Genera and Species of Mt'llijjeJes, 445 



PaRADESMORHACHIS, gen. nov. 



First teigite broadest behiiul tlie inidJle; keels of second 

 and third tergites with simple toothed side-edges; fourth and 

 following segments to the eighteenth with margins strongly 

 thickened, smooth, as in many Oriental {e.g. Burmese) species 

 of Ort/ivniorp/io, the pore situated on the thickening in its 

 posterior half, about its own diameter from the edge, looking 

 upwards and outwards ; nineteenth tergite with simple normal 

 keels ; caudal process semielliptical ; dorsal surface of segments 

 granular, with three rows of tubercles or granules, the poste- 

 rior being most conspicuous. 



Sterna not spined. 



Anal sternite bitubercular. 



Copulatory foot of male with two long prongs, curved 

 inwards apically. 



ParadesmorhacJiis solomonis^ sp. n. (Fig. 19.) 



Colour a uniform greyish brown ; margin of keels greenish 

 grey, shining. 



Length of antennce nearly equal to width of second segment. 



First, second, and third tergites somewhat coarsely 

 granular all over, strongly convex, with the keels of second 

 and third nearly horizontal, with toothed side margins, the 

 anterior and posterior edges being mucli more finely toothed. 

 The rest of the segments much smoother, the keels and back 

 nearly horizontal, only weakly granular, the posterior row of 

 tubercles conspicuous, the rest faint, the tubercles spreading 

 on to the keels ; anterior and posterior borders of keels irregu- 

 larly tubercular, except on the thickened margin, which is 

 smooth ; posterior angles acutely rounded, in no sense 

 spiniform ; anterior angles obtusely rounded, anterior border 

 strongly shouldered at base. 



Copulatory feet strongly curved, the convexity outwards, 

 ending in two long prongs, the lower angled at the base and 

 running forwards, the upper continuing the curvature of the 

 basal piece and projecting inwards and backwards. 



Measurements in millimetres. — Total length 43 ; width of 

 second tergite 0"8, of fifth 6'2. 



Lac. Solomon Islands (C. M. Woodford) . 



POLYDESMORHACHIS, gen. noV. 



First tergite broadest across the middle, where on each 

 side it is furnished with a conspicuous tuberculiform keel. 

 Second segment as wide as the tifth. Keels horizontal or 

 elevated, keels of only the posterior three directed backwards. 



