244 
hairy ; porrected. Legs simple, very slender, moderately 
long ; femora, tibiae, and first joint of tarsi minutely and very 
densely spinulate along all three ridges. Tegmina very small, 
apex rotundately sinuate, elevated knob dark brown, remainder 
pale brown. Wings narrow, apex almost subacute : veins and 
veinlets of costal area from brown at the base to greenisn 
along costa, and whitish near margin : of the remainder from 
bright to faintly rosy : interspaces pale green near costa, re- 
mainder very faintly rosy, transparent. 
Lengtli of body, 52 mm. ; width, from 1-2*3 mm 
Length of head, 3*3 mm. 
Length of antennae, 19 mm. 
Length of pronotum, 2 mm. 
Length of mesonotum, 9 mm. 
Length of metanotum, 6'7 mm. 
Length of abdomen, 34 mm. 
Length of cerci, 3 mm. 
Length of tegmina, 2 mm. ; width, 1*5 mm. 
Length of wing, 28 mm. ; width, 12 mm. 
Lengtn of ant. femora, 16 mm. 
Length of ant. tibiae, lo mm. 
Length of med. femora, 10 mm. 
Length of med. tibiae, 10 mm. 
Length of post, femora, 14 mm. 
Lengtii of post, tibiae, 15 mm. 
Length of tarsi, 3-4 mm. 
This species appears to be nearest in affinity to N. annu- 
lipes, Curtis, but is considerably smaller and more slender, the 
proportions of antennae and wings, besides less conspicuous 
characters, appear also to be sufficiently different to entitle it 
to specific rank. It is the first of the genus which has reached 
me from any part of the State of South Australia. 
Bacillus peristhenellus, ■■<pec. nov. 
Two males. Body pale ochreous to dull blackish-brown, 
filiform, thorax carinated. Head pale dull ochreous, with 
two interrupted black vittas behind the eyes, an ovate, longi- 
tudinal impression anteriorly, on either side of which a fine 
distinct ridge, hind margin crenate. Eyes yellowish -grey. 
Antennae as long or longer as anterior femora, first joint long, 
flat, next two very short and thick, remainder shorter than 
first, subequal, filiform. Pronotum rough, dull, same colour 
as head, wider behind, anterior margin subcrenate, forming 
a distinct ridge, median carina very fine, marginal ridges 
distinct, intra-marginal carina rather broad. Mesonotum 
with subparallel sides, raised median and submarginal ridges, 
dark brown. Metanotum similar, ridges much more distinct, 
