130 



cespitis, and L. testacea from Co. Cork ; very dark Hipparchia seniele 

 and Aphantopns hi/perantits, with permanent spots on upperside and 

 underside of a greenish shade, both from Killarney ; and JErieria 

 scoUirforiuis, captured at Killarney. In Co. Clare many species 

 turned up in small numbers, among them Triplmna sitbsegua, bred 

 fromlarvce, Maiiiestra conti{/ita, Stilbia anoiiiala, yellowish, Spilosdma 

 mentliastri, Leptoaia suiapis, Ciipido minitiius, etc. Larvte collecting 

 in Cork produced Dianthcccia capwphila, D. lutea/jo var. barrettii, 

 Ciicullia absynthii, Hipocrita jacobaa', MacrotJn/lacia rubi, etc. 

 Aglais Hvtica var. polaria were bred from larvae from Cork. The 

 weather from April to the end of September (the time spent in 

 Ireland) proved very bad, wind and rain prevailing nearly all the 

 time, with few really fine days till September. Lepidoptera were 

 very scarce, and the natives even remarked how few butterflies were 

 about compared with other years. 



Mr. A. E. Tonge exhibited the fungus, Clavaria inarjualis from 

 Tunbridge Wells, and a male specimen of Anjiinnis aijlaia with 

 confluent spots forming a conspicuous blotch on the forewings. 



NOVEMBER 13th, 1913. 



Prof. W. Bateson, F.R.S., gave an address on the " Problem of 

 Species which overlap Geographically," illustrating his remarks 

 with numerous specimens and lantern slides. 



Birds of the genus Colaptes were exhibited from North America. 

 One form inhabits the north and eastern area, another the west 

 and southern area, leaving a narrow area between in which a large 

 proportion of crosses of these t\\o forms of many degrees were 

 obtainable. The peculiar distribution of the sugar-birds in the 

 West Indies was another instance, and similar examples of this 

 peculiar overlapping of distribution in the cases of Ariij/uius adippc, 

 AniynnU niobe, the North American species of Limenitis, the Coracyas, 

 or roller-bird of N.E. India, Pararye eaeria and var. eyerides, 

 Pieria napi, etc. Attention was called to the fact that it was very 

 rare to find a definite recurrent form arise in the area of the over- 

 lap, and the results of the crossing of the forms were of all degrees 

 of intermediate blending of characters. The question to be discussed 

 was : What keeps geographical forms, in apparently similar areas, 

 apart ? 



A considerable discussion took place. 



Mr. Newman exhibited long and very varied series of Zonosoma 

 annnlata [omicronaria) and of Z. pendidaria, including many dark 



