THREE RARE SPECIES OF HYDRACARINA 65 



A rrkenwus freemani, H albert. 



1903. A. freema/ii, Halbert. Zoo/. Anz. xxvi. 268-9, figs. 7, 8. 



The identification of this species rests on comparison 

 with the type slide which Mr Halbert was good enough to 

 lend me. A slight difference in the arrangement of hairs 

 of the second segment of palpus is noticeable when com- 

 pared with the brief type description ; but as to this, 

 Mr Halbert observes (in lit.) that too much importance need 

 not be attached to it. 



Female. 



Body. Length 1*42 mm.; breadth 1-17 mm. Colour varying from 

 a pale green to a yellowish tint, with 

 darker patches ranging from reddish 

 brown to dark brown. Epimera and 

 capitulum pale orange, shading off to 

 green along the outer edges. Palpi 

 and legs pale green, terminal seg- 

 ments of legs tinged with orange. 

 Dorsum with a bright orange patch, 

 having a pale green band extending palpus, 



from it to posterior body margin. 



Striations of the dorsal surface longitudinal, of the ventral 

 surface, transverse. Outline of body oval, very slightly truncate 

 in the frontal region, and with very weak lateral depressions 

 behind the eyes and at the postero-lateral margin of each side. 

 Lower pair of antenniform bristles moderately long and in- 

 clining inward ; upper pair longer and more slender, inclining 

 outward. Dermal pores large and rather prominent. 



Eyes lying well forward, close to body margin. Distance apart 

 39 mm. Colour, bright red. 



Capitulum of usual form, without any noteworthy feature. Length 

 24 mm. Mandible -27 mm. in length. 



Palpi. -37 mm. in length. First segment with a long curved 

 bristle on distal margin of extensor surface. Second segment 

 with 4-5 minutely pectinate bristles, -07 mm. in length, grouped 

 distally on extensor surface. On the distal portion of the 

 inner surface, 3-4 shorter bristles. Third segment with a long 

 bristle situated well back towards inner distal margin. Fourth 

 segment with two fine hairs on distal flexor surface. Tactile 

 process '04 mm. long. 



Epimera finely porose. First pair with their broad inner margins 



15 l 



