242 DEMELIUS SEMIRUGOSUS, 



NOTE XLn. 

 ON THE MALE OF DEMELIUS SEMIRUGOSUS, WATERH. 



BT 



J. R. H. NEERVOORT van de POLL. 



In the Ent. Mo. Mag. XI (1874), p. 127, Mr. Water- 

 house described the above named beautiful Australian Lon- 

 gicorn , which is very badly figured in the 25^h part of the 

 »Aid to the Identification of Insects" (pi. 161, f. 6). No 

 mention however was made of the sex of the type speci- 

 men. As I visited the British Museum and compared the 

 specimen in my possession, I could ascertain the type to 

 be a 9? whilst my own specimen proved to be a cT. 



This cT is larger than the 9 ^jpe, measuring 35 mm. 

 The length of the antennae is 60 mm. ; the S^d and 4^^ 

 joints about as long as the first; the 5tli to S^h increasing, 

 all longer than tbe first, more slender than the preceding; 

 the 9^^ and lO^li decreasing and becoming more slender, 

 the 10*^ as long as the scape; the lltli joint almost as 

 long as the S^d and 4^^ together , flat , slightly curved , 

 suddenly narrowed below the middle; the d^'^ to 10^^ joints 

 armed with a gradually decreasing spine at the inner side ; 

 besides the short pubescence the first nine joints show a 

 fringe of long, soft, fulvous hairs along the underside. The 

 tibiae are armed with short spurs; the middle and poste- 

 rior tarsi with the basal joint as long as the two following 

 together , the anterior ones broad , stout. 



It is not quite exact, that the thorax should be nar- 

 rowest behind , it is really narrowest in front , but the 

 fordermost pair of lateral tubercles , being placed very close 

 to the front margin , one is at first inclined to take the 

 distance between the tubercles for the length of the front 

 margin. 



Notes from the Leyden ]Museura , "Vol. VIII. 



