582 NOTES ON AUSTRALIAN COLEOPTERA, 



The specimen which I take to be the female is a larger and very 

 differently shaped insect, the elytra being oval and at the widest 

 (slightly behind the middle) considerably {i.e. as 4 to 3) wider than 

 the prothorax. The elytra are differently tuberculated, the inner 

 row having all the tubercles of its front | run together into a 

 serrate ridge behind which ai'e three separate elongate compressed 

 tubercles, the outer row having only 4 tubercles which are blunter 

 and more elongate than those of the other sex. All the tarsi are 

 more elongate, the front ones being as slender as the rest. The 

 last ventral segment bears a wide semilunar sulcus immediately 

 behind the apex in front of which the surface is strongly gibbous 

 in the middle, an obscure fine carina running backward from the 

 gibbosity across the middle of the semilunar sulcus to the hind 

 margin. It is most probable that the tuberculation of the elytra 

 is variable, but I find it is almost invariably stronger (in the 

 species of this genus) in the small narrow specimens (which I take 

 to be males) than in the others ; this is also the case in many other 

 Amycteridce. 



Except in the characters mentioned above there is absolutely no 

 difference between the two specimens discussed above. The legs 

 in both the examples are a little ferruginous in colour. 



Symbothynus, gen.nov. [Erirldnides). 



Corpus obscure squamosum, sat angiistum sat elongatum sub- 

 parallelum ; rostrum elongatum gracile cylindricum leviter 

 arcuatum, prothorace longius, ad apicem leviter dilatatum, 

 supra lineis elevatis longitudinalibus obscure instructum, 

 setulis erectis sparsis vestitum ; scrobes prsemedianse postice 

 infra conniventes; scapus oculuui haud attingens ; funiculus 

 7-articulatus, articulo 1° sat elongate, ceteris brevioribus 

 clava minus elongata ; oculi sat depressi, subtiliter granulati 

 prothorax basi leviter bisinuatus, lobis ocularibus nullis 

 scutellum distinctum ; elytra prothorace parum latiora 

 coxae intermedise sat approximatse ; femora in medio sat 

 incrassata, mutica ; tibise anticae intus bisinuatse, haud 



