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numerous near the distal extremity; a number of them are placed in a longitudinal row which 

 makes an angle with the basal margin. In the variety communis this row is composed of 

 a few spines only, a dozen or there about, and these form a single row, almost giving the 

 impression of separating a rounded and slightly swollen terminal part from the rest of the 

 palpus. The same row is visible in the variety malayensis, but the spines are much more 

 numerous and disposed in an incompletely doublé row; the part of the palpus to the exterior 

 of this row, in the latter variety, is perfectly continuous with the remaining part of it. The 

 inner surface of the palpus bears numerous shorter hairs or small spines, a row of them being 

 disposed along a curved ridge, which runs almost parallel to the outer edge of the labrnm, 

 when the palpus is in rest. Very delicate hairs or ciliae are disposed along the under margin 

 of the palpus. 



Mandible (Pi. XIV, fig. 13). Teeth 1 and 2 pointed at the extremity, tooth 3 thick 

 or broad ; inferior part of mandible, in most specimens, slightly developed only, with teeth 4 

 and 5 and inferior angle rudimentary, the latter in some specimens quite wanting. Teeth 2 

 and 3 doublé at the extremity, teeth 4 and 5 triangular and pointed in some specimens. 



Maxilla (PI. XIV, fig. 14 and 14*). Notch under upper pair of spines absent or 

 only slightly indicated. Inferior pair of spines sometimes on a distinct step-like projection, 

 sometimes this step at the inferior angle is small, sometimes almost wanting. lts size is 

 different, even in specimens from the same locality, yet, generally it can be said, that the step- 

 like projection in the variety communis, is develojaed stronger than is the case in the variety 

 malayensis. Between the two pairs of spines, the edge bears from 5 to 7 much shorter spines. 

 They are placed in a single row, their free extremities diverging from the plane of the maxilla, 

 alternatively upward or downward. In the outer part of the maxilla the upper and basal 

 margins run quite parallel ; whereas the upper margin is strongly curved towards the apodeme, 

 the outer part of the maxilla is almost quadrate. 



Outer maxillae (PI. XIV, fig. 15). Outer lobe elongately oval, very densely clothed 

 with hairs upon terminal part, and over the whole surface along the inner side ; hairs feathered 

 as usual ; inner lobe narrow, also elongated, covered with numerous hairs, which are longer on 

 the middle part, directed downward and inward, and much shorter on the inferior part of the lobe. 



Cirri. First pair: rami unequal, the number of segments increasing with size or age. 

 The greatest number of segments observed is 14(15) in the shorter and 20(21) in the longer 

 ramus. The segments of the longer ramus — with the exception of the terminal ones — are 

 indistinctly separated, those of the shorter ramus are strongly protuberant on their inner faces, 

 and have dense tufts of hairs disposed on these protuberances. In a small individual, 8 (9) and 

 12 (13) segments only were counted in the two rami of this cirrus ; between these two "extremes" 

 all possible combinations were observed. 



Second pair: rami slightly unequal, the number of segments varying from 9 in the 

 shorter, and 10 in the longer ramus, to 13 and 14 segments. All the segments distinctly pro- 

 tuberant on their inner faces, and bearing dense tufts of hairs on these protuberances. Other 

 nearly equally dense tufts of hairs are disposed on the outer face, and near the extremity of 

 the segments. 



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