614 MR. R. E. TURNER ON 



margin ; the pubescence on the whole insect paler ; seventh 

 dorsal segment widely emarginate at the apex. 



Hah. Mackay, Q. {Turner), December to April; Kuranda, Q. 

 {Tamer), March to July. 



In this species there is no band of golden pubescence on the 

 second dorsal segment, which is pr-esent in vestitus, the antennse 

 in that species are black, and the legs piceons, almost black. 

 The eyes are nearer together in vestitus than in pidchrinum, both 

 on the clypeus and vertex, though the diflerence in this point is 

 slight. 



46. PiSON EXORNATUM, sp. H. 



$ . Nigra ; mandibulis, antennis articulis septem basalibus, 

 tegulis, femoribus apice, tibiis, tarsis, abdomine segmento primo, 

 segmentoque quinto margine apicali pallide ferrugineis ; alis 

 hyalinis, venis fusco-ferrugineis. 



Long. 11-13 mm. 



5 . Extremely near P. pidchrinum, from which it differs in 

 the ferruginous colour of the first abdominal segment, in the 

 absence of brown chitinous and golden pubescent apical bands on 

 the third and fourth dorsal segments, in the slightly less distance 

 between the eyes on the clypeus, and in the distinctly narrower 

 median segment. The distribution of the golden pubescence on 

 the head, thorax, and median segment, also on the apical band of 

 the first dorsal segment, is the same in both species. 



Hah. Mackay, Q. {Turner), May. 



47. PiSON AUREOSERICEUM Rohw. 



Pison aui^eosericeum Rohw. Proc. U.S. Nat. Museum, xlix. 

 p. 246(1915), 2 d. 



This species also strongly resembles pidchrinum, except in 

 colour, the ferruginous colour of the legs including the whole of 

 the femora and trochanters ; the hrst abdominal segment is also 

 ferruginous, and there is a broad ferruginous apical band on the 

 second segment ; the tliree apical segments are almost wholly 

 ferruginous. The apical dorsal segment of the male is broadly 

 truncate, not emarginate as in pidchrinum. 



Hah. Kuranda, Q. {Turner), February ; Mackay, Q. {Turner), 

 Februaiy and Mai"ch ; Duaringa, Q. ( U.iS. Museum) ; Victoria 

 {French). 



48. PisoN AURATUS Sliuck. 



Pison auratus Shuck. Trans. Ent. Soc. London, ii. p. 78 (1 837), $ . 



This is extremely near aureosericeum, with which species I had 

 at one time confused it, but it difters in the distinctly longer 

 median segment and in the wholly ferruginous colour of the 

 second ventral segment. The striation of the posterior slope of 

 the median segment is much less coarse than in aureosericeum. 



Hah. Port Darwin {Dodcl). 



