Notes on Chiroceplialus diaphanus and Arternia salina. 



1^51 



In tlie English Meclianic of March S, 1912, it was recorded as 

 liaving been found in 1900 in a pond near Lymington, and found 

 in the same pond on some subsequent occasions. 



A very careful search made over the whole of that district by 

 Mr. A. J. Eainer w^is quite unsuccessful ; but after persistent 

 searching in other localities he came across Chirocrphalus in a small 

 pool of water, some two or three miles from Christchurch, and 

 brought me many specimens. Shortly after he found it in three 

 other small pools of water near the first one, and still later in a 

 fifth pool, distant some three-quarters of a mile. As all these 

 pools were within a mile and a half, it is reasonable to suppose that 

 under certain conditions they could be in communication. A little 

 later he found it in a pool more distant, and still later in three 

 other pools, distant some two miles from the former ones. 



Mr. Eainer has kindly furnished me with his records, which I 

 think are of sufficient interest to be mentioned here. For the sake 

 of convenience I have numbered the pools one to nine. 



August 8, 1912. Pond Xo. 1, near Hawthorn farm. Chiro- 

 cephahis first found ; adult males and females. 



August 25. Pond No. 1. Numbers diminished, but many 

 females with ova. 



August 31. Pond No. 1. Adult males and females plentiful. 



Sept. 8. Pond No. 1 nearly dried up ; Chirocephahts crowded 

 in very small quantity of water. 



Sept. 15. Pond No. 1 quite dried up. Found Chirocejjhcdus 

 in two pools (Nos. 2 and 3), close together, and also in another 

 pond, No. 4, about ^ mile distant. 



Sept. 28. Obtained adult Chirocephahis, males and females 

 with ova, for Natural History Museum, South Kensington, froir. 

 pond No. 4, which had very little water. 



Oct. 5. Pond No. 1, which had become refilled from rain, full 

 of larvae. 



Oct. 12. A few found in pond No. 4. 



Oct. 19. Pond No. 1. Again nearly dry ; very few larva^. 



Oct. 22. No Chirocephalus found in any of the ponds. 



Nov. 10. Pond No. 1. Again full of water and many larvae. 



Nov. 16. Ponds Nos. 2, 3, 4. Full of larvae ; and two fresh 

 ponds (Nos. 5 and 6) in the neighbourhood, also full of larvae. 



Nov. 24. Ponds Nos. 1, 2, 3. All contained advanced larvae. 



Dec. 22. Larvae found in three fresh ponds (Nos. 7, 8, 9) some 

 distance away, and adult Chiroreplialus in ponds Nos. 2 and 3. 



Jan. 19, 1913. District flooded. Ponds Nos. 1, 2, 3 obliter- 

 ated. Ponds Nos. 6 and 7 full of adults. Pond No 8, few adults, 

 but of considerable size. 



Such a record, I think, is unique. 



I am particularly pleased to bring the name of Mr. Eainer, 

 •who is a most painstaking collector in other directions, before the 



