IO 
IVAR TRÄGÅRDH. 
(Schwed. Südpolar-Exp. 
Gamasiphis Berl. 
1904. Gamasiphis nov. gen. Berlese. Acari nuovi. Manipulus 2, in Redia, vol. I. fasc. 2, 
1903. p. 261. 
Syn. 1907. Heydeniella nov. gen. F. Richters. 
The genus Heydeniella lately instituted by RICHTERS [9] is undoubtly the 
same as Gamasiphis Berl. RICHTERS tells us that the genus is characterized 
by the ventri-anal shield being coalesced with the dorsal shield. In the male the 
shields are stated to have quite coalesced; in the female a short split is said to exist, 
extending backwards from the limit between the genital, ventri-anal and dorsal shields. 
Now this feature happens to be exactly the characteristic of the genus Gamasiphis! 
To be convinced of this fact we need only glance at the drawings of G. pulchellus 
Berl. the type species of the genus Gamasiphis made by BERLESE [i. fasc. 39, 
No. 4]. It is true that also in Parasit ns sub g en. Ologamasus these shields are more 
or less coalesced, but as Richters’ species is stated to have a free calcar mandi- 
buli, it belongs to Gamasiphis ; otherwise it would belong to Parasitais subgen. 
Ologamasus. 
o 
4. Gamasiphis loricatus nov. spec. 
(PI. I, figs 4, 5 & 7, text-figs 15 — 17.) 
Male. Length o, 94 mm. Breadth o, 55 mm. 
Shape oval, with distinct shoulders; the anterior margin rounded, the posterior a 
little pointed. 
Colour , deep chestnut brown. 
Texture scaly by fine, raised and undulating lines, running transversally and 
connected by other, oblique lines, thus forming irregular hexagonal-oval areas. 
Dorsal side covered by a single, somewhat arched shield, with about 25 pairs 
of regularly placed, fine, straight, pointed hairs, gradually becoming longer towards 
the posterior margin; about 12 pairs of marginal hairs. 
' Ventral side (PI. I, fig. 5). Tritosternum with an incision near the base. One pair 
of jugular shields , with narrow median halves, anterior margin concave, gradually rising 
towards the lateral third; the exterior angles with an incision, no hairs (text-fig. 17). 
Sternal shield of even width throughout, extends backwards to the level of the 
hind margin of coxæ IV; anterior margin straight, with a great circular incision to 
receive the genital aperture; the posterior margin slightly convex; antero -lateral 
angles long, extending as far as the exterior margin of coxæ II; postero-lateral angles 
short and pointed. 
