310 THE ZOOLOGIST. 



P. holsatus, except in its size, which is greater than that of P. marmoreus, 

 being If in. in length, and IJin. in breadth across the carapace, and in 

 the colour of the carapace, which is of a dull leaden hue all over, reheved 

 on the hepatic regions by two corresponding crescents of little white spots. 

 The specimen is a male, and is in excellent condition, and my conclusion 

 about it is that it is merely a largely developed specimen of P. marmoreus, 

 as Bell suggested P. holsatus might turn out to be. Its colour makes no 

 difference in my conclusion. It is well known that in many of our smaller 

 crabs the colour of the young is quite unlike the colour of the adult in the 

 same species. For instance, the little many-coloured Xanthos develop 

 into the well-known sluggish self-coloured reddish-brown crab. — Thomas 

 Cornish (Penzance). 



INSECTS. 



Wasp attacking a Tarantula.— My friend Mr. Samuel Bhgh, of 

 Catton, Coslanda, Ceylon, writes me as follows, under date of 22nd May, 

 1887 : — " On the 16th a Mason Wasp, of a large species common here, 

 was discovered dragging a large Tarantula across my garden-path; it had 

 evidently stung to numbness its huge and venomous prey, and was taking 

 it to its nest. The Wasp was killed ; the Spider is still alive, but com- 

 pletely paralysed ; it weighed three drachms, the Wasp only ten grains." 

 I think the above may be interesting to readers of ' The Zoologist.' — 

 J. H. GuENET (Northrepps Hall, Norwich). 



SCIENTIFIC SOCIETIES. 



Zoological Society of London. 



June 23, 1887.— Prof. W. H. Flower, LL.D., F.R.S., President, in 

 the chair. 



Mr. Sclater exhibited the skin of a White-nosed Monkey of the genus 

 Cercopithecus, lately living in the Society's Gardens, which appeared to be 

 the C. ascanias of Schlegel. It had been obtained by the Rev. W. C. 

 Willoughby from the west shore of Lake Tanganyika, East Africa. 



Mr. Sclater also exhibited and made remarks on a specimen of the 

 Pheasant from Northern Afghanistan lately described by him as Phasianus 

 principalis. 



An extract was read from a letter addressed to the Secretary by 

 Mr. A. H. Everett, of Labuan, reporting the return of Mr. John White- 

 head from his expedition to Kina-Balu Mountain in Northern Borneo, with 

 specimens of some fine new Birds, Mammals, and other objects of Natural 

 History. 



