20 



genti, postice subfoveato), lateribus minus fortiter (quam 

 P. scaur oides, Cast., multo minus fortiter) arcuatis in parte 

 postica summa sinuatis, angulis posticis rectis ; elytris modice- 

 convexis, subtiJiter perspicue striatis (striis perspicue punc- 

 tulatis), striis 1'' et 2^ antice fortiter extrorsum versis et 

 prope basin conjunctim profunde sulcatis, inter has strias et 

 suturam fovea sat profunda impressa, parte apicali sub- 

 rugulosa. Long., 5|^ 1.; lat., 2^ 1. 

 In general shape and build this species resembles an insect 

 sent to me by Mr. Sloane under the name P. semistriatus, Cast. 

 Its most striking character consists in the strong longitudinal 

 sulcus of the labrum, which is even more deeply impressed than 

 in any of my specimens of the small group of Tasmanian species 

 notable for that character. The puncturation of its elytra is 

 more marked than in any other specimen of the genus in my 

 collection, extending in regular rows from base to apex and being, 

 quite distinct even on the lateral portions ; it can hardly be the 

 result I think of immersion in spirits. The sinuation (close to 

 the base) of the lateral margins of the prothorax is stronger than 

 in any other Promecoderns known to me. This lateral margin is 

 continued along the base (where it becomes thicker and stronger 

 than on the sides) for about a quarter of the width of the seg- 

 ment and is obsolete in the middle. The prothorax is fully as 

 long as (if anything a trifle longer than) wide by careful measure- 

 ment. The first and second elytral stride running into a short 

 deep fovea-like sulcus at the extreme base seems to be a good 

 character. I cannot make up my mind as to the sex of the 

 specimen before me. The front tarsi are not spongiose beneath, 

 but they are very short and wide for a female, — the basal joint 

 scarcely longer than wide and the following three joints distinctly 

 transverse. I can find only one puncture on each side of the 

 hindmargin of the last ventral segment, but as the setae of the 

 punctures are wanting and the margin itself is slightly damaged 

 I am not sure that there may not have been two punctures on 

 each side. The lateral fove?e of the ventral segments are not 

 linearly produced towards the middle of the segments. The 

 median longitudinal line of the pronotum is much like that in a 

 specimen sent to me by Mr. Sloane as olivaceus, Macl. This- 

 species is as brilliantly nitid as P. scaur oides, Cast. 

 Western Australia (Yilgarn District). 



GNATHAPHANUS. 



G. Darwini, Blackb. Mr. Sloane (Proc. L.S., N.S.W., 1899, 

 p. 555) says that a comparison of the description of the above 

 insect with that of G. (Diaphoromerus) 7nuUipunctatus, Macleay 

 (both published in P.L.S., N.S.W., 1888, Part 2), convinces him 



