UK. \Nll.M HEMISPH.ERICI M. 115 



(fig. 2) of eight joints, of which the second, third, 

 fourth, fifth, and eighth are longest, and the sixth and 

 seventh shortest and of eqnal length ; formula 3 (2, 4), 

 8 (1, 5) (6, 7). Legs (fig. 3) much longer than the 

 antennae, stout ; there is a single longish hair on the 

 coxa, a very long one on the trochanter, there are four 

 on the tibia, of which that nearest the tibio-tarsal 

 articulation is the longest, and at least two minute 

 ones on the tarsus ; digitules to claw so much dilated 

 at base and apex as to almost obscure the claw, those of 

 the tarsus comparatively short and simple. Anal ring of 

 (?) six hairs. Dermis above (fig. 56) with numerous short 

 ovate, clear derm-cells ; ventral dermis thickly set 

 with tubular spinnerets (figs. 5, 5 a), which are more 

 numerous towards the margins ; and there are four 

 long hairs equidistantly placed around the anal lobes, 

 and several others, of varying lengths, in two groups 

 between the insertion of the antennae. Marginal hairs 

 (fig. 4) usually flattened at the extremity and variously 

 serrated, but some are simple and slightly curved ; in 

 the majority of specimens they get broken off, either by 

 removal from the food-plant or during preparation 

 for the microscope. Stigmatic spines three in number, 

 all of which are strong and blunt, and the central one 

 is longest, but these, like the marginal spines, are also 

 frequently broken off. 



Hemispherical forms, 2-2*50 mm. 



More or less ovate forms: high, 1*50-2 mm.; wide, 

 1*50-2 "75 mm. ; long, 2* 25-4' 25 mm. 



Clypeate forms: high, 1-1/75 mm.; long, T25- 

 3-25 mm. 



Immature female (fig. 9) usually pale yellow, but 

 sometimes opaque white, with a strongly defined 

 central and two lateral carinae, forming roughly the 

 letter H. 



Female at period of gestation (fig. 6) retaining the 

 characteristic H -shaped carina3 of the younger insect. 

 Colour rich, dark chocolate-brown, or plum colour, 

 with the margins and carinse paler ; and the whole of 



