499 



8 (P) Basal joints of the antennae with dense and very eonspienons 



bristly black hairs; hind femora normally black (except the 

 basal stalk) and partially red-legged examples infrequent. 

 (On Sophora, Kona side of Hawaii) hJnclburiii. 



9 (8) Antennae evidently less strongly setose, examples with largely 



red hind femora are common, though perlia])s more are like 

 typical iJackbunii. 

 (Pubescent lines of elytra either wliite or distinctly yellow 

 being variable; food plant Pipfuriis) hiDuircliditus. 



10 (1) Antennae black or practically so throughout, exce]it tluit in 



some examples the sca])e is pitchy or, more rarely, distinctly 

 red; the pubescent lines on the elytra yellow and wide, not 

 or hardly furcate at the base, though the basal edge is 

 emarginate. 



11 (12) Elytra yellow or rufescent basally and at the sides. 



(Food plant Urera.) suliiliurcscens. 



12 (11) Elytra yellow at the sides as far forward as tiie base of the 



yellow pubescent nmrking or somewhat in aihance of this, 

 but black above from the base of this marking to the base 

 of the elytra themselves. 

 (Food plant Suftonid.) fjiff'ardi. 



P. zifficolUs is best disting-tiished from the var. lo)i,i::iiliis 

 by the dense white clothing- of the hind tarsi, that of the latter 

 being black, sometimes with a few white hairs mixed, just as 

 the other may have a few black ones. In life, ritt'icolUs always 

 appeared to me a brighter insect, owing, I think, to the rather 

 greater dexelopment of the yellow pronotal stripes. So far as 

 is known the var. loui^ulns never produces varieties with more 

 or less yellow elytra. 



The species of Plai^itlimysiis which are attached to Pclca, 

 whether on Hawaii or other islands, are always distinguishable 

 from the members of the blackburni group at the merest glance 

 by the deep velvety black spot in the furcation of the pubescent 

 lines of the elytra, which to my eyes gives them a more pleas- 

 ing appearance than the others. The following form appears 

 to be either a new species or at least a new race of P. I'icinits 

 Sh. Originally I possessed a small series of this new form, 

 but having given away specimens under the name z'iciniis, I 

 now have only a pair left. It was found on a species of 



