200 Life History of Wireivorms 



the posterior margin. The edge of the border is defined by a transverse 

 brown line and a transverse series of minute pores, which are almost 

 equidistant from each other. The meso- and meta-notum, as also ab- 

 dominal segments 1-8, have the border only on the posterior margin. 



The pronotum, hke the tergite of each succeeding segment up to the 

 8th abdominal segment, is separated from the pleura by a narrow suture, 

 running from one marginal border to the next. The pleura of the prothorax 

 is, however, nearly triangular in shape instead of being parallel-sided as 

 in the other segments. 



Prothoracic sternum large, pentagonal, with its apex extending 

 almost to the anterior coxae. Sterna of the meso- and meta-thorax 

 narrow, nearly parallel-sided but somewhat broader in the middle. All 

 coxae are surrounded by striations, concentrically arranged around their 

 bases, except on the inside. They are rather long and pale and bear on 

 their anterior and posterior faces a number of short, stiff, brown bristles. 

 Each is approximate to its pair. A small browm spot, having the appear- 

 ance of a pore, is placed near the lateral margin of the coxa. 



Each succeeding segment of the leg is considerably shorter than the 

 coxa and the broadest little more than half its breadth. 



Trochanter much longer on the inner than the outer side, femur on 

 the outer than the inner. 



Tibia about equal in length to the femur but more slender. Tarsus 

 consisting of a single segment, narrowed at a short distance from the 

 base into a long, sharp, almost sickle-shaped claw. 



The inner margins of the trochanter, femur and tibia bear short stiff 

 bristles like those of the coxa, evidently of use in progressing through 

 the soil. There are also two long fine setae attached to the inner margin 

 of the trochanter, and one to the femur, as well as a whorl of rather 

 shorter fine hairs round the base of the tarsus. The outer margin of the 

 leg bears only a few fine, short hairs. 



On the upper surface the cuticle is shallowly sculptured with fine 

 punctures and irregular sutures, its general appearance being much 

 smoother than in that of A. sputator (Plate IV, figs, b and c). The area 

 anterior to the spiracles is smooth, or almost so. There is a fine medio- 

 dorsal suture running from the anterior margin of the prothorax to the 

 posterior margin of the 8th abdominal segment interrupted in its course 

 only by the marginal striations already mentioned. 



The tergite of each segment from prothorax to 8th abdominal seg- 

 ment bears two transverse rows of six rather long yellow hairs near the 

 anterior and posterior margins respectively, the posterior hairs being 



