﻿SOME BEES FROM FORMOSA. \) 



wick concerning a swampy area in the grounds of his estate 

 at Easton, near Dunmow, in Essex, the wish was expressed that 

 this marshy bit could be " naturahzed " as far as possible, both 

 with respect to insects and plants. With the concurrence of 

 Lord and Lady Warwick I determined to try and introduce 

 P. machaon. Large supplies of the food-plants were procured 

 and planted round the swamp, and in the spring Lord Warwick 

 and I attached six dozen chrysalids of the butterfly to various 

 posts and walls of summer-houses round about. All the butter- 

 flies emerged in due course, and were seen from time to time 

 sailing away, but no larvas were found on the food-plants that 

 season, nor have they been found at Easton since; neither has 

 the butterfly been seen in the grounds. So far the experiment 

 was a failure, and I believe that others who have attempted to 

 introduce this butterfly into new districts have had similar 

 experiences. But there is a lurking suspicion that these 

 "escapes " from Easton may have founded a successful colony, 

 or successful colonies, elsewhere, and that the recently captured 

 specimens may have spread therefrom. Bishop's Stortford is 

 only about eight miles in a bee line from Easton, and Kelvedon 

 cannot be very much further. Enfield is the farthest point from 

 the centre of distribution. It will be interesting to note what 

 happens next season. Of course, it is too much to hope that any 

 specimens seen at large should be simply recorded and not 

 slaughtered. With strange butterflies, as with rare birds, the 

 tendency is to "kill at sight." Had we been successful with the 

 Easton experiment, it is needless to say that no " collecting " of 

 this butterfly would have been permitted. 



6, Bruuswick Square, W.C. : Dec. 14tb, 1911. 



SOME BEES FKOM FOEMOSA.— IL 



By T. D. a. Cockerell. 



The genus Nomia is represented in the Sauter Collection by 

 six species, but three others {N. takauensis, N. mirabilis, and 

 N. plamventris) were earlier collected by Sauter and have recently 

 been described, from males only, by Friese. According to the 

 material before me, two species appear to be exceedingly abundant, 

 and these are the species which also occur on the Asiatic main- 

 land. The others, apparently endemic, are represented by few 

 specimens. 



Group A. (Subg. Hoplonomia, Ashmead). 

 Postscutellum with two large teeth. 



Nomia 2)itnctidataf Dalla Torre, var. a. 

 Forty-six specimens, all males. The wings are dusky, and 



