OBSERVATIONS ON SCALE-INSECTS (COCCIDAE) — IV. 



23 



Female, adult. Tilted and shrivelled at gestation ; after treatment in KOII 

 broadly ovate. Colour pale brown. Antennae (fig. 15, a, a) usually of eight segments, 

 rarely of seven ; in the former case, the 4th is shorter than the 5th, and the 3rd the 

 longest ; in the example with seven segments the 4th, 5th and 6th are equal, the 

 3rd and the 6th are also of equal length and the longest. Legs very robust ; lower 

 digitules stout and strongly dilated. Stigmatic clefts (fig. 15, 6) barely indicated ; 

 spines three, the laterals about half the length of the central one and much the 

 stoutest. Marginal spines (fig. 15, b) long and for the most part faintly frayed 

 distally ; those at the anal margin slightly the longest ; they are somewhat irregularly 

 arranged and in places are two deep. Anal cleft about two and one-fourth times 

 as long as the lobes ; the latter (fig. 15, c) somewhat variable, with one apical and 

 generally two subapical bristles. Derm glands scarcely traceable, even in well 

 stained specimens, and then only in one or two places as small and approximately 

 oval spots. Length, 1*5-2 mm. ; width, 0"95-l*5. 



Uganda: Entebbe, on roots of Chrysanthemum, lO.iii. 14 (C. C. Gowdey). 



Pulvinaria africana, sp. nov. 



Female, adult. — More or less ovate, narrowed anteriorly. Colour (in formol) dull 

 amber-yellow ; surface of many individuals with a faint black network formed by 

 the mycelium of a fungus. Ovisac closely felted, elongate, with the sides more or 

 less parallel, straight or curved ; surface usually with four well-defined, rounded, 

 longitudinal keels, and transverse conchoidal wrinkles. Antennae (fig. 16, a) normally 



Fig. 16. Pulvinaria africana, Newst., sp. n., $ ; 

 a, antenna ; b, anal lobes ; c, stigmatic cleft and spines. 



of eight segments, of which the 3rd is slightly the longest; formula : 3 (2, 8) 1, 

 (4, 5) (6, 7) ; in one example the antennae are asymmetrical : — one being normal, 

 the other of six segments only, of which the 4th is much the longest. Legs somewhat 

 robust ; anterior tarsi with a median constriction. Anal cleft short, about twice 

 the length of the lobes or one-eighth the length of the body. Anal lobes (fig. 16, b) 



