120 RECORDS OK TUK AUSTRALIAN .MUSEUM. 



Black, witli a narrow yellow margin around the first terguni 

 and along- tlie postei-ior edj^e of each segment, and with a yellow 

 transverse band across the anal valves, the upper and the lower 

 angles of the valves remaining of the dark ground colour.*^ 

 Legs blackisli brown. 



Head smooth and shining even on the upper lip, which bears 

 eight setiferous dimples ; of these, the two median and the two 

 external stand more closely together. The median sulcus is 

 distinct on the upper lip, but soon dies out before reaching the 

 level of the antennae, and is scarcely recognisable on the top of 

 the head. PJyes standing wide apai't, the space being about 

 two a-nd a half to three times the largest diameter of an eye. 

 Ocelli congregated on a sub-triangular field, nineteen to twenty- 

 seven in number ( 5 -|- 6 -j- 5 -f 3 :^ 7 -[- 8 -|-'6 -|- "^ + 2)- 

 Antennal fossa? shallow, the outer margin of the head being but 

 feebly swollen. Antenna? very short, not reachiugthe posterior 

 margin of first tergite ; the three proximal joints almost naked, 

 the distal joints more and more densely clothed with shoi't 

 setfe. Some minute sensory rods exist along the upper distal 

 margin ; four sensory cones at the end. Micrometrical meas- 

 urements of joints : 1st joint 0.344- m/m ; '2nd, 0.387 m/m ; 

 3rd, 0.301 m/m ; 4th, 0.258 m/m ; 5th, 0.344 m/m ; 6th, 0.387 

 ra/m ; 7th and 8th, 0.107 m/m ; total length, 2.128 m/m. 

 Diameter of 2nd joint, 0.322 m/m ; of 6th, 0.365 in/m. 



First tei'gite nearly smooth, moderately shining ; its sides 

 somewhat produced, perpendicular, slightly narrowed and 

 romided laterally, with a pre-marginal sulcus along the anterior 

 and the Intei-al niai'giiis ; no transverse sulci. 



Following segnienis rafhci' less shining, though lacking 

 distinct sculpture. The dorsal jiart is entirely destitute of 

 transverse suture ; it may scaicely be said to be depressed be- 

 low the pores, where, sometimes (on dried specimens), a 

 shadowy gray line is to be witnessed dividing the pro- from the 

 metazonite. Dorsally, the former is adoi-ned with dainty horse- 

 shoe-shaped punctures opened backwaids (PI. xvi., fig. 33); 

 these grow larger sidewa^'s and, below the ])ores, transform 

 into irregularly arched, oblique striae which gradually encroach 

 upon the metazouite and even cross it entirely on tlie ventral 



^s Tliis IxiikI is niissiny in one of tlic female specimens. 



