go M. W. NIELSON 



Specimens examined. 



Australia: Queensland, Black Mountain Rd, near Kuranda, 300 m, 1 <j?, 7.V.1961 

 (L. & M. Gressitt); Q., Coolangata, 1 <$, viii. 1910 (F. Muir) (BPBM, Honolulu); Cj., Conandale, 

 3 (J, 1 $, i.vii.1930 (H. Hacker), in author's collection; Q., Mt Gipps, 2 $, 20. iv. 1930 (H. Hacker); 

 Q., Maleny, 4$, 20.1.1935 (H. Hacker) (USNM, Washington); Q., Iluka Rain Forest, Clarence 

 R. National Monument, 2 $, 22.ii.1963 (McAlpine <S< Lossin) (SAM, Sidney); 1907 (F. P. Dodd) 

 (BMNH, London). 



The holotype specimen was not examined, but I have based my interpretation of 

 this species on authentically determined material received from Dr J. W. Evans, 

 who made comparisons of the specimens with the holotype. The holotype female 

 is in the South Australian Museum, Sydney. 



Biology. Unknown. Collection records indicate that this species is prevalent 

 from January to August. 



Remarks. Among the very few species of Tharra that occur in Australia, leai 

 can be separated from those by the presence of a pair of long, curved spines on the 

 dorsal margin of the dorsal appendage of the aedeagus. 



Tharra costata sp. n. 



(Text-figs 234-238) 



Length: g 5-10 mm, $ 5-90-6-00 mm. 



General colour testaceous with ochraceous stripes on elytra; sexual dimorphism apparent. 

 Crown testaceous, suffused with fuscous; eyes rufo-fuscous; pronotum testaceous at basal 

 half; ochraceous at apical half; scutellum deep ochraceous; elytra testaceous with a small 

 ochraceous spot on clavus in <3\ broad ochraceous stripe from apex of scutellum to apex of 

 wing in § ; ochraceous band along middle of costal area ; clypeus ochraceous, fuscous or testaceous 

 along anterior margin; clypellus ochraceous. 



Head narrower than pronotum; crown short and broad, produced distally beyond anterior 

 margin of eyes, distal length about one-third entire median length, striate radially, slightly 

 depressed medially, somewhat declivous anteriorly, lateral margins converging basally, disk 

 elevated considerably above level of eyes; ocelli small, situated anteriorly; eyes moderate 

 size, somewhat globular, occupying a little over half of entire dorsal area of head; pronotum 

 moderate size, median length about equal to median length of crown, dorsal 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 excised near antennal 

 sockets, without median longitudinal carina, surface finely granulose, narrowly rugulose along 

 anterior margin; clypellus with lateral margins constricted medially, expanded apically. 



Male pygofer in lateral aspect with long, narrow, slightly curved process arising from 

 caudoventral margin, process very narrow throughout, slightly broader basally, sharply 

 attenuated apically; aedeagus in lateral aspect with dorsal appendage broad basally, becoming 

 narrowly attenuated subapically, constricted subapically, expanded apically and slightly 

 curved caudodorsally ; dorsal appendage with a pair of subbasal spines on dorsal margin, 

 ventral margin with a few very short tooth-like projections basally; ventral appendage long, 

 tube-like, broken off about middle in type-specimen; connective Y-shaped; style broadly 

 hooked apically; plate with distal segment elongate, dorsal margin expanded medially. 



Female seventh sternum with posterior margin produced medially. 



