Genera and Species of Millipedes. 445 
PARADESMORHACHIS, gen. noy. 
First tergite broadest behind the middle; 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 Orthomorpha, 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. 
Paradesmorhachis solomonis, sp. n. (Fig. 19.) 
Colour a uniform greyish brown; margin of keels greenish 
grey, shining. 
Length of antenne 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 much 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 5:8, of fifth 62. 
Loc. Solomon Islands (C. WM. 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 fifth. Ieels horizontal or 
elevated, keels of only the posterior three directed backwards. 
