COLEOPTERA 275 



thorax is different, being more narrowed behind and that In a straighter (less curved) 

 Hne, the hind angle is much better marked. It is larger than M. curtipcs, and has a 

 more elongate after-body. In the shape of the thorax and the polished elytra it is 

 different from M. scaritoides. 



Hab. Maui. Jao Valley, \V. Maui ; March 1S94 (Perkins). 



(15) Mctrofhorax debilis, sp. no v. 



Brevior, piceus, politus, antennis palpis pedibusque Havis, elytris nigricantibus, 

 marginibus et apice rufo-testaceis ; prothorace transverse, basin versus fortiter angustato, 

 angulis posterioribus parum obtusis fere rectis, basi fere impunctata ; elytris brevibus, 

 stria suturali sat profunda, striis externis obsoletis. Long, vix 4 mm. 



Closely allied to M. ciirtipes, rather smaller than the smallest individuals of that 

 species, with the thorax less strongly transverse, and the elytra in proportion shorter ; 

 the hind angles of the thorax are better marked, the base is narrower, and the anterior 

 parts of the insect are more dilute in colour. Four specimens. 



Hab. Molokai. Kalawao, 4000 ft., August 1893 (Perkins). 



(16) Alctrothorax disccdcns, sp. nov. 



Subdepressus, sat nitidus, niger, antennarum basi, palpis pedibusque testaceis ; 

 thoracis et elytrorum marginibus elevatis flavescentibus ; thorace transverso, angulis 

 posterioribus obtusis ; elytris subtiliter striatis, striis externe et ad apicem evanescentibus. 

 Long. 3^ mm. 



This is quite different from its congeners, and by its appearance recalls iM. micans 

 and allies. The antennae are short. Thorax strongly transverse, a good deal narrowed 

 behind, hind angles very obtuse, anterior impression absent, median channel distinct, 

 basal punctuation slight. Elytra rather broad and flat, with tour or five striae, not 

 distinctly punctured, and much abbreviated : the suture behind as well as the external 

 margin rufescent. 



o 



Though we have received only one example, there can be no doubt this is a quite 

 distinct form. 



Hab. Maui. Mount Lahaina, 3000 ft., January 1S97 (Perkins). 



Group BEMBIDIIDES. 



We have obtained a comparatively small number of species of this group, but they 

 are of great interest, and being small forms it is probable that careful research would 

 reveal several others. Kauai is clearly the metropolis of the Hawaiian Bembidiides, and 

 its high plateau and ridges will require to be very carefully worked before we can 

 consider that the island has revealed to us all its small forms. 



I have previously remarked that St Helena possessed a parallel Bembidiid Fauna 



