194 
Psyche 
[June-September 
the mouth, tarsal claws last. This occurs in both families and all 
three genera. 
Midleg Clean. A midleg is brought forward alongside the body 
and the head turns and dips to reach it, the limb moving posteriorly 
through the mouth, tarsal claws last. There are three modes: under 
L\, in which the foreleg is raised out of the way, in both families; L\ 
pull, in which the raised foreleg is used to pull the midleg into 
the mouth, seen rarely in Campodea and reported in Dipljapyx by 
Pages (1967); and over L\, where the foreleg remains on the 
substrate and the midleg crosses above is, seen in Metajapyx. 
Hindleg Clean. A hindleg is brought forward alongside the 
laterally arched body and the head turns and dips to reach it, the 
limb moving posteriorly through the mouth, tarsal claws last. 
There are three modes in Diplura: under L\+ 2 , where fore and mid 
legs are raised out of the way, in both families; under L\, over L 2 , 
which is self-explanatory and occurs in both families (in this mode 
both families usually raise and partly extend Li, and japygids some- 
times flex Li and position it under the body); and L\ pull, in which 
the foreleg helps pull the hindleg to the mouth, in Campodea and 
Dipljapyx. 
Fore-Midleg Clean. Ipsilateral fore and midlegs are passed 
simultaneously through the mouth in anterior-posterior sequence. 
This infrequent action occurs in both Campodea and Metajapyx. 
Sometimes both tarsi are involved, but usually the fore tarsus and 
mid tibia are the parts cleaned. 
Fore-Hindleg Clean. As above, the ipsilateral limbs moving 
posteriorly through the mouthparts, observed rarely in Campodea. 
Mid-Hindleg Clean. As above, except that the movement seems 
to be a rare continuation of Hindleg Clean, under L\+ 2 , where the 
midleg becomes involved; in no case was the movement initiated 
independently of Hindleg Clean. This movement was observed 
rarely in Metajapyx. 
Body Clean. Both families can bend double and use their mouth- 
parts to groom body surfaces from the thorax to the cerci. These 
movements are less frequent than other grooming, so it is not 
known if the differences between the two families are real or 
sampling error. Watching these animals, the observer rapidly gets 
the impression that they can probably reach any body part they wish 
except the pronotum. At present, the campodeids have been seen 
cleaning all three coxae with the head directed ventro-posteriad; 
