NOTES ON THE GENUS METROCORIS. 61 



brown between tbis and tbetermen. A ratber conspicuous dark mark 

 at tbe origin of veins 3 and 4. Hind wings normal or ratber pale. 

 Occurs on Capri in autumn, apparently supplanting tbe type. 



Type (?) in coll. L. B. Prout. Paratypes ( t? 2) in coll. 

 C. S. Browne et Brit. Mus. 



NOTES ON THE GENUS METROCORIS (RHYNCHOTA). 

 By G. W. Kirkaldy. 



A BioNOGRAPHic revisioH of tbis genus and its immediate 

 allies has, owing to a variety of causes, been shelved for some 

 time, and is likely to remain so for a little longer. I hasten 

 therefore to describe now a new species which was placed in my 

 hands for study by Mr. Distant, and was returned to him a long 

 time ago with a manuscript name attached. 



Although it would not be profitable at the present moment 

 to discuss any of the other species at any length, each of these 

 is enumerated. 



The generic synonymy is detailed in Lethierry and Severin's 

 * Catalogue des Hemijjteres-Heteropteres,' vol. iii. p. 64, and need 

 not be copied here. M. lituratiis, Stal, appears to be marine, but 

 the record requires confirmation ; it may Avell be so, however, as 

 Rhagovelia, Mayr, contains a few estuarine or semi-marine 

 forms, the majority being tiuviatile or paludicolous. The other 

 four species of Metrocoris are frequenters of fresh water. 



Tables for the determination of the Species. 

 Males : 



1. Anterior femora strongly incrassate, with tubercles 2. 

 la. Anterior femora not, or not strongly, incrassate, with- 

 out tubercles beneath . . 3. compar (F. B. White). 



2. Dark, with pale markings ; one tubercle . 5. stall (Dohrn). 

 2a. Pale, with dark markings ; two tubercles . 1. lituratiis (Stal). 



Males of histrio and distanti unknown. 



Females : 



1. Ground colour pale flavous, with black markings (only 



apterous forms known) ...... 2. 



la. Ground colour black, with pale markings . . .3. 



2. Medio-longitudinal black line on tbe thorax reaching 



to tbe abdomen ; abdomen truncate apically beneath. 

 China : Wampoa, Hongkong . . 1. lituratiis (Stal). 



2a. Same line on thorax not reaching abdomen, which is 

 apically angular (almost rounded beneath). Japan 



2. histrio (White). 



