122 COLLEMBOLA FROM NORTHERN SARAWAK. 



Diagnosis. Ant. 1 = 1: 0.84-1: 2.10. 



Ant. I : 11=1 : 0.75-1 : 2.05. 

 Abd. Ill: IV = 1 : 5.40-1 : 6.87. 

 Manubr : Mucrodens = l : 1.44-1: 1.80. 



Eyes 8 + 8; proximal ocelli smaller than the other ones. 



Antennae of medium length, of about the same lenp,th as 

 the body judged from a single individual, which, however, has 

 one joint abnormal. 



Claws with a proximal double tooth and a simple distal one. 

 Pseudonychia distinct, empodial appendix with a upstanding 

 toothlike formation at the middle of the internal side which is 

 longer in the third pair of legs than in the other ones. 



Tibial sensitive seta with a distinct incrassation , which does 

 not extend to the middle of the claw. Furcula without dental 

 vesica, with a double row of dental spines which, however, 

 sometimes seem to be absent ; mucrones with six teeth and 

 basal spine. 



Scales small, pointed, pubescent. Body covered with small 

 black, serrated setae, especially richly developed on the strongly 

 pigmented cross-bands and other darker spots. On the ventral 

 side there are fairly long and densely arranged feather-like 

 setae. 



The living animal probably has the head covered with strong 

 setae, directed forwards and incrassate in the ends. In one 

 individual a single such one can be seen. A ring of strong 

 apical setae protrude as spears over the posterior margin of the 

 head, originating from the anterior margin of mesonotum. 



Coloration. Yellowish dark markings, head to a great 

 extent black-pigmented, mesonotum with a broad indistinctly 

 limited cross-band, posterior half of mesonotum with a more 

 narrow one. There are also strongly marked cross-bands on 

 Abd. Ill all along the segment, in the middle of Abd. IV and on 

 Abd. V and VI. On Abd. IV there are big lateral markings, 

 with vague contours sometimes extending into a broad vague 

 fascia across the posterior part of the segment. Legs dark 

 with lighter coloured tibiae ; antennae and furcula light. 



In another form the body lacks markings almost entirely, 

 being only slightly shadowed. The two first joints of antennae 

 bronze coloured, with bluish-green rings at both ends and an 

 irregular dark marking in the middle ; tibiae bluish-green, 

 manubrium yellow ; dentes pale bluish-green. 



To these two colour variations most individuals can be 

 referred. 



