244 FAUNA HAWAIIENSIS 



be seen. The thorax is not greatly narrower than the elytra, and is more gently narrowed 

 behind than in most of the other species, the base being broad. Twenty-three specimens. 

 This is only likely to be confounded with M. ntsticus, but the much narrower elytra, 

 with the punctures very fine and more obliterated at the tip, readily distinguish it : there 

 is almost a complete absence of real striation, the sculpture consisting of series of fine 

 punctures. This distinguishes the species from M. angtisticollis. 



Hab. Maui. Haleakala: 9000 — 1 0000 ft., April 1894; "above the forest," one 

 specimen (Perkins). No. 1263, Prof. Thaxter for Laboullieniaceae. 



(2) Mecyclothorax nuhicola, Blackburn. 



Cyclothorax imbicola Blackburn, Ent. Mo. Mag. xv. 1877, p. 156. 



Cyclofhorax ritpicola (in error) Sharp and Blackburn, Trans. Dublin Soc. (2) in. 

 1S85, pp. 216 and 276. 



This insect is known only from a single specimen found by Mr Blackburn 25 or 30 

 years ago. I have examined this specimen, and find that it is nearest to M.pnsilliis, but 

 is considerably larger and more elongate, and of a pale reddish colour. It may prove 

 to be a very aberrant form of M. pusillus but at present we have nothing to connect 

 the two. 



Hab. Maui. Haleakala (Blackburn). 



(3) Mecyclothorax rnsticus, sp. nov. 



Colore variabilis; piceus vel piceo-rufus, interdum nigricans, elytrorum sutura margini- 

 busque rufis; haud angustus ; antennis pedibusque rufo-testaceis ; thorace transverso. basin 

 versus sat angustato, ante basin haud constricto ; elytris seriebus 4 vel 5 punctorum minus 

 subtilibus sed ante apicem obsolescentibus, ibidem striis subtilibus. Long. 4 mm. 



The after body in this species is of more oblong form than it is in M. iiiicaiis, the 

 thorax is rather longer and less rounded at the sides, and the elytral punctuation is coarser 

 and more effaced. The colour is usually obscure red, or piceous, but sometimes is black. 

 Thriscothorax apicalis is also very similar to M. rustictis, but besides the chaetotaxal 

 distinction it always has a remarkably definite pale patch at the tip of the elytra. 

 M. piisi/iiis is smaller and narrower and has series of punctures, rather than punctate 

 striae on the elytra. Many specimens. 



Hab. Maui. Haleakala. About the crater ; in April and October (Perkins). 



(4) Mecyclothorax micans Blackburn. 

 Cyclothorax n/icans Blackburn, Ent. Mo. Mag. xv. 1877, p. 122. 

 Niger, nitidus, subdepressus, antennis rufis, pedibus flavis ; thorace fortiter trans- 

 verso, laterijjus multum rotundatis, ante basin nullo modo constricto, basi lata ; elytris 



