102 ROBERT NEWSTEAD — OBSERVATIONS ON 



Anal ring with ten long stout hairs. There are 3-5 short spines of varying 

 lengths at the margins of the anal cleft ; but there are none at the margins of 

 the body ; there is, moreover, no trace of any stigmatic clefts or of the spines 

 which usually accompany these structures. Derm, immediately opposite the base 

 of the anal bilobed plate, with several spinose hairs, some of which are very 

 long or equal in length to the longest axis of the plate. There are usually five 

 cribriform circular plates arranged in two longitudinal and slightly divergent 

 series. Length, 3.50-4 mm. 



Female, young adult. — Dusky red-brown, brown or smoky brown, generally 

 protected by a thin coating of grey or ochreous and somewhat granular secretion. 

 Rather elongate and shaped somewhat like a Lecanium ; dorsum with a very 

 pronoimced keel, at the base of which is a regular series of short transverse 

 ridges, interrupted in the centre by a deep longitudinal groove. What the insect 

 is like in life it is not possible to say ; but it is quite evident that the transverse 

 ridges which are so clearly indicated in the dried examples correspond with those 

 found in the tests or ovisacs of the old adult females. 



Male pupariurn. — Ochreous buff or pale straw-coloured, rarely creamy white ; 

 form normal ; transverse segmentation or ridges generally distinct. Length, 

 1.50-2 mm. 



On Acacia arabica ; Ezbet el Nakhl, Egypt, November, 1909 {F. C. Willcocks) ; 

 and on the same kind of tree in Upper Egypt, above Aswan, July, 1909 

 {F. Huc/hes); also on Ficus sp., near Cairo, summer, 1909 {F. C. JVillcocks). 



Lecaniodiaspis mimosae (Maskell) is, as far as I can gather, the only other 

 African representative of the genus. This species was considered by Maskell* 

 as only a variety of his L. prospndidis. Cockerell,t however, raised mimosae to 

 specific rank, though he has not, to the best of my knowledge, stated his reasons 

 for doing so. Recently I had thought that L. africana might be specifically 

 identical with Maskell's mimosae ; but Maskell (Joe. cit.) distinctly states that the 

 " feet " are absent in his L. prospodidis, and that as far as he could see " there is 

 nothing but size and colour " to distinguish his var. mimoscB from it. I have 

 come to the conclusion, therefore, that as L. africana possesses relatively well 

 developed legs it cannot be referable to either of Maskell's species. 



Tachardia longisetosa, sp. n. 



Test of adult female. — Smoky ochreous buff to dusky amber-yellow. Isolated 

 examples are distinctly hemispherical in form, with strong and somewhat wavy 

 ridges radiating from the dorsum. Central orifice distinct and surrounded by a 

 dull crimson area. Diameter, 3-5 mm. 



Female, adult. — Ovoid in outline, after maceration in potash. Antennas absent. 

 " Lac tubes " very short and much more transparent than in T. decorella, Mask. ; 

 sub-central group of pores compact ; outside the central compound group are 

 several (17-20) circular pores irregularly scattered over the broader portion of 

 the structure ; surface evidently reticulated. Anal spine distinctly funnel-shaped. 

 Anal process prominent ; anal ring with ten very long hairs jjrojecting con- 

 siderably beyond the pointed dorsal process (? modified anal lobes) ; the latter 



* Trans. N. Zealand Inst., 1896, p. 316. 

 •j- Check List, Supp. p. 392 (1899). 



