638 DAVID BRYCE ON FIVE NEW SPECIES OF 



three joints, hidden except spurs. Corona rather wider than 

 collar, pedicels separated by moderate sulcus. Upper lip low, 

 central portion slightly produced to about level of nexus between 

 pedicels, rounded and undivided. Sides of mouth with strong 

 external prominences. Rami obtusely angled, each with four 

 teeth. Spurs slender, acute, held nearly parallel, sometimes 

 slightly incurved, decurved, claw-like, bases separated by inter- 

 space nearly equal to spur length. Toes three, small, conical. 



In adults the whole body is tinged with yellow, and some- 

 times the skin is slightly viscous. It usually attains its 

 greatest width in the hinder part of the fourth central segment, 

 and thence narrows rapidly to the small foot, which is so 

 hidden beneath the rump that even when crawling only the 

 spurs can be seen in dorsal view. In this it resembles Habro- 

 trocha elegans (Milne), but the body is generally stouter, the 

 increase in size rearwards more marked, and the spurs are not 

 peg-like. When disturbed it crawls about very actively. The 

 corona is wider than is usual in the genus, exceeding the width 

 of the collar. This is not obvious, for the lateral margins of the 

 mouth have each a strong rounded external prominence, which 

 are visible in dorsal view, and, being exactly at the level of the 

 collar, add to the apparent width of the latter. A similar effect 

 has been seen and described in Calledina angusta Bryce, and I 

 have also seen it in Calledina aculeata (Milne), but in these species 

 the prominences are angular and rather less conspicuous. The 

 post-oral segment has an annular thickening of the skin, rising 

 to small bosses at right and left of the base of the antenna. The 

 neck and gullet are not unusually long, and the brain is close 

 behind the antenna. The rami are somewhat triangular in out- 

 line, and have each four well-marked teeth. When feeding, the 

 foot and the greater part of the rump segments are usually with- 

 drawn or hidden beneath the trunk. The spurs are rather 

 slender and acute, held almost parallel, the inner side almost 

 straight, the outer slightly curved, somewhat decurved and 

 claw-like, and have their bases separated by a moderately wide 

 interspace ; altogether they are of an unusual and rather dis- 

 tinctive form. 



The stomach usually contains pellets of good size. The 

 process of their formation has been described above. 



This very distinct species seems to take up its position in 



