175 



horns of the second (male) genital segment microscopically 

 tubercular, black (pi. xxvii., fig, 9). Antenna; : first joint three 

 times the length of the second, third joint about two-thirds the 

 length of the second, fourth joint scarcely the length of the 

 second, stouter : second intermediate jointlet extremely minute 

 (pi. xxvii., fig. 8). Front tarsi : second joint twice and a half 

 the length of the first (pi. xxvii., fig. -6). Middle tarsi : first 

 joint more than three times the lengMi of the second. 



Male. Length 3-81, breadth 1-77 ; intermediate femora 4:"5G, 

 hind femora 4-06 nun. 



Female. Lmigth iol, breadth 2"-J-i ; intermediate femora 5 •7)8, 

 hind femora 4 "81 mm. 



Larva. About the same size as adult male but broader ; the 

 legs and anteinue stouter, aiid the hind femora shorter, similarly 

 colored to those of the adult. In .spirit specimens the dor.sal 

 integuments ai'e sordid ochreous or yellowish-brown, with the 

 chitenous plates glaucous (pi. xxvii., fig. '!) ; in dried specimens 

 the integuments are deep brown or black, with the plates of a 

 leaden and lighter hue (pi. xxvii., fig. 1). Abdominal segments 

 nine, the two last entirely chitenous. Above, the first genital 

 segment is narrow, and is the last segment bearing the chitenous 

 dorsal plates, beneath, it is half the length of the whole of the 

 preceding abdominal segments taken together, and like them of a 

 pallid hue ; beneath, the second segment is nearly twice the 

 length of the first, somewhat wider than long, with the posterior 

 half blackish ; third segment small, blackish ; the last two 

 segments black above ; these segments do not appear to exhibit 

 any sexual characteristics. 



Length 3-81^ breadth 2 ; internjediate femora, i'oG, hind feuiora 

 3 •55 mm. 



Hah. Tarban Creek, Parramatta River, Balls' Head i-ay, and 

 Middle Harbour, Port Jackson, N.S. W. (Whitelegge and Skuse). 

 April and May. 



Male. Head moderately convex in middle of vertex, somewhat 

 depressed in fr^nt. Antennae three-fourths the length of the 

 body, slender : first j(jiiit longer rlian the remaining three taken 

 together ; second, one-third the length of the first ; third, two- 

 thirds the length of the second, thicker ; fourth, about the length 

 of the second, incrassate, attenuate at the tip ; several small 

 spines at the apex above of first joint, and one or two at the 

 apices of the remaining joints. 



Pronotum rather more than twice and a half broader than long, 

 flattened, with an anterior transverse forea laterally. Mesonotum 

 widest at the middle, with a very indistinct longitudinal impressed 

 median line. 



Front legs : femora stout, narrower at the apex ; tibite four- 

 fifths the length of the femora ; tarsi (pi. xxvii., fig. 6) five-eighths 



