238 FAUNA HAWAIIENSIS 



(14) Metroniemis pavidus sp. nov. 



Robustus, parum convexus, nitldus, niger, antennis palpis pedibusque flavis ; pro- 

 thorace transverse, basin versus angustato, angulis posterioribus obtusis, subrotundatis ; 

 elytris apice sinuatim subtruncato profunde striatis, interstitiis levissime convexis. 

 Long. 7 — 8^ mm., lat. 3 — 3|- mm. 



Plate VI. fig. 13, hind foot. 



This very distinct Metromeniis is not closely allied to any other. The short prothorax 

 (the breadth of which to the length is as about 6 to 5), the sinuate-truncate apices of the 

 elytra and the shining black colour give it a slight resemblance to some of the shining 

 species of Discnocluis. The tarsi are however distinctly grooved, and there is no real 

 affinity with Disenochiis. The legs, antennae and palpi are bright yellow, the epipleuron 

 is quite black. The fourth joint of the hind tarsus is small, not bilobed. The female 

 has three setae on each side of the middle of the last ventral segment, and the elytra are 

 more prolonged at the apices. A large series of about 240 examples has been obtained. 

 The series does not exhibit much variation. 



Mesothj'isciis truncatus is so extremely similar to this insect, that I am doubtful 

 whether it is more than a sport. If this be the case it is almost the only instance among 

 the Hawaiian Carabidae of a species in which no thoracic setae usually exist offering 

 abnormal specimens in which they are occasionally present. It is not uncommon for 

 species that normally possess the seta to occasionally throw off individuals in which it is 

 absent on one or (as an occurrence of extreme rarity) on both sides ; but the reverse case 

 is exhibited only in this species (if M. truncatus be actually a sport) and possibly in the 

 case of Mesothrisc2is collaris, which I have suggested may possibly be a sport of Metro- 

 memis cinctiis, though I do not think it will prove to be so. 



Hab. Kauai; Waimea, 4000ft., May and June 1894, August 1896 (Perkins). 



(15) JMctrojucnus sphodfnforinis sp. nov. 



Elongatus, piceo-ferrugineus, vel ferrugineus, antennis pedibusque elongatis, flavis ; 

 prothorace baud transverso, ad basin angusto, angulis posterioribus exactis, fere rectis ; 

 elytris sat profunde striatis. Long. 8 — 10 mm. 



Plate VI. fig. 10, individual from Molokai ; fig. 19, vestigial wing of example from 

 Maui, {b) of example from Molokai. 



The elongate form, in conjunction with the large size, long antennae and legs, and 

 comparatively narrow thorax readily distinguish this insect from the others of the genus 

 (except M. ctncfiis). The antennae are nearly 6 mm. long ; the head is narrow. The 

 thorax is never broader than long, and in some specimens is distinctly longer than broad, 

 usually it is just perceptibly longer along the middle than it is broad ; it is much narrowed 

 behind, and the hind angles are nearly rectangular, but just a little obtuse. The elytra 



