REVISION OF COELIDIINAE 81 



I $, 2-11.vii.1962 (J. L. Gressitt) (BPBM, Honolulu); Wisselmercn, Kamo-Debai 

 dist., 1700 m, 1 (J, 1 $, 13.viii.1955 (J. L. Gressitt), in author's collection. 



Biology. Unknown. Collection dates showed that the species is prevalent 

 in July and August. 



Remarks. This species is similar in aedeagal characteristics to bidentis and 

 can be separated from that species by the very large pygofer process and ventral 

 appendage of the aedeagus which exceeds the apex of the dorsal appendage. 



Tharra bidentis sp. n. 



(Text-figs 204-208) 



Length: £ 4'40-5-oo mm, 9 5 00 mm. 



General colour fuscous to piceous in $, deep ochraceous in 9; sexual dimorphism apparent. 

 Crown piceous in <-£, ochraceous in $; eyes grey to fuscous; pronotum and scutellum piceous 

 in <$, ochraceous in §; elytra piceous with large ochraceous spots throughout in <$, ochraceous 

 on clavus, fuscous with ochraceous spots in cells in $, clypeus and clypellus piceous in <$, 

 fuscous in $. 



Head narrower than pronotum; crown long and narrow, produced distally beyond anterior 

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

 lateral margins slightly convergent basally, disk elevated above eyes; ocelli small, situated 

 anteriolaterally; eyes large, somewhat elongate, occupying nearly two-thirds entire dorsal 

 area of head; pronotum short, median length less than median length of crown, surface finely 

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

 elongate, veins slightly obscured, appendix well developed, venation as in description of 

 genus; clypeus long, slightly broader anteriorly than posteriorly, without median longitudinal 

 carina, constricted near antennal sockets, surface finely granulose. rugulose on anterior margin; 

 clypellus with lateral margins slightly concave. 



Male pygofer in lateral aspect with long, narrow, curved process, process with lateral 

 margins nearly equidistant, constricted slightly subbasally, sharply attenuated apically, 

 aperturized on inner lateral margin at apical third; aedeagus in lateral aspect with dorsal 

 appendage broad throughout, slightly truncate apically; dorsal appendage with a pair of 

 long, lateral, subapical spines or processes and a long membranous subventral flange medially; 

 ventral appendage long, narrow, triangulate apically, reaching apex of dorsal appendage; 

 gonopore apical; connective Y-shaped; plate with distal segment elongate, curved dorsally. 



Female seventh sternum with posterior margin acutely angled. 



Specimens examined. 



Holotype <$, New Guinea: Wisselmeren, 1700 m, Waghete, Tigi L., 17.viii.1955 

 [J. L. Gressitt) (BPBM, Honolulu). 



Paratypes. New Guinea: allotype $, Wisselmeren, Enarotadi, 1900 m, i.viii.1955 

 (/. L. Gressitt) (BPBM, Honolulu); Wisselmeren, Enarotadi, 1900m, i.viii.1955 

 (J. L. Gressitt) (BMNH, London); Wisselmeren, Itouda, Kamo V., 1 J 1 , 14.viii.1955 

 (/. L. Gressitt), in author's collection. 



Biology. Unknown. This species is prevalent in August. 



Remarks. From permagna, to which it is similar in male genital characteristics, 

 bidentis can be distinguished by the long, narrow pygofer process and the dorsal 

 appendage of the aedeagus with the long, membranous medial flange and the spines 

 arising subbasally from the lateral margin. 



F 



