50 Mr. C. G. Lamb on Exotic Chloropidae. 



the enrls o£ 2 and 3, but does not extend to the end of wing 

 or down to vein 3. 



Halteres with ivory-white heads. 



Lej^s mainly orange, all the coxae black and all femora 

 broadly ringed witli black. 



Abdomen : dorsum flattened, a little longer than broad, 

 and tai;eriug in outline from the ba^e ; it is of a quite unique 

 colour, being all sutfused with a dense milky-blue glaze; 

 the last segment is considerably longer than the others; 

 beneath, the abdomen is orange ; the last segment, which is 

 bent under, is all shining black. 



Size about I5 mm. 



Cam. Coll., Peradeniya, Ceylon (J. C. F. Fryer). 



Ops, Becker. 

 O. madagascariensis, End. 



A specimen in Cam. Coll., Durban [F. M.), differs from 

 the ordinary form only in the iemora bemg somewhat 

 darkened. 



O. callichroma, Loew. 



There are two specimens of this species — the one in Bur. 

 Coll. Irom INyasaland, in which the abdominal cross-bands 

 are rather weak and indefinite. The other is a very bright 

 and shining form, which might be taken as a subspecies. 

 It is a iitthi laiger, and the '• tiiangle '^ covering nearly all 

 the irons is very deep excessively shining blade instead of 

 being shining brown. 'J he abdominal markings are also 

 very clear and distinct ; they consist of the iollowing on the 

 Ttllow background : — 1st segn.ent with very shoit central 

 bar ; 2nd arched bar \\\i\\ the springings situated basally ; 

 3rd broad, only leaving narrow hind maigin yellow; 4th 

 median, oi half total breadth of segment; the pointed 5tli 

 has a narrow basal band. 



A specimen in Cam. Coll., Durban {F. M.). 



Ops nigra, sp. u. 



The whole of head and thorax entirely shining black, 

 except for tlie oi'ange antennae and bright yellow scutellum. 

 The vertical triangle does not cover the whole of the Irons, 

 but leaves eye-margins narrowly widening right from the 

 vertex. 



Wings quite normal, clear. 



