227 



three parts, a transverse part in front, and behind are two 

 pieces meeting angularly in the middle ; the vulva, behind 

 these pieces, is V-shaped ; the genital plate has two bristles 

 each side, the sternal plate one on each side, the ventral 

 plates have many short bristles near sides, and others on the 

 ventral area toward margin ; the anus is hardly its length 

 before the hind margin. Length, - 8 mm. 



Hah. — Tasmania: Chudleigh, Hobart, and Kindred, 

 with Irido myrm ex. 



Myrmonyssus aequalis, n. sp. 

 Pis. xxiv., fig. 10; xxv., figs. 14 and 16; and xxvi., fig. 21. 



Body oval, rather pointed in front, broadly rounded 

 behind, with short fine hairs around margin, and on dorsum 

 densely covered with very short fine hair. All legs rather 

 stout, and front pair hardly as long as body, second pair 

 plainly shorter ; third and fourth hardly as stout as others ; 

 the tibia and patella in each leg subequal in length, the tarsus 

 always longer, and ending in a large caroncle, tarsus 2 on 

 lower side narrowed before middle; all legs with few short, 

 simple hairs, few as long as the width of a joint. The under- 

 side of the beak has several transverse or oblique rugose 

 streaks on each side. Length, '8 mm. 



Hab. — Tasmania: Devonport, Hobart, and Ulverstone, 

 on ants (14132) and (14941), and Bagdad, on thorax of 

 Irido rnyrmex gracilis. 



Hypoaspis minusculus, n. sp. 

 PI. xxiv., fig. 8. 



Body about one and one-half times as long as broad, 

 broadest in front of middle, tapering each way. Dorsum with 

 a few scattered, rather short, simple bristles, mostly near the 

 margin. Palpi short. Legs rather slender, first pair nearly 

 as long as body, second much shorter and stouter, fourth 

 shorter than the first ; in all the tarsi are much longer than 

 the preceding joint, and all legs with fairly numerous hairs. 

 Sternal plate short, concave behind, with three short bristles 

 each side; ventral surface with a few bristles, and a pair of 

 rather longer ones near tip ; anal shield plainly longer than 

 broad, broader in front than behind, with an apical bristle, 

 anus near the front edge. Length, "55 mm. 



Hah.- — New South Wales: Sydney, with ants (No. 20). 



Hypoaspis inepilis, n. sp. 

 PI. xxv., fig. 17. 

 9 • Body about one and one-half times longer than 

 broad, broadest at posterior third, tapering rather suddenly 

 1 2 



