186 M. W. NIELSON 



slightly carinate laterally, slightly depressed medially, lateral margins somewhat convergent 

 basally, disk elevated considerably above level of eyes; ocelli small, situated anteriolaterally ; 

 eyes moderate size, semiglobular, occupying about two-thirds entire dorsal area of head; 

 pronotum moderate size, median length about equal to median length of crown, surface finely 

 knobbed; scutellum large, median length greater than median length of pronotum; elytra 

 elongate, veins prominent, appendix well developed, venation as in description of genus; 

 clypeus elongate, broad anteriorly, narrowed posteriorly, lateral margins prominently excised 

 at middle near antennal sockets, without median longitudinal carina, surface finely granulose, 

 narrowly rugulose along anterior margin; clypellus with lateral margins expanded apically. 



Male pygofer in lateral aspect with long, rather broad process arising from caudoventral 

 margin, process broad basally, becoming evenly attenuated apically, apical third slightly 

 sinuate along outer lateral margin; aedeagus in lateral aspect with dorsal appendage broad 

 at basal half, becoming attenuated apically, slightly constricted subapically and curved 

 caudodorsally, without flanges or spines ; ventral appendage long, tube-like throughout, slightly 

 extending beyond apex of dorsal appendage and slightly expanded apically; gonopore apical; 

 style clawed apically; plate with distal segment elongate, over twice as long as wide, dorsal 

 margin expanded medially. 



Female specimen with abdomen missing. 



Specimens examined. 



Holotype £, New Guinea: Sepik, Angoram, 20-80 m, 14-16.viii.1969 (/. L. 

 Gressitt) (BPBM, Honolulu). 



Paratypes. New Guinea: allotype $, W. Highlands, Kubor Range, 2950 m, 

 22.V.1966 (J. L. Gressitt) (BPBM, Honolulu); 1 J, same data as holotype (BPBM, 

 Honolulu); 4km W. of Green River, post, 200m, 1 <$, 29.vi.1963 (R. Straatman) 

 in author's collection. 



Biology. Unknown. 



Remarks. This species is similar in general habitus to atriceps but can be 

 separated from that species by the long, blade-like pygofer process with its apical 

 serrate margin. 



Tharra oxyomma (Kirkaldy) comb. n. 

 (Text-figs 504-506) 



Muirella oxyomma Kirkaldy, 1907 : 79. Holotype $, Fiji (BPBM, Honolulu) [examined]. 

 Muivella oxyomma Kirkaldy; Linnavuori, 19606 : 31. 

 Muirella oxyomma Kirkaldy; Metcalf, 1964 : 22. 



Length: ^ 6-oo mm, § 5-90-6-40 mm. 



General colour ochreous with red longitudinal vittae on crown and brown chevron markings 

 on elytra. Crown with broad suffused red longitudinal vitta on each side of middle, yellow 

 ochre medially; eyes reddish brown; pronotum and scutellum light ochre to light brown; 

 elytra deep ochre with two brown discontinuous chevron stripes, one across middle of clavus, the 

 other below, small brown spot subapically on appendix, sometimes continuing below, apex 

 with narrow brown band; clypeus ochre with narrow very light ochraceous band anteriorly, 

 bordered by narrow brown to fuscous band below; clypellus light brown (description from 

 females) . 



Head narrower than pronotum; crown produced distally beyond anterior margin of eyes, 

 distal length over half entire median length, striate radially, slightly depressed medially, lateral 

 margins nearly parallel, disk elevated above eyes; ocelli small, situated laterally; eyes moderate 



