AFRICAN SCALE INSECTS (COCCIDJE). 



87 



Parastigmatic glands generally absent, but a single one is sometimes present at 

 the anterior stigmata. Margin of cephalo-thoracic region with a few widely 

 separated, and minute spines. Pygidium with five widely separated groups of 

 circumgenital glands ; formula : — 



8 11 8 



17 - 16 19 - 19 19 - 18 



14 - 13 16 - 15 15 - 15 



The last three abdominal segments with extensive groups of large dorsal 

 pores ; and there ai-e three or four much smaller ones on each of the two 

 succeeding segments, near the margin ; fringe of pygidium (fig. 2) with three 

 pairs of lobes ; the median pair recessed and smallest ; second and third pairs 

 duplex, margins straight ; there is a large projecting pore between the first and 



Fig. 2. — Diaxpis regiilarh, Newst. ; margin of pygidium of adult female. 



second and the second and third pairs of lobes, and two beyond them, these 

 projections are distinctly lobe-like, so much so that they may be easily mistaken 

 for true lobes. There is a large simple squama just in advance of the third 

 duplex lobe and two beyond the last projecting pore ; those on the free abdominal 

 segments are much the largest. 



Male jniparium. — Sti'ongly tricarinate, texture close, thin and semi-trans- 

 parent ; colour white, pearly white or greyish white ; pellicle pale ochreous or 

 colourless. Length, "75-1 mm. 



Mubendi, Entebbe, Uganda, 10. VIII. 1909 (C. C. Goicdey). Food-plant not 

 stated. 



The puparia of both the males and females are all arranged with the greatest 

 regularity and all pointing in the same direction upon the leaf. This is not a 

 unique habit with the Diaspinae, but I do not remember having hitherto seen 

 this character attained to such a marked degree in both sexes. 



The boss-like puparia of the females are very distinctive ; and the fringe of 

 the pygidium is also strikingly characteristic. 



Diaspis cacti, Comstock. 



On Prickly Pear {Opuntia sp.); Marg, Egypt, "Autumn, 1909" {F. C. 

 Willcochs). 



This insect has not hitherto been recorded from Africa, though the very 

 closely related Diaspis calyptroides, Costa, has been found there. 



20 419 A 2 



