150 Transactions. — Zoology. 



these protuberances are shorter and more sharply constricted 

 than in T. oUvacca ; on the darker portions are numerous 

 fair-sized rounded humps ; spinners stout, dark. Corinis 

 vulva pale stone-colour, somewhat triangular, about twice as 

 long as broad, centrally produced above the rima genitalis 

 into a brownish lip, about as broad as long, concave above. 

 Te Karaka, A. T. U. 



Fam. ATTIDiE. 

 Genus Plexippus, C. Koch. 



PlexiiJpus herhigradus, sp. nov. 



Male. — Ceph. th., long, 4; broad, 2-5. Abd., long, 4; 

 broad, 2-1. Legs, 1, 4, 2, 3 = 8, 6-3, 5-6, 5-5 mm. 



Gcphalothorax, caput brownish, more or less suffused with 

 bright orange-red, mottled with a creamy-brown penetrative 

 tint ; two dark spots in line with second row of eyes ; thorax 

 reddish-mahogany colour ; few pale hairs, sparse yellowish 

 fringe on frontal margin ; broad oval, pars thoraeica slightly 

 exceeds pars cephalica in length, latter aplanate, limited 

 by a somewhat diamond-shaped indentation ; profile-contour 

 rises at an angle of 45°, slopes perceptibly across caput ; 

 clyi^cus vertical, equal in height to radius of a fore-lateral 

 eye. 



Anterior row of eyes slightly recurved ; laterals separated 

 from central pair by nearly their diameter, latter pair rather 

 less than that interval from each other ; interspace between 

 posterior eyes, which are visibly larger than anterior-laterals, 

 perceptibly exceeds space dividing latter pair ; eye-area about 

 one-fourth broader than long ; angles somewhat prominent, 

 black-brown . 



Legs brownish-yellow, genual and tibial joints of 1st pair 

 reddish-mahogany, penultimate and terminal joints darkish- 

 brown ; 1st pair stoutest ; genua and tibia together equal 

 cephalothorax in length ; tibial joint one-third longer than 

 genual ; metatarsal and tarsal joints thinner than tibial, one- 

 fourth longer than that article ; 2 slightly exceed 3-4 in 

 strength, latter of about equal stoutness ; hair light, sparse ; 

 about 5 spines on femora of 1-2 ; 6 or 7 on femora of 

 3-4 ; spine on inner side of genual joints of 1 ; tibia? and 

 metatarsi of 1-2, — 3-3, 2-2 ; tibise of 3-4 have 4 spines ; 

 metatarsi 2, with rings of 5 ; outer claw, one strong tooth 

 near bend of claw ; inner, about 10 short close teeth ; claws 

 well curved, claw-tuft long. 



Falpi, humeral and cubital joints resemble legs in colour ; 

 former article equals three terminal joints in length ; pars 

 cubitalis somewhat linear, rather stouter than humeral joint ; 

 pars radialis darker, slimmer, and about one-half length of 



