6io 



IVAR TRAGARDH 



males. Moreover, even the females have not been properly investigated, as in 

 many of them the shape of the epistome has not been described. 

 Length c. loio (a, width c. 600 \l. 

 Length of dorsal shield c. 960 [i, width 580 [jl. 

 Colour chestnut-brown. 



The dorsal shield (fig. 121) covers almost the whole dorsal side, leaving 

 only a very narrow strip of soft cuticle unprotected at the sides and the pos- 

 terior end. Its anterior edge is broadly rounded and from the shoulders it 

 narrows gradually backwards with almost straight sides. The texture is poly- 

 gonal, marked with fine raised lines, the areas being areolated. The whole 

 pattern is, however, rather faint and is obliterated along the anterior margin 

 and in the posterior end, where there are smooth areas. From the shoulders 



there runs an almost semicircular, darker line across 

 the body. A somewhat similar line has been de- 

 scribed by VlTZTHUM (1926, fig. 20, p. 30) in C. 

 multihamatus . 



The vertical hairs (fig. 122) are lanceolate, thin, 

 with fine oblique fringe at the top. The other hairs 

 are fairly stout, curved and finely hairy in the distal 

 half (fig. 123) and of almost uniform size. There are 

 also numerous pores scattered over the dorsal shield. 

 Ventral side. The sternal shield (fig. 128) 

 is fused with the endopodal shields to the angle be- 

 tween coxae II and III; further backwards it is free. 

 Its anterior margin is deeply excavated, less so the 

 posterior margin. It widens considerably between 

 coxa; II and III, and the postero-lateral angles are 

 obtuse. The sternal shield has a very distinct, straight, 

 but slightly serrated linea media transversa and two 

 linear obliquai anteriores, whereas the linea angulata 

 is almost completely obliterated. There are tlie typ- 

 ical two pairs of pori repugnatorii and from the 

 posterior pair a line is running transversally towards 

 the middle. In the anterior half, in the middle very faint small circular de- 

 pressions are visible, otherwise the shield has no sculpture. The three pairs 

 of hairs are present in their usual places. 



Metasternal shields very small, oval, with one bristle (fig. 129). 

 Genital shield (fig. 129) rather small, with straight posterior margin, a 

 little excavated near the postero-lateral angles. It is by a pair of deep lateral 

 incisions constricted in the middle into two parts, one posterior which is al- 

 most semicircular, and one transparent anterior, which is oval. Along the 

 margin of the posterior shield there is a pair of narrow, bar-shaped ridges. 



The genital shield has two oblique lines converging forwards and one pair 

 of hairs. 



The ventri-anal shield (fig. 130) is small, about 270 [j. long and 250 (i wide, 

 elongated pentagonal, with almost straight anterior margin and well rounded 

 posterior end. It is sculptured by six anteriorly convex, nearly paralell, curved 



Figs. 



128. 

 nital 



128 — 130. Coprholaspis 



arcuatus n. sp. 

 Sternal shield. 129. Ge- 

 and metasternal shield. 

 130. Anal shield. 



