598 1VAR TRAGARDH 
of the hysterosoma etc. It is therefore in many instances almost impossible 
to know to which genera to refer many species and this applies especially to 
the United States, where a great number of species are rather imperfectly de- 
scribed. The present species is a good instance of this deplorable state . 
of knowledge. On the wohle it seems to be most closely related to the 
senus Chamobates HULL characterized by HULL as follows: »Small species. 
Lamelle small. Translamelle absent. Tridactyle. Type species: cuspidatus 
MICH.» 
To this genus HULL (p. 393) refers two species with distinct cusps on the 
lamellae and four species without distinct cusps or angles on the lamelle. 
Nevertheless SELLNICK (1929, p. 14) writes ou Chamobates: »Lamellen endigen 
in eine scharfe Spitze; das Lamellenhaar steht am Grunde der Spitze auf dem 
Propodosoma.» 
If, however, we accept the views of HULL, which 
we ought to do, there is nothing that prevents us 
from referring the present species to Chamobates, at 
least provisionally. 
Length 730 uw. Width 510 uw. 
Colour light brown; texture polished. 
Propodosoma very shite measuring only about 
one fifth of the entire length. The demarcation line 
between the propodosoma and hysterosoma is curved 
in an even curve forwards and very distinct on dis- 
sected specimens but otherwise rather difficult to dis- 
cern. The rostrum has a short, rounded, median 
mucro set off from the lateral margin by two short, 
rounded incisions. Rostral hairs straight, a little more 
than half as long as the lamellar hairs. The lamellz 
Fin gi) Chamiaies arcie ate about half as long as the propodosoma and of 
dentata n. sp. almost even width throughout, with slightly wavy 
dorsal margin and tapering rather abruptly towards 
the anterior end, where there is no cusp. No translamella. Lamellar hairs 
inserted a little behind the point, where the dorsal edge of the lamella dis- 
appears, straight and as long as the lamella. Interlamellar hairs straight, by 
*/2 longer than the lamellar hairs. Behind the insertion points of the lamellar 
hairs, there are a couple of dark, rounded spots, close to the anterior margin 
of the hysterosoma (fig. 92). 
Pseudostigmata funnel-shaped (fig. 93), with a distinct constriction in 
the middle, which divides them into a larger external and a narrower interior 
part. They are situated at the sides of the propodosoma and almost completely 
hidden by the anterior edge of the hysterosoma which in front oft hem seems 
to be coalesced with the lamellae. Seen from above the external margin of 
the pseudostigma has a sharp, tooth-shaped projection pointing obliquely back- 
wards and outwards. On lateral view the exterior part of the margin projects 
a little more beyond the edge of the pteromorpha than the median one. 
Pseudostigmatic organ (fig. 96) with long, slender peduncle, curved 

