1888.] 57 



only figures the upper-side, I do not see that this distinction would 

 hold, and I find that our palest specimens have practically no central 

 spots on the under-sides, but that these spots which are absent in the 

 pale forms gradually increase in intensity with the depth of colour on 

 the upper surface. He also gives different dates for the appearance 

 of his arundineta ; but Mr. Warren (Ent. Mo. Mag., vol. xxii, p. 256) 

 shows that neurica in Norfolk is a fortnight earlier than the same 

 species in Cambridge. I believe the dark form {dissoluta) used to 

 occur in the Norfolk and Cambridge Fens, but Dr. Staudinger himself 

 groups arundineta, Schmidt, with dissoluta, Treitschke, and our species 

 now gives us both neurica, Hb., and arundineta, Schmidt. 



There can be no doubt, therefore, that the synonymy should 

 stand : — 



Nonagria neurica, Hb., Sta. 



(a) var. dissoluta, Treitschke. 



(b) var. arundineta, Schmidt. 



Westcombe Park, S.E. : 



June 10th, 1888. 



NOTES ON SOME BEITISH AND EXOTIC COCCIDM (No. 9). 

 BY J. W. DOUGLAS, P.E.S. 



Lecaktum LATJRI. 



Coccus lauri, Boisd., Ent. Hort., p. 353 (1867). Lecanium lauri, Sign., Ess. Cochen., 

 p. 230 (1873). 

 $ . Long broad -ov.>te, or when alongside the midrib of a leaf, nearly straight 

 on the side appressed to it, flattened, yellowish-brown ; the middle portion of the 

 disc, that is, over the insect beneath, with a median, blunt, slight elevation, of varying 

 development ; on each side of this, for some distance, the surface is deeply and 

 coarsely punctured, the foveate punctures on their base, under the power of a half- 

 inch objective, appear as large black perforations of the integument, but there is no 

 reticulation or tesselation ; exterior to this portion the wide field, up to the margin 

 all round, is finely rayed transversely, and anteriorly has also on each side two 

 distant, fine, yellow carinas going obliquely from the punctured portion to the margin, 

 these become more or less obsolete in the old examples, but then the median elevation 

 mostly becomes sharper and more like a carina. Under-side glossy, greenish-yellow 

 with brown shades, usually more decided on the sides of the abdomen. Antenna? 

 slender, of 7 joints. Length, 35 — 3-8, breadth, 2 - 5 — 26 mm. 



No male scales seen. 



Signoret (/. c.) appears to doubt if this form be separable from 

 L. Tiesperidum ; and this is true as regards the young stage, where the 

 likeness of one to the other is very great ; but in the adult the broader 

 form, the strong puncturing of the disc, and generally darker colour, 

 seem to me to be of distinct specific value ; moreover, while L. hespe- 



