October, 1887.] 97 



two trausverse carinse " (Ess. Cochin., p. 26S), and by tlie consideration 

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

 olece), G. pahnce quite agrees with cycadis. I subjoin Haworth's 

 description : — 



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

 fasciisque dualus elevatis tra7isversis. 



" Habitat in Palmse foliis Horto Chelseiano, copiose. Pestis inorbida, fceda. 



" Long Corp., 2 lin., lat., 1^." 



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 longulum, 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 each ant-enna. 

 Antennse 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 structure and the want of colour make it ini- 

 possible to determine with certainty whether or not 

 there is a real articulation (fig.). Young larvae 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 



