I'ORRfJSTOMA. 45 



Rostrum one line in length, shining, thick at the hase, narrowed at 

 the apex, impressed at the sides, with a small elongate puncture in 

 front near the base, gently cmarginate at the apex, finely and closely 

 punctured at the base, sparingly punctured towards the apex ; labrum 

 rather elongate, acuminate in front, distinctly and moderately thickly 

 punctured ; mandibles pitchy. Antennae two thirds the length of 

 the elytra, moderately stout. Thorax with the areolets well defined, 

 the central posterior one black anteriorly, the two lateral posterior 

 areolets marked with black internally. Elytra nearly parallel ; each 

 elytron with four costse ; the interstices with regidar double rows 

 of fovea?, the rows divided by a fine but distinct costa. 



Porrostoma uniforme. 



(Plate XI. fig. 7.) 

 Waterh., Trans. Ent. Soc, 1877, p. 76, pi. i. figs. 28-31. 



Nigrum ; thorace, scutello elytrisque ferrugineo-rufis ; rostro 

 minus elongate, crebre subtiliter punctulato, subopaco, apice emar- 

 ginato ; mandibulis piceis ; thorace septemareolato ; elytris quadri- 

 costatis, subparallelis, interstitiis irregulariter biseriatim foveatis. j • 



Long. 4| lin. 



Hab. Port Bowen. 



Rostrum scarcely more than half a line in length, thick at the 

 base, a little narrowed towards the apex, relatively shorter than in 

 the preceding species, but of the same form, gently emarginate at 

 the apex ; labrum transverse, very slightly emarginate in front, and 

 pubescent. Antennae two thirds the length of the elytra; third 

 joint slightly pitchy along the upper edge, the lower anterior angle 

 produced, the produced part very short and oblique to the axis 

 of the joint. Thorax strongly sinuate at the sides. Elytra quadri- 

 costate ; the interstices with irregular double rows of fovese, the costa 

 dividing the rows not very distinct. 



Porrostoma irregulare, 

 (Plate XI. fig. 8.) 

 Waterh., Trans. Enf. Soc, 1878, p. 76, pi. i. figs. 18, 18a. 

 Nigrum ; antennis simplicibus ; thorace rufo-flavo, medio nigro, 

 scutello nigro ; elytris rufo-flavis, quadricostatis, interstitiis biseria- 

 tim punctatis. 6. Long. 3 lin. 

 Hub. East Australia, Mackenzie River. 



Rostrum a little longer than broad. Antennae simple, not dentate ; 

 the third joint one third longer than the following, its upper margin 

 pale ; the joints scarcely obliquely truncate at their apex ; the lower 

 angle slightly less than a right angle, but not produced. Elytra 

 quadricostate, the costa next the suture obsolete posteriorly ; the 

 interstices with two irregular lines of punctures, the lines not 

 separated by a costa. 



