114 Mr. E. E. Austen on a 



Davisia cobbi, sp. n. (Figs. 9, 10.) 



Shell suborbicular, white, irregularly concentrically striate ; 

 umbones large, prominent ; dorsal margin sloping on both 

 sides; ventral margin gently rounded; both anterior a'id 

 posterior sides sloping abruptly ; cardinal tooth in right valve 

 small, slightly curved ; anterior lateral slightly elongate, 

 weak ; posterior lateral rather broadly expanded ; cardinal 

 tooth in left valve obsolete ; anterior lateral expanded, 

 curved below ; posterior lateral rather broad, elongate, 

 straight ; interior of shell pure white, shining. 



Long. 2*5, lat. 2 # 25 mm. 



Hab. Falkland Islands. 



The proper position of this and the preceding genus would 

 appear to be in the family of the Erycinidce. 



Psephis foveolata, sp. n. (Fig. 11.) 



Shell small, broadly subtrigonal, smooth, polished, shining, 

 anteriorly pale flesh-colour, shading to livid purple poste- 

 riorly ; umbones large, prominent ; dorsal margin sloping on 

 both sides ; ventral margin rather straight ; anterior side 

 produced, rounded ; posterior side still more produced, some- 

 what truncate ; interior of shell shining, showing the external 

 coloration through the shell. 



Long. 3'5, lat. 5 mm. 



Hab. Falkland Islands. 



EXPLANATION OF PLATE IV. 



Fig. 1. Limncea brunneqflavida, sp. n. 



Fig. 2. Chilina falklandica, sp. n. 



Fig. 3. Photinula solidula, sp. n. 



Fig. 4. Modiolarca gemma, sp. n. 



Fig. 5. picturata, sp. n. 



Fig. 6. Cyamium iridescens, sp. a. 



Fig. 7. Hinge of Malvinasia arthuri, sp. n. 



Fig. 8. Malvinasia arthuri, sp. n. 



Fig. 9. Hinge of Davisia cobbi, sp. n. 



Fig. 10. Davisia cobbi, sp. n. 



Fig. 11. Psephis foveolata, sp. n. 



XV. — A new Indian Species of Musca. 



By Ernest E. Austen. 



(Published by permission of the Trustees of the British Museum.) 



Among some Indian Muscidae recently received for identi- 

 fication from Captain W. S. Patton, M.B., I. M.S., Assistant 

 Director of the King Institute of Preventive Medicine, 



