242 [November, 



Agrees in faciea with P. pulveridentus, though totally different in colour. 

 Antennae long and slender, yellowish. Thorax dull, densely sculptured, rough above, 

 with two transverse irregular short lines behind the middle ; at the sides more 

 distinctly punctured, but slightly shining and almost without pubescence. Elytra 

 very densely punctured, broad at the base, yellow, with a very large common black 

 mark, extending from near the tip to near the base, and within about one-fifth of 

 the whole length ; thus a broad lateral margin and a still broader basal area are left 

 yellow ; the dark part is very finely and densely punctured, and in one light is seen 

 to bear a very minute white pubescence, which, however, does not extend to the 

 anterior part of the dark mark. The legs are dark red, with much white setosity ; 

 on the apices of the hind tibiae the hairs are more scanty and darker in colour ; the 

 hind tarsi with dense white hairs. 



Kaala, Oahu, 1000 ft. ; March, 1893 ; eighteen specimens. 

 There is great variation in size, and the smaller of the specimens 

 have some small flecks of pubescence on the apical parts of the elytra. 



Plagithmtsus Finschi. 

 Glytarlus Finschi, Harold, Mt. Miinchen. Ent. Ver., 1880, p. 166. 

 Haleakala, Maui, 4000 ft. ; May, 1896. 



The variation in size, from 9^ to 21 mm., is very great, but in 

 other respects the fine series secured by Mr. Perkins is unusually 

 constant. The female appears to be on the average larger than the 

 male. 



Plagithmtsus pulvebulentus. 

 Plaqithmysus pulverulentus, Motsch., Bull. Mosc, 1845, II, p. 370. 

 Clytarlus robustus, Shp., Tr, Ent. Soc. London, ]878, p. 206. 

 Kaala, Oahu, 2000 ft. ; April, 1893. 



The small series procured by Mr. Perkins surpasses any of the 

 other species in variation in size, which is from 5^ — 18 mm., an extreme 

 exhibited by few insects. 



Plagithmtsus Bishopi, n. sp. 



Niger, antennis elytris pedihusque rufescentibus, femoribus extrorsum 

 nigris, thorace vittis quatuor albidis ; elytro singula linea pubescente albida, 

 anterius versus latus divergente, ante lineas has ad suturam plaga angusta 

 nigra. Long., 14 — 17 mm. 



Antennse elongate, tei-minal joint in the male unusually long. Thorax rounded 

 at the sides, and much narrowed in front ; black, with four vittse of white delicate 

 pubescence ; the line of asperities along the middle unusually narrow, forming a sort 

 of carina only distinctly elevated in front. Elytra fulvous-red, rough at the base, 

 and on this part with a few minute white hairs, behind this with a narrow patch of 

 black tomentum at the suture joining its fellow ; behind this with a line of white 



