FOUR NEW SPECIES OF BELYTA. 301 



but I wish to point out that the abdomen is not 

 unfrequently entirely reddish. Out of a lar^e 

 number of specimens examined, I have not been 

 able to find a single male. It seems to me that 

 this is the same species as that called on the 

 Continent Heliothrips hcemorrhoidalis. 



As for the destruction of this pest, I would point 

 out that they are most readily killed in the larval 

 state, when they are easily destroyed by pulling the 

 leaf between the fingers with some pressure. This 

 is certainly the best plan with the more delicate 

 plants, such as the more fragile ferns, and if this 

 be done regularly it will not take long to sensibly 

 diminish the number of the insects. 



VII. A WHITE ABERRATION OF GAMMARUS PULEX. 



In a mountain tarn in Mull I found the common 

 fresh-water shrimp very common, but they differed 

 from all the specimens I have seen of this species 

 in being pure, almost transparent, white. Wliat 

 may be the cause of the whiteness I am unable to 

 explain. The lochan is very deep and stony all 

 round, except at one corner. The shrimj) was very 

 common, and all I saw were of the same colour. 

 The other inhabitants of the lochan were Dytiscus 

 lapponicus, some other arctic water-beetles, and 

 very large newts and entomostraca — fish of all 

 kinds being completely absent. 



VIII. ON FOUR NEW SPECIES OF BELYTA. 



The species of Behjta are very little understood, 

 and stand much in need of revision. The following 

 species (all from Scotland) are, so far as I can make 

 out, undescribed : 



Belyta lativentris, sp. nov. 



Black ; covered with longish pale hair ; the base and apex of 

 scape and joints 2-6, red ; legs piceous-red, the femora more or 

 less infuscated; the coxae black, except at apex. 



Antennae covered with microscopic pile; the 

 second joint is a little more than half the third, 



