REVISION OF COELIDIINAE 55 



Remarks. This species is closely related in general habitus to ventriosa and 

 can be separated from the latter species by the dorsal appendage with the apical 

 half narrowed and with a small, inflated flange apically between two sharp apices 

 on either side. 



This species is named for Dr W. J. Knight of the British Museum (Natural History). 



Tharra ventriosa sp. n. 



(Text-figs 124-128) 



Length: $ 4-00— 4-15 mm, 9 5"°o mm. 



General colour of g as in knighti; sexual dimorphism apparent. Female general colour 

 ochre and dark brown with numerous translucent ivor .1 cells of elytra. Crown piceous 



with ochre basally in <J, completely ochraceous in §; eyes fuscous; ; pronotum and scutellum 

 piceous in g, ochre in §; elytra piceous with a few small ochraceous spots on elytra in <$, light 

 fuscous with numerous ivory spots in cells in $; clypeus and clypellus piceous in <J, ochre in §. 



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

 eyes, distal length short, less than one-third entire median length, striate radially, slightly 

 carinate laterally, slightly depressed medially, lateral margins convergent basally, disk elevated 

 above eyes; ocelli small, situated anteriorly; eyes large and bulbous, occupying over 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 prominent, appendix well developed, venation as in description of genus; 

 clypeus long, anteriolateral margins broader than posteriolateral margins, with prominent 

 median longitudinal carina reaching just beyond antennal sockets, surface finely granulose, 

 anterior margin rugulose; clypellus with lateral margins expanded apically. 



Male pygofer in lateral aspect with long, narrow, curved process, process not equidistant 

 throughout, slightly broader basally and slightly enlarged apically, apex aperturized; aedeagus 

 in lateral aspect with dorsal appendage broad at basal half, subapical flange on ventral margin; 

 ventral appendage tube-like, reaching apex of dorsal appendage; gonopore apical; connective 

 Y-shape, style as in knighti; plate as in knighti. 



Female seventh sternum produced posteriorly on middle of caudal margin. 



Specimens examined. 



Holotype $, Philippines: Adm. I., Los Negros, on small broad-leaf herbaceous 

 plants, 9.1V.1945 (P. T. Riherd) (USNM, Washington). 



Paratypes. Philippines: allotype $, same data as holotype (USNM, Washington) 

 1 <$, same data as holotype (USNM, Washington). Bismarck Archipelago: 

 Rossun, 6 km S.E. of Lorengau, 180 m, I <$, 23.xii.1g59 (T. C. Maa); New Britain, 

 Gazelle Pen., Kerovat, 60m, 1 <$, 29.viii.1955 (/. L. Gressitt) (BPBM, Honolulu); 

 Manus, Lorengau, 1 £, 2i.vi.i962 (Noona Dan Expn, 61-62) (UZM, Copenhagen); 

 1 <$, same data as holotype, in author's collection. 



Biology. This species was collected from unidentified herbaceous plants in 

 the Philippines. Collection records indicate that the species is prevalent from 

 June to December. 



Remarks. From knighti, to which it is similar in general habitus, ventriosa 

 can be distinguished by the dorsal appendage of the aedeagus with the ventral 

 subapical flange. 



