no FAUNA HAWAIIENSIS 



in some of the Intermediate varieties connecting the forms of P. varians. .In P. 

 dm'winianas the colour is however uniformly distributed. 



It should be noticed that the red-leggedness of P. dartoiniamis is not due to mere 

 deficiency of black pigmentation as compared with P. varians ; for the black pigmenta- 

 tion of the wing-cases is much more extensive and decided than it is in even the 

 darkest varieties of P. varians. 



(19) Plagithmysus laniarckianus, sp. nov. 



Rufo-flavus, antennis pedibusque rufis, femoribus basi flava, apice plus minus 

 late nigricante ; thorace vel nigro vel rufo, sat conspicue albido-vittato ; elytris 

 flavescentibus, dense punctatis, dorso late longeque nigro, singulo ad suturam linea 

 albido-pubescente anterius versus latus divergente. Long. 9 — 15 millim. 



Plagithmysus varians, var. y, Sharp, t. c. p. 245. 



Van a, femoribus rufis. 



This species is somewhat doubtfully distinct from P. darivinianiis. The pubescence 

 of the under surface and of the legs is less elongate, the antennae are slightly thinner 

 and usually darker in colour towards the tip, and the legs are usually more or less 

 broadly black. As minor distinctions we may mention that the elytra are usually 

 broader at the base, and are there never distinctly marked with white hairs ; their 

 black portions and the white lines on them are usually a little more extensive ; the 

 thoracic crest is a little more elevated on its posterior part. 



Hab. Hawaii; Kilauea, August 1896, on the " mamake " or paper-mulberry. 

 Although this lives in the same locality as P. darwinianiis it frequents different trees, 

 being attached to the Urticaceous trees, Pipturus albidus, and Urera sandwicensis. 

 I have seen -^t^ specimens ; the varieties with entirely red femora are very similar to 

 P. dai-winianus, and it is possible that it may prove that the two forms are not distinct 

 species when more specimens are obtained. There were several specimens of P. 

 laniarckianus in the series I originally referred to P. darwinianus, and I am indebted 

 to Mr Perkins for directing my attention to the fact that there are probably two 

 distinct forms. 



(20) Plagithmysus albert isi Sharp. 



Plagithmysus albert isi Sharp, Ent. Mo. Mag. xxxiii. 1897, p. 12. 



(Plate VI. fig. 17; 2.) 



Hab. Oahu ; West Honolulu, Feb. 25th, 1874; Signor d'Albertis. There is 

 reason to fear that this species may now be extinct. 



