BY REV. T. BLACKBURN. 689 



on the lateral interstices) among the finer ones, but they are very 

 much less numerous than in the following species and are not 

 distinctly seriate in arrangement. There is no difficulty, how- 

 ever, in identifying the insect by its colour and markings, which 

 are very constant in a long series of specimens that I have 

 examined It is a species of pale or whitish-testaceous colour, 

 with two black spots at the back of the head (variable in size), a 

 very conspicuous black spot near the apex of each elytron, the 

 antennas moi'e or less infuscate or blackish and usually some 

 black markinsrs on the under surface. The antennae are moder- 

 ately elongate, with all their joints distinctly longer than wide; 

 the head is very wide and short; the basal joint of the anterior 

 four tarsi of the male is only feebly dilated. The size is long. 

 14-24 lines. The habitat is W. Australia, where it seems to be 



common. 



P. Arethusa, sp nov. 



Ovalis; sat convexa; nitida; rufo-testacea, capite prothoracis 

 macula magna antica elytrorumque notulis magnis (sc. fascia 

 communi basali lata retrorsum trifida, fascia lata mediana 

 retrorsum valde ai-cuata, apice, et sutura, hac pone medium 

 valde dilatata) nigris, antennis infuscatis, pedibus infuscatis 

 (nonnullorum exemplorum nigris); capite minus crebre minus 

 subtiliter punctulato ; antennis minus elongatis, articulo 

 basali brevi, articulis externis modiee depresso-dilatatis 

 (7' 8'que latitudine longitudini sat sequali); prothorace quam 

 longiori ut 2^ ad 1 latiori, tequali, sparsim subtiliter (latera 

 versus subgrosse) punctulato, lateribus parum arcuatis, 

 angulis anticis rotundatis posticis fere rectis; elytris haud 

 striatis, distincte minus fortiter 10-striatis, interstitiis planis 

 subtiliter valde symmetrice seriatim punctulatis, sutura 

 postice manifesto carinata, parte marginali quam series 

 externje vix magis fortiter punctulata. 



^. Tarsorum anteriorum 4 articulo basali parum dilatato. 

 Long. 14, lat. 14 lines. 



A very easily recognised species superficially by its colouring 

 (which is constant in the four examples I have seen), notably the 



