648 FAUNA HAWAIIENSIS 



(4) Plagitlmiysits elegans, sp. nov. 



Rufus, prothorace ochraceo-vestito, post oculum vitta denudata, dorso longitudin- 

 aliter nigerrimo ; elytris dense vermiculatim albido-setosis, post medium utrinque area 

 glabra ; tarsis posterioribus albido-hirtis ; femoribus posterioribus basi flavescente ; 

 corpore subtus ochraceo-maculato. Long. corp. 14 mm. 



This is the most elegant of the Hawaiian Plagithmysus ; it is not at all closely 

 allied to any other, and may be placed as the first species of the genus. The broad 

 black space on the middle of the thorax is of a narrow oval form, and contrasts in 

 a most striking manner with the broad yellow area that joins it on each side ; there 

 are no ridges across it ; in front it forms an abrupt perpendicular elevation, and 

 falls away more gently behind. The elytra are red, vaguely but broadly infuscate 

 behind the base, and on this part densely and coarsely punctured : bearing white spots 

 of setosity which, in some places, are elongate or confluent so as to form sinuous 

 markings ; towards the apex each elytron has an elongate, glabrous, shining area. 

 The legs are moderately long, the hind femora a little darker red than the others, but 

 the slender basal portion is pale yellow : there is not the least tendency to a knob at 

 the apex, but they bear a good deal of delicate, erect, white setosity. The hind tibiae 

 are only moderately long, are strongly laterally compressed, and densely clothed with 

 hair that is nearly black in colour ; the hind tarsi are equally densely clothed with pure 

 white hair, and contrast therefore with the tibiae in a very striking manner. The 

 middle tarsi bear white hairs along the inner margin only. The sides of the body 

 beneath have conspicuous ochreous marks, and the breast has a good deal of white 

 pubescence, which is dense on the mesosternal process. Described from a single 

 individual of the male sex. 



In the style of coloration and the shape of the thorax this charming insect makes 

 a distinct approach to the genus Callithniysus, but the legs remain quite different. 



Hab. Hawaii; North Kona in 1900 (Perkins). D. S. 



(5) PlagitJimysus siniplicicollis, sp. nov. 



Rufus, elytris ad basin et ad suturam ochreo-tomentosis, margine laterali etsi 

 anguste-tomentoso, post basin fusco-biplagiatis, femoribus posterioribus et intermediis 

 basibus testaceis, tarsis posterioribus albido-hirtis. Long. 14 — 15 mm. 



This fine Plagitlwiystis may be placed near F. bisJiopi, from which, as well as from 

 most of the other allies, it may be at once distinguished by the unicolorous prothorax, 

 entirely destitute of white stripes. The two large spots of dark colour near the base of the 

 elytra are very conspicuous and very sharply limited, each is narrowly separated from the 

 suture by the ochreous pubescence and extends all across the disc of the elytra, becoming 

 narrower externally. The legs are red, which allows the species to be readily separated 



