328 Mr Brindley, The proportions of the sexes 
Total | Percen- 
Locality Year | 3 and | tage of 
? adults| males 
Round Island = aie 8 oy) | EST) 365p) liek 
55 i na ae woe | L912) | 2016 aa 
Sagan As ae Boo |) Se 172) lee 
St Agnes and Gugh . 2 ae ... | 19125) AGGs vanes 
St Helen’s ... 1912 120_| 3383 
St Mary’s; between Carn Morvel and Sienal 
Station 1912 587 | 39°9 
i between Porth Hele ayn Old 
Town ... ! 1912 368 | 40-0 
s total collections . hy woe | LOT 2S GLO ser, 
Porth Cressa__.... aoe wae | LOTS eS SOM bene 
Northwethel ie be as ae eer | One 206 | 42-7 
St Martin’s ... he ares ate, FP | SAO: 823 | 43:3 
St Mary’s; Newford Strand and Island... | 1912 655 | 45-2 
Rosevear , Be ms .. | 1913.) 2153 | 485 
Tresco; New Grimsby ae sits ... | 1912 | 1650 | 48-5 
3 total collections aoe ae ve] LOT 20209) 488 
Tean ... ats ate | el Oe 196 | 49-5 
Tresco ; Abbey Gardens 5de wal wat | O12 see On aac 
Pt = od a bog || Is) 356 | 50°6 
Bryher as “eh oo | LOL | L052 a iRoOen 
Tresco ; Abbey Gardens cnt ae | LOLS oa Onion 
It was pointed out in my previous paper* that the percentage 
of males from the same locality is found to vary for different 
years in collections made in the same months and large enough 
for reliance to be placed on the percentages. In some cases 
the variation is greater than might be expected, thus in collec- 
tions kindly made for me by Professor R. C. Punnett, at Bobbing, 
Kent, in 1903, 1904 and 1906 there was a range of 9:2. In Tresco 
Abbey Gardens, Scilly Isles, the male percentages for 1903, 1911, 
1912 and 1913 were 555+, 59:7, 50°3 and 50°6. This range is 
considerable, but in all cases the male percentage is above the 
average, and forms a striking contrast with 161 and 17-4 in the 
large collections made for me at Round Island by the light-keepers 
in two successive years. The collection from Porth Cressa in 
St Mary’s in 1913, 42:4, agrees closely with the average 42:0 of 
collections from three other localities in the same island in 1912. 
* Loe. cit. p. 677. 
+ Figure kindly furnished to me by Mr EH. J. Burgess Sopp from a small 
collection (146 adults) made in August, 1908. 
