October, 1887. J 97 



two transverse carlnje " (Ess. Cochin., p. 268), and by the consideration 

 that of the three species thus denominated {L. cycadis, testudo, and 

 olecd), C. paUnce quite agrees with cycadis. I subjoin Haworth's 

 description : — 



" PalruBB. Coccus testa rufo-fusca uniculore, ovali-convexa rugulosa linea dorsali 

 fasciisqite dualus elevatis transversis. 



" Habitat in Palmse foliis Horto Clieleeiano, copiose. Pestis morbida, foeda. 



" Long Corp., 2 lin., lat., H." 



Haworth gives as a doubtful synonym, " Coccus aonidum, Gmel., 

 Syst. Nat., 2215, 2 ?" but the description is only that of Linne (which 

 is not referred to) transposed, with one or two interpolations, and 

 does not at all agree with that of Haworth ; for instance, it has 

 "Testa orbiculata, planiuscula, atro-purpurascente : centro s. vertice 

 tuberculato, rotundo, rubro, in senescentibus aperto." This points to 

 an Aspidiotid, not to a Lecanid, and Targioni and Signoret have so 

 adopted Coccus aonidum, Linn., as the type of Aonidia, a new genus of 

 Diaspina. 



Lecanium lonqulum, n. sp. 

 ? scale dingy pale yellowish-grey, elongate, narrow, ends broadly rounded, side 

 margins slightly curved out, not recurved ; surface smooth, transversely arched, 

 1 ngitudinally level semi-cylindric, not carinate, a band 

 of faintly dark reticulation along the sides, whence, in 

 some examples, faint dark lines radiate to the margin ; 

 the disc occupied with a long, pale, clear, oval spot ; or 

 in some mature specimens the scale is unicolorous yellow- 

 brown, the dorsal pale spot partly or wholly covered 

 and on the sides minute pale dots in place of reticulation. 

 Under-side all pale, a broad space all round the insect, 

 a conspicuous blackish eye-spot above eacli antenna. 

 Antenna; of eight joints ? : the Ist short ; the 2nd longer, 

 about the same length as the 4th ; the 3rd longest of all ; 

 the 5th longer than the 4th, but not so long as the 3rd ; 

 the 6th, 7th and 8th shortest, the 8th longest of the 

 three, which (especially the terminal) have all gradated 

 sides. The 8th, indeed, simulates two joints, but the 

 gradated structui-e and the want of colour make it ini- 

 possible to determine with certainty whetlier or not 

 there is a real articulation (fig-). Young larvro under 

 the scales. Length, 4—5, breadth 2—2-25 mm. 



No male scales seen. 

 A scale remarkable for its length, narrowness, and semi-cylindric 



form. 



On stems (rarely on the leaves) of Acacia catechu, from Mr. James 

 O'Brien, Harrow ; on the same plant, Anona muricata and Myrica 



