1804.] 233 



adult $ of Leucaspis pini, Hartig, wbicb, after treatment with potash, 

 still retains the marginal fringe of blunt spines, which is so charac- 

 teristic of the genus. 



Mr. Morgan, in his description {I. c), says, "the posterior margin 

 of the female adult, unlike most species of Diaspina, is entire, possess- 

 ing neither plates nor lobes." In this my new species does not agree, 

 all have the very small plates, but they vary exceedingly in number, 

 scarcely two being alike. It is, therefore, quite possible that some 

 have none at all. The rest of his description agrees so well, that I 

 feel almost certain of the identity, and Herr Sulc is of the same 

 opinion. 



EXPLANATION OF THE FIGURES. 



1 and 2 after 8ulo, types coll. Newstead. 



8 „ type coll. Sulc ; this is a very curious form, having three odd 



lobes grouped together on one side. 



Lecanium perfoeatum, n. sp. 



? adult (fig. 1, as seen with transmitted light), viviparous ; dark pioeouS; 

 margins paler ; extremely flat, short-ovate, generally much widened posteriorly ; on 



either side of dorsum are well defined, radiating, 

 transverse carinse ; the spaces between finely rugose. 

 Dermis tessellated with irregular rows of tesserae ; 

 four on either side of dorsum ; margins of each 

 tessera with very minute pores, which, under a low 

 power, look very like perforations (fig. 2) ; posterior 

 half of submarginal row with large, clear, jagged 

 spaces (fig. 2) ; about five on either side of dorsum ; 

 marginal row finely granulated outwardly. Antennae 

 (fig. 3) of eight joints ; 2nd, 3rd, 4th and 8th longest, 

 FigTT*^ Pig. 2 Fig 3 1^^, 5th, 6th and 7th shortest, and in length nearly 

 equal ; 8th generally the longest. Legs rather short ; intermediate and posterior pair 

 wide apart ; tarsi much shorter than the tibiae ; trochanter with a rather short 

 hair ; digitules to tarsi ordinary, those of the claw much dilated at the extremity ; 

 claw short. Rostral filaments unexpanded, about the same length as the legs. Anal 

 cleft very deep; lobes very small. Long, 3"50 — 4 mm. ; wide, 2"50 — 3 mm. 



? , prior to gestation, dull reddish-brown ; younger forms much lighter. Larva 

 dull reddish ; antennae of six joints, of which the 3rd and 6th are longest ; 3rd 

 longest, 4th and 5th equal, about same length as 1st and 2nd. Rostral filaments 

 unexpanded, extending beyond tibite of posterior legs. Legs rather short ; digitules 

 to tarsi and claws ordinary. Anal setoe rather shorter than is usual in the genus. 

 Margins with a few stout hairs ; and there are four very stout blunt spines, one over 

 each of the tracheae. 



Hub. : Palm House, Kew ; very numerous on the under-side of 

 the Icavca of Garyotu Oumitu/ii, a tropical palm. August, iHO-i. 



