COLEOPTERA 



255 



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(26) JMecyclothorax aeiiens, sp. nov. 



.. aeneus, antennarum basi, palpis pedibusque rufis, femorum basi 

 ...gia; prothorace lateribus sinuatis, angulis posterioribus rectis ; elytris regulariter, sat 

 profunda octostriatis, striis fere impunctatis. Long. 5^ — 6^ mm. 



Antennae rather long and slender. Thorax large, not strongly transverse, the 

 sides slightly round in front and sinuate behind, the hind angles very sharply marked, 

 rectangular, the base punctate, rather deeply impressed on each side ; the median 

 channel very distinct, the anterior impression quite obsolete. The striation of the elytra 

 very regular, complete, but not deep, the four foveoles very small. 



We have only two specimens of this species, which is not closely allied to any 

 other. The posterior one of the thoracic setae is not present in these specimens — 

 which are rather worn — but the spots of their insertion — on the margin at the hind 

 angle — are very distinct. 



Hab. Maui. Haleakala, 4500 — 6000 ft., March 1S94 (Perkins). 



(27) Mecyclotliorax cognatjts, sp. nov. 



Niger, supra aeneus, antennarum basi, palpis pedibusque testaceis, tibiis fusces- 

 centibus ; prothorace fortiter transverso, lateribus rotundatis, posterius fortiter angustatis, 

 angulis posterioribus rectis ; elytris regulariter, sat profunde striatis, striis fere impunc- 

 tatis. Long. 5^ mm. 



Very closely allied to M. aeneus, but with shorter thorax, and a more distinct basal 

 constriction of this part ; the elytra more oval, less oblong in form, rather more deeply 

 striated. I think a distinct species, though I have seen only one specimen. 



H.\B. Maui. Haleakala, 5000 ft., April 1894 (Perkins). 



(28) Alecyclothorax robnstiis, sp. nov. 



V Convexus, nitidus, piceus, (abdomine dilutiore interdum fla\'escente), supra nigro- 



1 piceus, elytris aeneomicantibus, marginibus pallidis, antennarum basi, palpis pedibusque 



flavis ; thorace lateribus rotundatis, angulis posterioribus breviter rectis ; elytris profunde 

 striatis, striis evidentius punctatis. Long. 6 mm. 



One of the largest Mecyclothorax, with the shoulders of the elytra less square than 

 in J\'f. platysminus ; the after-body convex and hea\)', the head narrow in comparison 

 with it. The thorax is very shining, the median channel very distinct, the anterior 

 impression definite, obsoletely strigose, the base punctate, the hind angles very definite, 

 rectangular. The striae of the elytra are all deep, definite and distinct from base to 

 apex, and their punctuation is more distinct than it is in most of the similar forms ; the 

 suture behind, and the margins, especially at the tip, reddish. 



F. H. III. II 



