22 



ROBERT NEWSTEAD. 



Marginal spines visible under a two-inch objective. Ovisac very short, slightly 

 overlapping the sides of the female, and most pronounced posteriorly. Specimens 

 attacked by Chalcidid parasites are very elongate, highly convex and of a red-brown 

 colour ; no ovisac was formed by them. Length of $ and ovisac, 2-3*3 mm. 



After treatment in KOH the form is more or less ovate or broadly pyrif orm. Antennae 

 (fig. 14, a) normally of eight segments, rarely of seven ; in the latter case the 3rd and 

 4th are either completely fused or only partly so (fig. 14, b) ; hairs on the terminal 

 segments relatively short. Marginal spines (fig. 14, c) long, stout and pointed ; 

 they are placed closely together, the space between them being much less than their 

 length, more especially so are they on the frons and the distal margin. Stigmatic 

 clefts obsolete ; stigmatic spines (fig. 14, c) usually six in number, of which two pairs 

 are much larger than the others, broad, curved and flattened. First pair of legs 

 (fig. 14, d) with the tarsus bearing a well-defined dorsal constriction. Anal lobes 

 (fig. 14, e) with the distal portion thickened, convex, and with many fine hairs ; 

 beneath the tips are two pairs of long slender hairs, one pair being a little more than 

 half the length of the lobe. Anal cleft slightly less than one-fifth the length of 

 the insect. Anal ring with ten hairs. Circumgenital glands small, but very 

 clearly defined. Venter, just in advance of lobes, with two pairs of hairs, one pair 

 much longer than the other. No derm glands or pores traceable. Length, 2-2*5 mm. ; 

 width, 1*5-2 '6 mm. 



British Guiana : Rockstone, on " blood- wood " plant, 30.xii.13 (G. E. Bodkin). 



A species of ant had built little shelters or " tents " over some of the females. 



Pulvinaria subterranea, sp. nov. 



Ovisac. White and felted and, when complete, very elongate, with traces on the 

 proximal portion of 3-4 longitudinal groves ; incomplete forms more robust and 

 decidely more convex. Length of elongated forms, 3*5-4*5 mm. ; short forms, 

 2-2*5 mm. 



Fig. 15. Pulvinaria subterranea, Newst., sp. n., $; a, a, antennae ; 

 b, stigmatic cleft and marginal spines ; c, anal lobe. 



