CHBYSIS. 453 



531. Chrysis triacantha, Mocsdry (Trichrysis), Mon. Chrys. 1889, 

 p. 325; du Buyss. Jour. Bomb. N. H. Soc. x (1896), p. 471. 



$ . Dark metallic green or bluish green, the space round the 

 ocelli, the median lobe of the mesonotum, the middle of the 

 scutellum, and the disc on either side of a median line on the 2nd 

 and 3rd abdominal segments purplish, the purple on the abdomen 

 very much lighter in colour and forming only a transverse spot on 

 the 3rd segment, round the ocelli and on the mesonotum anteriorly 

 the purple grades into black ; the antennae black, scape in front 

 and 1st joint of flagellum above green ; legs green, the inner side of 

 the femora dark, the inner side of the tibiae and the whole of the 

 tarsi lighter brown ; head and thorax closely, moderately coarsely 

 punctured, granulate, abdomen more finely punctured ; a space at 

 base of the scutellum almost smooth, with minute punctures ; 

 pilosity brownish, somewhat sparse. Head broader than long, the 



Fig. 154. Chrysis triacantha, $. a. Head from front. 



eyes prominent ; facial cavity rugulose, covered somewhat densely 

 with white hairs ; clypeus broad, emarginate in the middle anteriorly, 

 frontal transverse carina very short ; anterior ocellus not enclosed 

 within a carinate space, occiput transverse. Thorax : the pro- 

 notum short, transversely rectangular, medially impressed in front, 

 the side emarginate at base, the anterior lateral angles somewhat 

 truncate ; propleurae excavate ; mesonotum, scutellum and post- 

 scutellum very convex, median area on mesonotum broadened 

 anteriorly ; mesopleurse longitudinally impressed, the apex beneath 

 not dentate ; median segment suppressed beneath the postscutellum, 

 posterior lateral angles shortly produced, acute ; wings hyaline, 

 very lightly fuscous, nervures brown, tegulae greenish blue. Abdo- 

 men a little depressed, deeply sulcate in the middle at base above, 

 the sulca short and smooth within, a shallower impression on each 

 side of the medial groove ; 2nd and 3rd segments lightly medially 

 carinate, the anteapical series of foveae on the latter few, 6-8, large 

 and open, apical margin armed with 3 teeth. 3 unknown. 



Length, $ 6'8-7 ; exp. 13 mm. 



Hob. Eecorded so far from Calcutta (du Buysson) and Ceylon 

 (Green) ; extending to the Malayan subregion. 



532. Chrysis singalensis, Mocsdry (Trichrysis), Mon. Chrys. 1889, 

 p. 324. (PI. I, fig. 4.) 



$ . Metallic green, with golden effulgence on the sides of the 



