154 Transactions. — Zoology. 



Legs finely striate ; two minute spines at the lower end of femora : 

 anterior pair of femora with a long ridge on the upper margin ; tarsi and 

 tibiae finely pubescent; lowest joint of tarsus fiat, broad. Abdomen 4 lines 

 long ; anal appendages finely pubescent. Weight barely 2 grains. 



Hob. On trees and shrubs, Norsewood, Waipawa County ; 1884: W.C. 



Obs. This interesting, slim, delicate, and fairy-like little creature, is by 

 far the smallest species of the genus known to me ; it differs in several 

 respects from its congeners, particularly in its antennas. It moves very 

 slowly. At first I had supposed it to be merely the larval state of one of 

 the larger species, but its fully developed antenna?, etc., forbid such a 

 supposition. 

 4. Bacillus atro-articidus, sp. nov. 



Female: General colour greenish-grey blotched with brown, bearing a 

 slight iridiscent hue. Head ochraceous, oblong, 3 lines long, wider than 

 prothorax, genae gibbous, vertex depressed, a sub-lunate ridge between the 

 eyes, with two small pits (foveolae) between ridge and base of antennae ; 

 nine large black spines on the occiput, and a single tubercle just above each 

 eye ; antennae slender, pubescent, 10 lines long, composed of eighteen joints, 

 apical one the longest ; palpi pubescent. Prothorax 2 lines long, two black 

 spines at lower edge of pronotum ; prosternum smooth : mesothorax 1\ 

 lines long, six spines in three pairs on mesosternum, several scattered and 

 one large pair of black ones central on mesonotum, and a regular longi- 

 tudinal row of five small spines on the pleura extending down to interme- 

 diate coxae : metathorax 8 lines long, two pairs of spines on metasternum 

 and three pairs on metanotum, with a similar row of five small spines on 

 pleura extending to posterior coxae. Abdomen rather stout, If inches long, 

 mostly smooth, wrinkled longitudinally below ; two short blunt spines above 

 on apical end of each segment, decreasing gradually in size downwards ; 

 two small tubercles below at apical end of the first segment, the end of the 

 sixth segment has foliaceous sides and one large central spine below, with a 

 thick ridge running from it to the middle of sheath of ovipositor : anal 

 appendages large bearing scattered black hairs. Legs rather short ; all 

 having a ridge of double black spines at the apical ends of femora, and two 

 spines at apical ends of tibiae, and all joints black at their apical ends, but 

 the terminal joints of the tarsi are light glaucous-green ; tarsi and ungues 

 are very hairy, the tibiae and femora slightly so ; hairs black : — anterior pair, 

 coxae with two black spines below ; femora 10 lines long with four sharp 

 angles deeply sulcated between, bearing a single row of six large spines on 

 the lower edge, the upper edge sinuous and bearing three minute and 

 distant spines ; the upper excised portion 4 lines long with an elevated 

 sharp ridge ; tibiae of equal length, very slender, smooth ; the basal joint 



