188 [August, 



edge. But he now desired to withdraw his earlier hypothesis in favour of the more 

 probable and convincing suggestion made by Mr. Grove. Professor Poulton also 

 showed a photograph of the fungus-like marks on the wings of the Oriental Kalli- 

 mas, prepared under his direction by Mr. Alfred Robinson of the Oxford University 

 Museum. Dr. Karl Jordan communicated a note upon the Variability of the 

 Genitalia in hepido-ptera. Dr. G. B. LongstaiJ detailed his observations on scents 

 in the male of Qonepteryx, and mentioned that whereas in the male O cleopatra, 

 the odour was strong, he had been unable to detect any appreciable fragrance in 

 &. rkamni. Such a difference, he said, seemed to imply a physiological difference 

 between the two forms pointing to specific distinction. Dr. F. A. Dixey, in con- 

 nection with Dr. Longstaff's observations, exhibited the several forms of Gonepteryx 

 occurring in the Palaearctic region, and demonstrated the variation of wing colora- 

 tion in the respective fcrms ranked as species. Mr. H. J. Elwes read a note on the 

 Geographical Affinities of Japanese Butterflies, of which he also exhibited numerous 

 specimens taken by himself. Summing up his remarks, he said that during the 

 winter and spring months the plants and insects of Japan were, like the climate, 

 Palaearctic in character, yet during the summer and autumn th«y were tropical. 

 Professor Christopher Aurivillius communicated a paper on " New African Z/a.«/'o- 

 campidse in the British Museum." Mr. G W. Kirkaldy communicated a " Memoir 

 on the Bhynchota taken by Dr. Willey chiefly in Birara and Lifu." — H. Rowland- 

 Bbown, Hon. Secretary. 



LIST OF BRITISH DOLICSOPODIDM, WITH TABLES AND NOTES. 



BY G. H. VERBALL, F.E.S. 



{Continued from page 17-). 



26. MEDETERUS Fisch. 

 Small grey or greenish-grey flies, which sit iu a very upright 

 fashion on walls, tree-trunks, stones, &c., and which can run in any 

 direction without turning round. 

 . 1 (2) Scutellum with only two bristles 1. micaceus Jjw. 



2 (1) Scutellum with four bristles. 



3 (4) Middle tibiae with no bristle near base 2. rwMraZ/.s Meig. 



4 (3) Middle tibiae with a bristle near base. 



5 (12) Acrostichal bristles fairly large and distinct. 



6 (11) Last portion of postical (fifth) vein longer than discal cross- vein ; smallish 



species. 



7 (8) Knob of halteres darkened (at least above) 3. tristis Zett. 



8 (7) Knob of halteres clear pale yellow. 



9 (10) Middle sized species with dark legs; all bristles on thorax black... 



4. apivalis Zett. 



10 (9) Small species with palish legs ; some of the small bristles on thorax pale 



in certain lights 5. pallipes Zett. 



1 1 (6) Last portion of postical (fifth) vein not longer than discal cross-vein ; 



large species ; antennae reddish at base 6. obscurus Zett. 



