522 FAUNA HAWAIIENSIS 



locality, and within the same month. The same difference was noted between two 

 specimens of A. sculphis. I think it highly probable that it is a sexual distinction'. 

 In A. makavoeliae it is to be noted that the presence of oblique striae on the elytra is 

 not correlated with the presence either of simple or aciculate punctures ; there are three 

 specimens, two in the aciculate, the third in the simple-punctured group, with two oblique 

 striae on either elytron, while in all other specimens the striae are not visible. Wings 

 not reduced. Eight specimens. 



Hab. Kauai ; all from Makaweli, 2500 ft. 11. 1897 ("O- 668, Perkins). 



(12) Acritus waianaae, sp. nov. 



A. basalts van Sharp, Tr. Dublin Soc. iii. 1885, p. 226. 



A. siibbasali SL^ms; prothorace crebre punctato, ante basin in medio punctis parum 

 fortioribus (sed haud transversim impresso); elytris parum lortius, sat aciculatim, 

 punctatis ; prosterno eo A. sitbbasa/is parum latiore ; mesosterno impresso, punctato, 

 sed haud rugoso ; metasterno fortius eo A. snbbasaiis punctato. Long. 1 mm. 



A depressed form, much resembling A. subbasalis, but more strongly punctured. 

 The thoracic punctures become rather stronger in the mid-basal region, but there is no 

 definite transverse impressed line. Elytral punctuation coarser than in A. sjibbasalis, 

 the punctures slightly aciculate, but not drawn out into the sharp fine scratches seen in 

 that species and in A. gei^vianus. The keel of the prosternum (PI. XV. fig. 15) is of 

 the same form as, but slightly broader than, that of A. subbasalis : mesosternum some- 

 what impressed and punctate, but quite lacking the rugosity seen in that species. 

 Metasternum with rather numerous punctures, first abdominal segment with very fine 

 rare punctures. Wings not e.xamined. Two specimens. 



Hab. Oahu. Waianae mountains: one specimen found by Blackburn, and pre- 

 viously labelled "Ae/eics basa/is van"; the other found by Mr Perkins, iv. 1892 (no. 12). 



(13) Acrifiis basa/is (}). Leconte. 



Acritus basalis Sharp, Tr. Dublin Soc. in. 1885, p. 226. 



? Acritus basalis Leconte, Ann. Lye. Nat. Hist. v. p. 170; P. Ac. Philad. 1853, 

 p. 290. 



Several specimens found by Mr Blackburn in mountain localities in Oahu were 

 referred to the N. American species A. basa/is Leconte, stated by Horn (P. Amen 

 Phil. Soc. XIII. 1873, p. 357) to occur in the region near Fort Yuma, California. I 

 have examined four of these; one is labelled " Ae/etcs basa/is." the other three were 



' See J. Gerhardt, Deutsche ent. Zeitschr. 1903, p. 239. Two forms of the European Acri/us uigricornis 

 were found in the same locaHty, one with simple punctures on the elytra, the other with aciculate punctures 

 ("Strichpunkturen"). Ten specimens of each were examined; all of the first form proved to be males, all of 

 the second females. 



