HEMIPTERA 153 



N^csidiolcstcs seiiiiiu, sp. nov. 



?. Apterous. Pale testaceous, irregularly striped and variegated with black. 

 Eyes black. Antennae pallid, multiannulate with black ; rostrum, pro- and mesosternum 

 and coxae pallid ; anterior femora and tibiae pallid triannulate with black. A pale 

 yellow tubercle in the middle of the lateral margin of each of the second to seventh 

 abdominal segments beneath. Apical margin of ventral sixth sinuate. 



Long. Corp. 9^ mm. 



Hab. Hawaii, Olaa (December), Perkins. Only one specimen. 



Subfam. NAB IN A E. 

 Reduviolu.s Kirby. 



Rediivio/iis Kirby, 1S37, Richardson, Faun. Bor. Amer. iv. p. 279 ; Kirkaldy, 1900, 

 Entomologist, p. 242; Kirkaldy, 1901, Wien. Ent. Zeit. p. 219. 



Aptus (Hahn, 1S31, nee descr.) Stal, 1S73. Svenska V'etensk. Akad. Handl. xi. 

 no. 2 [Enum. Hem. in.], p. 112. 



A^abis Leth. and Sev., Cat. gen. Hemipt. iii. p. 207 (nee Latr. typ.). 



A genus of world-wide distribution, which has established itself firmly in the 

 Hawaiian Isles. Its origin there is doubtful ; R. b/ackbnrni h&\ongs to a cosmopolitan 

 section of which the type is R. fcrits, Linne ; R. sitbrufus, rubritinctus and iiuvai have 

 some little likeness with certain American forms, perhaps more apparent than real ; the 

 others have no very near relatives. The genus is an exceedingly difficult one for 

 specific differentiation, owing to the variability of colour, general form, and even to a 

 certain degree of the male genital ' hooks ' (as first pointed out by Reuter, who has 

 devoted considerable attention to the subfamily). Moreover, pterygopolymorphism is 

 here rampant, and the modification or absence of the membrane and the change in 

 shape ot the pronotum under such circumstances render the accurate discrimination of 

 the species very difficult. Some considerable time elapsed before the palaearctic forms 

 were adjusted and variability is even more accentuated in the Hawaiian forms. 

 Dr Montandon's fine collection of these bugs, however, which I have had the good 

 fortune to acquire, has aided me in gaining some idea as to possible limits of specific 

 variation. 



Rediiviolus has been recorded from the Mayencian of Croatia and Prussian Amber 

 of the Ligurian Horizon, also from the Tortonian of Baden. 



It is very difficult to arrange an analytical table of these forms, but the following 

 may serve in the meantime : 



1. Ocelli distinct, elytra well developed 2. 



I a. Ocelli absent, elytra short {8) lusciosiis. White. 



2. First segment of antennae incrassate (7) rubritinctus, Blackb. 



20 — 2 



