210 SPOLIA ZBYLANICA. 



DESCRIPTION OF A NEW SPECIES OF "OPIUS" FROM CEYLON. 



By P. Cameron. 



Opius dacusii, sp. nov. 



LUTEOUS, the flagellum of antennae and the hinder tibiae and 

 tarsi black ; the wings hyaline, with black stigma and 

 nervures ; ?. Length near 5 mm. ; terebra fully 5 mm., Pera- 

 deniya; bred by Mr. E. E. Green from Dipterous maggots 

 infesting fruit of Cacurbitaceae. 



Antennae longer than the body, over 60-jointed, towards the 

 apex minutely haired. Head smooth and shining, the face 

 covered with white pubescence. Prothorax and mesothorax 

 smooth and shining, the parapsidal furrows deep ; middle lobe 

 of mesonotum clearly separated, long, gradually narrowed from 

 the base to the apex which reaches close to the scutellum. 

 Scutellar depression wide and deep ; a stout keel in its centre. 

 Metanotum areolated ; the areola large, its base narrowed to a 

 sharp point ; the rest slightly, gradually narrowed towards the 

 apex, which does not reach to the end of the segment; it is 

 closed and transverse there ; there is a somewhat triangular area 

 bordering the base of the areola ; the other areae are not very 

 clearly defined. The basal two segments of the abdomen are 

 closely, regularly, longitudinally striated ; the other segments 

 are smooth and shining ; the first is longer (but not much) than 

 its width at the apex ; the second is wider than long. Pleurae 

 smooth. Mandibles black on the apical half. First abscissa of 

 radius very short, basal abscissa of radius curved ; the recurrent 

 nervure is received in the second cubital cellute ; the transverse 

 median nervure is received distinctly beyond the transverse 

 basal. Malar space as long as the antennal scape ; the clypeal 

 foveas large, deep. There is a stout keel down the centre of the 

 basal abdominal segment, the lateral striae being weak compared 

 with it. The abdomen is slightly shorter than the thorax, broad 

 and sessile at the base ; the apex is bluntly rounded. Meso- 

 pleural furrow smooth. 



