98 Mr. B. F. Cummings on 



liairs well spacecl one beside the otlier and extending from 

 the proximal to the distal extremity, Preaxially a single 

 hair. On segment 2, three hairs on the upper surface and 

 one lono- one on postaxial margin. On segment 3, at the 

 postaxial angle of tlie distal end, four or five stout hook- 

 shaped denticles ; on the preaxial side a patch of short 

 spines. Preaxially three hairs, postaxiallj two, on dorsal 

 surface two. 



Thorax and abdomen : cluetotaxy too uncertain to justify 

 description. 



Chcetotaxy. Female. — Antennse more heavily set with 

 hairs. 



Thorax : a short hair on each lateral margin of the pro- 

 thorax and two on each lateral margin of the meso-meta- 

 thorax. 



Abdomen : on the dorsal surface, probably a row of small 

 hairs across each segment. 



A moderately long bristle on each pleurite of penultimate 

 segment. Several fairly long hairs along lower margin of 

 tergite, two of these close together at tiie postero-latoral 

 corner of the tergite. On the terminal sternum two patches 

 of minute hairs, closely set one on each side of the middle 

 line. Along the lower margin of the gonopod, seven or eight 

 longish hairs. 



Mouth-parts. — The left mandible is a powerful, gnarled- 

 looking weapon, complex in form and moulding*. For the 

 purpose of description it may be divided into halves — a 

 proximal and distal — by a transverse band of dark brown 

 chitin on the ventral surface. The proximal half is a kind 

 of pedestal on which the rest of the mandible is set. The 

 distal half, narrower than the base, ends in three distinct 

 {ipices irregularly placed. There are the usual two articular 

 surfaces, one a rounded condyle beneath the basal process, 

 and the other a rather large concavity into which fits a 

 big tendon. The basal process is rather long and bent, 

 as usual, so as to point horizontally. Distally the opposable 

 surface of the mandible possesses the usual transverse ridges, 

 disposed in two series separated from one another by a smooth, 

 concave area. 



The right mandible possesses a wide straight base-line, and 

 from the outside two-thirds of this the main body of the 

 mandible arises, leaning outwards at first and then bending 

 inwards sharply, making an angle on the outer margin, 



* The mouth-parts, especially the mandibles and the oesophageal 

 sclerite (or lyi'iform organ), afford useful systematic characters in the 

 Mallophaga, 



