129 



length of the shortest line that can be drawn across the eye at its 

 narrowest point (behind the antennee). On the underside the 

 eyes are much more approximate than in P. sericics. If the insect 

 be turned upside down, so that the undersurface of the head is 

 looked down upon, the width of the intsrval between the eyes is 

 distinctly less than the width of the visible portion of either eye. 

 The portion of the head between the eyes (on the undersurface) is 

 evenly and somewhat closely and strongly punctulate, and bears 

 a shallow impression near its front. In F. serious the portion 

 between the eyes of the undersurface of the head is distinctly 

 wider than the width of the visible portion of either eye (similarly 

 looked down upon), is not distinctly punctured, and bears an ex- 

 tremely deep transverse sulcus. The presence of this sulcus makes 

 the front and hind margins of the same appear as two strong 

 parallel costa?, so that from a certain point of view (looking from 

 in front obliquely along the undersurface of the head) these two 

 and the front margin of the submentum appear to be three strong 

 parallel nitid ridges (almost like knife-edges). There is no such 

 appearance on the undersurface of P. hoojjs. 

 South Australia ; basin of Lake Eyre. 



F. Taiei, sp. nov. Nigro-piceus ; sat dense griseo-sericeo 

 pubescens ; prothorace ad latera obtuse tuberculato, supra 

 crasse rugato ; elytris aj)ice truncato-emarginatis, incisurse 

 angulis vix acutis ; subtus oculis valde separatis, spatio inter 

 oculos crasse sparsim obscure punctulato transveisim mani- 

 feste concavo. 



Maris antennis corpore multo bre^doribus, prpeter modum dilatatis ;, 

 articulo 1° ovato quam latiori parum longiori, 2° perbrevi 

 quam longiori quater latiori, 3° 6° singulis 1° longitudine 

 sub^equalibus, 3'' 4° que fortiter trans versis, 5° paullo angus- 

 tiori vix transverso, 6° quam 5'^* sat angustiori quam latiori 

 paullo longiori, 7^ paullo longiori minus incrassato ; ceteris 

 simplicibus, segmento ventrali apicali posticeleviter bisinuato. 



Fern, latet. 



This is one of the most remarkable Longicorns known to me, 

 owing to the extraordinary shape and thickness of the antennae 

 in the male, which remind one of the horns of an ibex. At their 

 widest part they are scarcely narrower (placed side by side) than 

 the prothorax. The interval between the eyes on the upper- 

 surface is considerably wider than the length of the shortest line 

 that could be drawn across the eye behind the antenna?. The 

 portion between the eyes on the undersurface is extremely wide, 

 scarcely narrower than the widest part of the buccal cavity. In 

 shape this piece of the undersurface of the head is not unlike that 

 of P. serious, Newm., but is wider and much less strongly sulcate 



