COLEOPTERA 225 



Antennae short. Thorax much narrowed behind, the hind angles very distinctly 

 obtuse, the side margin not strongly upturned. Female, with two abdominal setae on 

 each side. 



The small series of thirteen examples indicates that this is probably distinct from 

 M. vagaiis. The thorax is less contracted and sinuate behind, and the sides there less 

 upturned, so that the surface appears to be flatter. 



The variety with red thorax has a great resemblance to Atelotlu'uS Iiaivaiicusis. 



Hab. Hawaii. Kilauea, July 1896 (Perkins). 

 No. T238, Prof. Thaxter for Laboulbeniaceae. 



(7) Mesotkrisciis truncahis, sp. nov. 



Robustus, subdepressus, niger, nitidus, antennis palpis pedibusque testaceis ; thorace 

 transverso, basin versus angustato, angulis posterioribus rotundato-obtusis ; elytris regu- 

 lariter striatis, apicibus sinuatim subtruncatis. Long. corp. 8 mm. 



• This is not closely allied to any other species ; by the term it resembles more 

 Atelothrus dcprcssiis and allies and Metromcnits pavidits, rather than any other 

 Mesotlirisciis. The thorax is much narrowed behind ; the angles are very indistinct. 

 The elytra are broad, the angle formed by the junction of the lateral and basal 

 margins is very indistinct ; the striation is rather deep, very regular, and the broad 

 interstices are quite flat : the apex is more depressed and truncate than usual. The 

 fourth joint of the hind tarsus is not at all lobed. The female has three setae on each 

 side of the last ventral segment. Three specimens. 



The resemblance to Mctronioius pavidiis, in company with which this insect was 

 found, is so great that I shall not be surprised it it prove to be a sport thereof 



Hab. Kauai (Perkins). Waimea, 4000 ft. 



(8) Mesothriscits collaris, sp. nov. 



Major, elongatus, piceo-ferrugineus, nitidus, antennis palpis pedibusque flavis, 

 elytrorum limbo late ferrugineo ; prothorace elongate, angusto, angulis posterioribus 

 leniter obtusis ; elytris elongatis, profunde striatis, ad apicem perparum sinuatis. Long, 

 corp. 10 mm. 



This resembles At clot lints loiigicollis and A. limbatus : it has the thorax longer 

 than the second of this species ; while from A. longicollis it differs by the colour of the 

 elytra and the less sharp posterior angles of the thorax. It is even more similar to 

 certain specimens of Mcfrovicnus ductus, but it has the thorax less constricted and 

 narrow behind. Until more specimens are found it cannot be considered certain that 

 these two are distinct. It is, however, very unlikely that a Mesotkriscus can be a sport 



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