1917.] 207 



shininii', witli one or two small gi-oiips of impressed spots on eacli side of the 

 luesothoracic area. 



Dimensions of three living- examples, in millimetres: — 3 x 2-9 x 2-5, 

 o-25x-}X-'5, 4x3'75x2-o (the third measurement, in each case, representing 

 the height of tlie insect). 



Antenna (fig. 3,/) 6-jointed ; the 3rd joint longest, almost equalling the 

 lengtli uf the terminal three joints together; 6th joint next longest, but not 

 greatly exceeding the 4th or 5th, which are suhequal. The mouth-parts, 

 owing to collapse of the ventral tissues after oviposition, are placed on the 

 summit of an elongate rostrum (tig. 3, e). Limbs comparatively small, the an- 

 terior pair smaller and relatively stouter than the other two ; in the mid leg 

 (lig. 3, c) the pro::imal end of the tibia is rather conspicuously swollen, and the 

 tarsus is slightly more than three-quarters the length of the tibia. Claw long 

 and falcate ; digitules slender, the unguals stouter than the tarsals, slightly 

 dilated at extremity. Valves of anal operculum (fig. 3, d) roughly triangular, 

 the base shorter than the inner and outer edges, the inner edge strongly 

 isinuous. Margin with slender, acutely pointed spines, spaced at distances of 

 from two to three times their own length (see fig. 3, ff). Stigmatic areas 

 rather sharply indented ; stigmatic spines indistinguishable from those of the 

 general margin. Spiracles with broadly dilated exterior orifice. Derm with- 

 out cons])icuoua cells, except on the marginal area where there are scattered 

 oval paler areoles. The derm immediately surrounding the anal orifice and 

 extending for some distance on each side of the anal cleft is more densely 

 chitinous and thrown into folds, which form a delicate tracery of sinuous lines^ 

 suggestive of the pattern of a human finger-print. 



It should be noted that the description of the structural parts is. 

 drawn up from a preparation of a single example, and may possibly 

 require modification when more abundant material is available. 



On Birch {Betu/a alba); Camberley : June 1917. The species 

 appears to be extremely scarce, many hours of diligent search having 

 resulted in the discovery of four examples only, which were, in each 

 case, completely isolated on separate trees. Three of them were found 

 on the lateral branches of sapling trees, and the fourth on a small 

 branch of an older tree. Young larvae commenced to appear on 

 June 23rd. 



Lecanopsis longicornis Green. 



This species was described from three examples taken in 1915. In 

 the following year (July 1916) the insect was found in comparative 

 abundance, upon Oarex ovalis, in damjD meadows on the outskirts of 

 Camberley. In its later developnent it constructs a cylindrical white 

 ovisac, which readily becomes detached from its support and falls to tlie 

 ground, where it is protected by the surrounding herbage. Young larvae 

 were emerging from the ovisacs on July 18th. 



