244 [November, 1877 



one tarsus as compared with another) more equally bilobed ; "while the 

 rest all frequent moss, damp ground, &c., and in those of which the 

 tarsi approach the Dyscolus form, the tendency is much less evident in 

 the hind than in the other tarsi. I have, however, mentioned the 

 characters of the tarsi in each description. Still, it does not appear to 

 me that all the species (notably the last Anchomenus and first Dyscolus) 

 fall quite naturally into any genus that I know of. 



I have characterised the form of the tarsi according to their ap- 

 pearance when examined from beneath. The appearance of the 4th 

 joint, viewed from above, is frequently deceptive, as the apical joint is 

 often inserted near the base of the 4th joint, and received in a kind of 

 furrow running down the latter, but not really dividing it. 



In nearly all the Anchomenidce I have met with in the Sandwich 

 Islands, the 4th joint of the tarsi is very distinctly wider and more 

 emarginate than in the British species of Ancliomenus, and I can dis- 

 cover scarcely any trace of the sexual distinction usual in the anterior 

 tarsi. 



It should perhaps be stated, that in the following descriptions, 

 when the autcnna>, as compai'ed (in respect of length) with half the 

 body, are called " miilto Ion(/io7'es,'" their length cqvials about two-thirds 

 of the body. 



All the following species, moreover, have the two or three slight 

 impressions usual on tbe third interstice of the elytra, but (except in 

 one instance) not in a remarkable degree. 



ANCROMUNUS. 



A. MuscicoLA, sp. nov. 



Piceus ; palpis, pedibus, prothoracis elytrorumque marginihus, teslaceis ; an- 

 tennis piceo-teslaceis, basi dilidiorihus ; capiie elongate ; oculis magnis, convexius- 

 cuiis ; antennis corporis dlmidio multo longioribus ; prothorace subcordato, leviter 

 transversa, postice quam antice hand angustiori, canaliculato, antice fortiter emargi- 

 nate, margine basin versus fortiter repando, angulis posticis fere rectis, lateribus 

 fortius rotundatis ; elgtris ovalibtis, convexiusculis, fortiter striatis, interstitiis con- 

 vexiiisculis, humei'is fortius productis ; iarsorum {nee postremorunij articnlo quarto 

 fortius emarginato. Long. 9 — 10 mm. 



Common (at one spot only) on the Oahu Mountains. 



N.B. — Dr. Sharp informs me that this insect is near A. KichoUsi, 

 "Woll. It is certainly, I think, allied to A. alhipes, T. ; compared, 

 however, with that insect, the antennae are distinctly longer ; the head 

 longer ; eyes a little less convex ; thorax much wider behind, with 

 margins broadly spread out behind, base ucpunctured, hinder angles 



