4 ARKIV FÖR ZOOLOGI. BAND 3. N:0 28. 



IV and as far as to the hind part of foveola pedalis IV fused 

 together with the metapodial shield. The ventral and anal 

 portion of it are provided with about 60 short, sharply pointed 

 and almost perpendicular spines and bears beside these four 

 pairs of hairs. 



The genital shield is situated far forward between the legs 

 II; it is rather large, square-oval, twice as wide as long, rounded 

 posteriorly and laterally. 



The anus is small, oval, situated behind the centre of the 

 ventri-anal shield. 



The 77ietapodial shields are enormously developed, extend 

 backwards to the level of the anus and forwards externally of 

 the peritremata along their whole length and are anteriorly 

 fused together with the marginal shield. Their internal edge 

 is concave and parallel with the lateral edge of the ventri-anal 

 shield. The posterior interiör part of them bears about 15 

 spines of the same shape as those of the ventri-anal shield and 

 one hair. 



Between the peritremata and the marginal plate and along 

 the lateral edge they are provided with numerous small fissures 

 parallel to the lateral edge, which are the orifices of short. 

 round ducts in the cuticle in connection with subhypodermical 

 glands. 



The 'peritrematic shield is narrow, only discernible on the 

 interiör side of the peritremata. The peritremata extend for- 

 ward to the level of the anterior edge of coxa II. The stigma 

 is rather large. 



The pseudocaj)itulum is ventral, covered by the anterior 

 edge of the dorsal shield. 



The epistoma (Fig. 8, Pl. I) is anteriorly triangulär, with 

 slightly concave edges, ending in a strong chitinous mucro, 

 reticulated. 



The maiidihles (Fig. 14, Pl. I). The upper jaw is slender, 

 slightly longer then the lower jaw, and is ventrally only pro- 

 vided with two teeth near to the anterior end; on the dorsal 

 side near the end are two small tubercles. The upper jaw is 

 on its internal side provided with two appendages: 1, a thin 

 membranaceous lanceolate slip, finely striated and clothed 

 with small hairs, which extends forwards nearly as far as the 

 so-called lacinia of the lower jaw and is attached to the jaw 

 along one third of its own length. 



