30 KOBERT NEWSTEAD. 



On maceration in KOH the integument is thin and transparent, with the exception 

 of a small portion surrounding the minute caudal process. In very young females 

 the test is ovate, opaque and glassy, with a very elongated plate of buff-yellow 

 secretion, the posterior end of which rests against the naked caudal process. Stig- 

 ma tic processes pure white and projecting beyond the margin. 



Southern Nigeria : Ibadan, on cacao and "ona large climber on bush tree " 

 (Dr. W. A. Lmnborn). 



The tests of the old adults bear some resemblance to those of Ceroplastes coniformis, 

 Newst. , but are markedly distinct. There is a striking, indeed a remarkable, difference 

 between the young and old examples, but their structural details are specifically 

 identical. 



Ceroplastes subdenudatus, sp. nov. 



Female test. Incomplete, covering only the central portion of the dorsum of the $ ; 

 this is more or less bluntly conical, the apex with an irregularly pointed patch of dull 

 white wax, sometimes faintly stained with yellow or yellowish brown, with a central 

 nuclear spot ; the rest of the body of the $ with a thin transparent coating of varnish- 

 like secretion ; stigmatic processes white, thread-like and curly, resting upon the sides 

 of the $. Greatest diameter, 2 "5-3 4 ; height, 2 "3-3 '6 mm. 



Female, adult. Somewhat hemispherical, but the height is slightly greater than the 

 diameter at the base, the latter circular in outline. Cephalic lobe and stigmatic clefts 

 rudimentary. Caudal process rudimentary and placed, as a rule, just above the 

 middle line between the margin and the centre of the dorsum. Surface shining, 

 faintly wrinkled at the sides. Antennae relatively small, of seven segments ; 4th 

 much the longest ; formula, 4, 2, 3, 7, 1 (5, 6), or the 7th may equal the 3rd ; long 

 stout spines on the last three segments. Stigmatic spines of two types ; those at the 

 margin stout and pointed, forming a group of 15-16 ; the inner group obconical and 

 numbering 19-22. Marginal spines similar to the pointed ones in the stigmatic 

 clefts ; very few at the sides, but they are placed closely together on the cephalic 

 margin. Postanal arch of chitin with a well-marked series of circular pores. 



Two specimens gave the following measurements : (1) diameter, 2*4 ; height, 3*3 ; 

 (2) diameter, 3*2 ; height, 3*5 mm. 



Uganda : Entebbe, on Acacia sp., 7.iv.l4 (C. C. Gowdey). 



Easily distinguished by the apical patch of white wax and the unusually long 4th 

 segment of the antennae. 



Ceroplastes vuilleti, Marchal.* 



Pwparium of male. Elongate. Colour of the dorsal half somewhat like that of 

 dirty beeswax, with seven relatively large protuberances partly covered with dirty 

 white, granular wax ; one anterior, three bilateral and one central. Lower half 

 shaped like a shallow boat ; posterior extremity often tilted upwards, with a narrow 

 transverse slit between the dorsal and ventral portions. Inner surface dirty grey. 

 Length, 1*4-1 *5 mm. ; width, 0*7-0 "8 mm. 



*Bull. Soc. Zool. France, 1909, p. 68; Mem. Soc. Zool. France, xxii, p. 165 (1909). 



