

 coloration of the elytra found in the genus Mysticomemis, and in addition to this has 

 the fourth tarsal joint bilobed as in Metroniewiis pahnae ; to these peculiarities it adds 

 another, namely, the angular elevation of the interstices found in some other species of 

 Kauai Carabidae. The antennae and legs are pale yellow. The thorax is short, trans- 

 verse, narrowed behind, with the hind angles completely rounded. The elytra are 

 nearly rounded at the tips, only slightly sinuate ; they have a somewhat irregular surface, 

 and the middle of each interstice is slightly raised so as to give rise to a faint appearance 

 of angularity in a transverse section. The maculation is very irregular, indeed it is not 

 alike in the two wing-cases of an individual. The tarsi are short and grooves on them 

 entirely absent. 



We have received a series of about 60 specimens of this species. It does not vary 

 much except in the markings of the elytra, and that the disc of the thorax is fuscescent 

 in a variable degree. 



Hab. Kauai : 4000 ft. on several occasions (Perkins). 



MvsTicoMENUS, gen. nov. 



Corpus subdepressum, thorax marginatus, setis erectis carens. Alae perfecte 

 explicatae. Elytra ad basin argute marginata, ad apicem leviter sinuata. Tarsi articulo 

 quarto bilobato, subtus densissime piloso. Palpi labiales breves. 



The two species of this genus are very remarkable on account of the coloration of 

 their elytra ; this consists of a very irregular mixture of yellow and dark marks, the marks 

 not being the same on any two specimens or on the two elytra of the same individual. 

 In M. tibialis the yellow colour is more extensive than the dark colour, in M. viysticns 

 the reverse is the case. 



Mysticonicnns is a very isolated genus. It resembles Metroinemis in general 

 appearance, but the tarsi have no trace of grooves, and the large lobes of their fourth 

 joint are densely clothed with fine hair beneath, as in Colpodiscus. 



Those who may think that the Hawaiian Anchomenides have probably been derived 

 from a single form introduced into the islands long ago might find this original ancestor 

 in some form like Mysticomemis. 



(i) Mysticomemis tibialis, sp. nov. 



Subdepressus, haud nitidus, flavescens, elytris irregulariter fusco-signatis, subobsolete 

 striatis. Long. 6^ mm. 



Mas, tibiis intermediis et posterioribus sinuatis. 



Head broad, eyes prominent, placed near the thorax. Thorax broader than long, 

 slightly narrowed behind, not much rounded at the sides, rather fiat, impunctate. Elytra 

 broad, very slightly striate. Legs pale yellow. 



