CANTHOCAMPTUS. 49 
life, but abdomen after death bent to a right or acute 
angle on the thorax. Head coalescent with first 
thoracic segment, rostrum short and blunt. Abdo- 
men 4-jointed, the first jot being very large and 
formed by the fusion of two rings; lower border of 
each ring finely pectinated; the last joint produced 
downwards at the dorsal angle into a short spinous 
process. Anterior antenne slender, 8-jointed, about 
as long as the first cephalothoracic segment, all the 
joints nearly equal in length except the fifth, which is 
very short, and the last, which is the longest and most 
slender; the fourth joint has attached to its apex a 
stout rod-like seta (fig. 2 a). The second antenna is” 
moderately long, 2-jointed, and has a small biarticu- 
lated branch affixed to the inner margin of the basal 
joint (fig. 8). The mandible (fig. 4) is stout and bears 
a small biarticulated palp. The main stem of the 
maxilla (fig. 5) is divided at the apex into several claw- 
like segments, and has two lateral lobes, one large and 
bearing numerous setz, the other slender and having 
only one apical claw; on the opposite margin is a 
small bisetose tubercle. The first foot-jaw is divided 
at the apex into three claw-bearing segments (fig. 6) ; 
the second (fig. 7) is 3-jointed and narrow, the last 
small and slender, terminating in a long, curved claw, 
and a small seta. ‘The inner branch of the first foot 
(fig. 9) is about twice the length of the outer (which 
reaches only to the apex of its first joint), the second 
joint is short, and forms at its junction with the pre- 
ceding a flexile hinge; the last joint, which is long 
and slender, has at its apex one very long, and two 
VOL. II. D 
