1914] Banks—Acarians from Brazil 161 
Macrocheles cordiger Berl. Specimens, which are probably this 
species have the dorsal shield less narrowed behind than 
Berlese figures. They are from Porto Velho, Rio Madeira, 
on Phaneus (Mann). 
Hypoaspis scutalis sp. nov. 
Body about once and a half longer than broad, nearly truncate behind, sides 
nearly parallel. Dorsum without hairs, two stout ones on margin near tip, and 
short bristles on ventral edge near margin; palpi long and prominent; legs I and TV 
fully as long as body, last joint of leg I very much longer than the preceding joint; 
leg II rather stout in the middle; all with short hairs or spine-like bristles. Sternal 
plate with three hairs each side, not near margin, one on a small plate at base of 
coxa III. Vulva shows a triangular opening. Ventri-anal plate extremely broad 
in front, concavely narrowed on posterior sides, nearly twice as broad in front as 
long, a few stout bristles each side; anus with a hair each side. Length .7 mm. 
From Abuna, Rio Madeira, Brazil (Mann coll.), on Scarabeeide. 
Hypoaspis invertus sp. nov. 
Yellowish brown. Body nearly one and a half times as long as broad, narrowed 
in front, dorsum without hairs, except on margin, four each side behind, and two 
each side in front of coxee III. Legs moderately slender, but short, and with few 
hairs. Sternal plate with three bristles on each side, one behind at base of coxa 
III, and another at base of coxa IV. Peritreme long, rather remote from the coxe. 
Ventri-anal plate large, inverted pyriform, much broader in front, concavely nar- 
rowed behind, about three bristles each side in front, and one each side of the anus. 
Length, .6 mm. 
From Abuna, Rio Madeira, Brazil, on Scarabeeidee (Mann coll.). 
Megisthamus armiger Berl. One from Itacoatiara, Amazon, on 
large Passalus (Mann). . 
Euzercon balzani Berl. Several from Manaos, from Itacoatiara, 
Amazon, on large Passalus, and Porto Velho, Rio Madeira, 
Brazil, on Scarabeeidee. (Mann and Baker.) 
Celenopsis subincisa Berl. One from Abuna, Rio Madeira, Brazil, 
on Scarabeide (Mann and Baker). 
Celznopsis brevis sp. nov. 
Body as broad as long, almost pointed at each end, dorsum with a transverse 
furrow over coxe II, no hairs, except four rather long ones near margin beginning at 
middle, and smaller ones around hind margin. Beak and palpi prominent, leg 
I very long and slender, longer than body, last joint a little longer than the pre- 
ceding; other legs moderately stout, all shorter than body; all legs with fine hairs 
and a stouter one on patellee of legs III and IV; sternal plate (of 9) only between 
coxee IT, two bristles each side; the vulva large, much narrowed behind; anus small, 
fully its length before end of ventral plate; peritreme long, angulate near coxe III. 
Length, .65 mm. 
