100 MYKiAl'UUA. 



form of clusters of ocelli. The jaws of the Millipedes are like 

 those of the cockroach ; but in the Centipedes the jaws are 

 formed out of the forelegs, each with a hollow tube perforating 

 the jaw, which is connected with a poison-gland on each side at 

 the base. 



The Centipedes are carnivorous in habit, and thus friends to 

 the agriculturist, whilst the Millipedes or vegetable feeders are 

 noxious. The latter are known as False-wireworm. 



Young Myriapoda are composed of a few segments only, and 

 with six legs on the first three anterior segments ; they grow by 

 the addition of new segments posteriorly, and cast their skin a 

 number of times until they become sexually mature. The chief 

 family in the ChUognatha are the Iididce or " snake millipedes." 



One genus, Glomeris, resembles 

 in appearance and habits the 

 wood-louse. The most destruc- 

 tive are those of the genera 

 lulus and Polydesmus. lulus 

 pulchellus (fig. 38, a) is one 

 of the most harmful species, 

 and is extremely common. It 



A, lulus vmlchdlus ; b, I. Londinensis; . t t if ■ i • i ji 



o, antenna of /. terrestris. IS nearly half an nich m length, 



slepder, about the thickness of 

 a fair-sized pin ; it is pale pinkish-yeUow in colour, with a double 

 row of bright crimson or purple spots on it. It is found in 

 roots, and especially amongst the scales of lilies, which it causes 

 to decay, as well as in most other plants. The young have only 

 a few segments and three pairs of legs, which appear on the 

 second, third, and fifth segments. After repeated moulting 

 they reach maturity, when they are composed of about fifty 

 segments. Like all lulidae they live upon decaying vege- 

 tation and sound plant tissue, and are said to feed on slugs, 

 snails, worms, and insects. This latter, however, I cannot 

 verify by experience. Two other species are common — namely, 

 the large black lulus terrestris (Linn.), with a pointed tail ; and 



Pig. 38.— Millipedes. 



