:;^0 E. Bergrolh: 



segments aeutely a little prominent, euch of the two male genital 

 segments visible from l)elow. Tibiae cyliudrieal, not sulcate above. 



By the remarkable stiucture of the scutellum and otlier characters 

 •closely allied to Vitdliis, Stal, Init the pronotal humeral angles are 

 not produced in a spinous process, the sternal keel is much shoi-tei-. 

 and the scutellar apical appendage is larger and differently shaped. 

 As in V/te/Iiis this appendage is not visil)le wlien the hen)elytra are 

 ■closed. 



15. Pktai.asfis tkscokum, n. sp. 



Straw-coloured, finely and lathe)- tliickly almost concoloruusly 

 punctate, cicatrical areas and a longitudinal median line of pio- 

 notum, and scutellar apical appendage impunctate, an apical dot 

 to clavus black, membrane (including veins) vitreous, centre of 

 mesosternum (except the ridge) orange, apical margin of last dorsal 

 segment and of last connexival segment above and beneath, and 

 male internal genital appendages dark sanguineous. Second antcn- 

 nal joint not quite twice the length of first, third as long as second 

 and somewhat shorter than fourth (fifth wanting). Sternal keel in 

 the middle of its prosternal part very thin, translucent and almost 

 vitreous. Sixth male ventral segment in the middle slightly longer 

 than the two preceding segments together; first male genital seg- 

 ment short with subtruncate apical margin, second genital segment 

 longitudinally bluntly ridged in the middle, on tlie sides witli a 

 transversely oval impression, apical margin sinuate l>ut in tlie 

 middle with a short nari'ow parallel process forming a continuation 

 of the median ridge. Length, <? 9.5 nmi. 



Stevenson River. 



16 ROEBOURNEA DIVKRSA, Dist. 



Tempe Downs, Macdonnell Ranges. 



Distant placed this insect in Basicri/pfits, H. Sch., and Van 

 Duzee, wdio gave a very good description of it under the specific 

 name ttiniidifron.s', placed it with a reservation in the genus 

 Phyllocej^hala Lap. It belongs to a very distinct genus described 

 by Schouteden under the above name. Van Duzee mentions only 

 one fuscous vitta on either side of tlie venter, l»ut normally there 

 are two such vittae on each side. In the larvae, ^vhich have four- 

 jointed antennae, the head and pi'onotum are constructed mucli as 

 in the imagines, and they are also similarly coloured, but the 

 pronotum has a very distinct black transverse median spot which is 

 acutely indented laterally, and the aVidomen has above and beneatli 

 a prominent black transverse spot at the middle of the lateral 



