July, 1887.1 25 



Lecanium tessellatum. 



Lecanium tessellatum, Sign., Ess. Cochin., p. 231, pi. 11, fig. 4. 



? . Scale flat-convex, short hroad-oval, much widened posteriorly, a little nar- 

 rowed anteriorly, one side usually straighter than the other, or somewhat curved 

 inwardly, and sometimes with one or two slight incisions ; pale greenish-yellow, 

 covered with dark -lined irregular reticulation or tesselation, each mesh containing 

 numerous dark dots more or less in rows, the middle of the disc occupied by a long, 

 wide, irregular sided space. This is the immature form and is the L. tessellatum of 

 Signoret. In a still younger state the scale, although of full size, is flat, without 

 marking, colourless and transparent. The mature form, more convex than in the 

 immature, foveate-punctate ; along the middle of the back a broad, flattened, black 

 ridge, from which, on either side, the black colour extends downwards all round, 

 more or less suffusing two or three rows of meshes, and often forming a well-defined 

 blotch, but leaving a space of two rows of clear reticulation between it and the margin ; 

 within the bounds of the blotch four or five transverse furrows, the broad inter- 

 vening spaces flat, each having at its lower end a pale spot ; anal point above the 

 cleft yellow. Under-side, body anteriorly white, posteriorly black ; legs and an- 

 tennae pale, the latter of seven joints, the 3rd twice as long as the 4th, 6th and 7th 

 still longer. Length, 3"5, breadth, 3 mm. 



Young larvse under the mature scales. No (? scales seen. 



At p. 77, vol. xxiii, I have mentioned this species, then known to 

 me only by Signoret's description and figure, in comparison with L. 

 alienum, and I can now confirm the differences there stated. 



Received from Mr. Sowerhy, Royal Botanic Society's Gardens, on 

 Sapindus saponaria, and from Mr. J. O'Brien, Harrow, on the same 

 plant, in all stages of existence on a leaf. 



Lecanium angustatum. 



Lecanium angustatum, Sign., Ess. Cochin., p. 228, pi. 11, fig. 2. 



? . Scale clear yellow, elongate, narrow, flat (sometimes with a tendency to a 

 median blunt carina), smooth, shining, sides nearly straight and not recurved, both 

 ends rounded. Under-side all pale ; antennae of seven joints, 3rd and 4th longest ; 

 tibise canaliculate, the tarsi, when viewed obliquely, appear flattened and broader 

 than the tibiae. Eggs and larvse within the body. 



Length, 4'5 — 5, breadth, 2 mm. 



^Except as to the slight indication of a median keel this agrees 

 exactly with Signoret's description of L. angustatum, which was found 

 on Papyrus. My specimens came from leaves of Anthurium Scher- 

 zerianum, a native of Costa Rica, received from the Royal Botanic 

 Society's Gardens, Regent's Park, in January and February last. 



The Male of Lecanium uespeeidum. 



In the " Comptes rendus des Seances de I'Academie des Sciences " 

 (Paris), No. 7, Feb. 14, 1887, p. 449, is an article entitled " Les males 



