REVISIONARY CLASSIFICATION OF RUTILIINI 41 
dilation is more or much more extensive and rounded anteriorly. In Rutilodexia 
the anterior part of the genal dilation is very remote from the epistome and is not 
as far forward on the head as the level of the front of the eye; in Rutilia the anterior 
part of the dilation normally reaches forward to or beyond the level of the front of 
the eye and is thus less remote from the epistome. 
The ¢ genitalia of Rutilodexia species have no special characteristics; the surstyli 
and cerci have a simple form (Text-fig. 90) generally resembling that found in a 
number of Ruwutilia s.1. species. 
The form of the genal dilation and close resemblances in all other characters 
indicate without doubt that Bothrostira prisca Enderlein is congeneric with, though 
a separate species from, Rutilodexia angustipennis (Walker), and Enderlein’s generic 
name Bothrostiva therefore falls in new synonymy with Rutilodexia. It is certain 
also that Paramonov’s (1968) posthumously published and unavailable name 
Rutilosia applies to the same concept (because the manuscript notes left at his 
death show that Paramonov included angustipennis Walker in Rutilosia without 
him appreciating that this nominal species was already type-species of Rutilodexia). 
Comparison of Enderlein’s types of B. prisca ($) and Idania ralumensis (2), in con- 
junction with later collecting of both sexes, shows that both names apply to the same 
species; as valumensis is certainly the female of prisca (though Enderlein (1936 : 
409, 413) had the nominal species in separate genera) the names are here placed in 
new synonymy, with prisca treated as the valid name because based on a male type. 
R. papua (Bigot) is perhaps the same species as R. angustipennis (Walker) but 
there is not sufficient evidence at present to justify synonymy. 
Nothing is known of the hosts of Rutilodexia species. 
INCLUDED SPECIES 
Rutilodexia angustipennis (Walker). Aru IsLtanps. [Holotype examined]. 
R. papua (Bigot) comb. n. NEw GuiNnEA. [Lectotype examined]. 
R. prisca (Enderlein) comb. n. NEw Britain. [Holotype examined]. 
valumensis (Enderlein) syn. n. [Lectotype examined]. 
Kry TO SPECIES OF THE GENUS RUTILODEXIA 
[Note : The primary types of angustipennis and papua are male and female respectively, and 
the opposite sexes cannot yet be positively associated. | 
© Males _. : : ‘ é : : : : ; : : : : 2 
— Females . : 4 
2 Hind tibia with a strong submedian ad seta and a very realli inconspicuous ad fringe. 
Hind femur with a row of strong av setae on the apical half. [Aru Islands & New 
Guinea] : : R. angustipennis 
— Hind tibia without a submiedian ad seta and - Ww ith 2 a well dev dloped regular close-set ad 
fringe. Hind femur without strong av setae on apical half, the vestiture hair-like 
(New Guinea & New Britain] : 
3 Dorsum of thorax and abdomen contrasting in colour; the es and scutellum 
metallic dark green or bluish green and the abdomen tawny yellowish with a 
conspicuous black median line. [New Britain] 4 ; . &. prisca 
— Dorsum of thorax and abdomen more or less concolorous, dark brow nish or blackish 
brown with a purplish green or violaceous sheen and without a noticeable dark 
median line on the abdomen. [New Guinea] . : Undetermined sp. (? papua 3) 
