530 Miss G. E. Webb on some 



species, which was established by Ricardo for specimens from 

 Queensland and Victoria. The lange of the species — the 

 specimens in our collection came from Northanl — is thus very- 

 wide, extending completely across the Australian continent. 

 The specimens, which include male and female examples, do 

 not differ from those described for the Eastern States. The 

 size is markedly different from that of Blepharotes coriarius, 

 Wiedemann, being smaller — our specimens of B. coriarius 

 are 40 mm., whilst B.flavus is ^ 30 mm. and ? 30-34 mm. 

 Ricardo states also that B.flavus is smaller than the species 

 B. coriarius, but the dimensions given in her paper are just 

 the opposite — B. coriarius, (^ 27 mm. ; B. flavus, <? 30, 

 ? 35 mm. This must be a mistake, and, as the difference 

 in size is considerable and of some importance, it is men- 

 tioned here. 



Literature. 



RiCAHDo. " A Revision of the Asilidae of Australasia." Ann. & Mag. 



Nat. Hist. ser. 8, vols, ix., x., & xi. 1912 & 1913. 

 White. " New Australian Asilidse." Proc. Roy. Soc. Tasmania. 



1913-15. 

 Walker. ' Insecta Saundersiana. — Diptera.' London, 1856. 

 LoEW. " Ueber die europaischen Raubfliegen (Diptera asilica)." Linna^a 



entomologica. Berlin, 1849. 



EXPLANATION OF PLATE XV. 



Fi(/.\. Phelltis glaucus. 



Fig. 2. Phellus piliferus, sp. n. 



Fig. 3. Questopogon clarkii, gen. et sp. u. 



Fig. 4. Machinius forrestii, sp. n. 



LIII. — Note on some Young Stages of Gecarcoidea lalandii, 

 Milne-Edwards. By Gladys E. Webb, M.iSc, Assistant 

 in Zoology Department, University College, London. 



Gecarcoidea lalandii, M.-Edw.j is the common Red Crab 

 of Ciiristmas Island. It is mentioned (under the name of 

 Gecarcitms lagostomus) by Dr. C. W. Andrews in the 

 'Monograph of Christmas Island' (1900), where its annual 

 migration to the sea for the purpose of hatching off its eggs 

 is also described. 



The following account of the collection of young stages 

 believed to belong to this species is given by Dr. W. T. 

 Caiman (Proc. Zool. Soc. J 909, p. 710) :— " On his 



