I 



new Sphegidae/roni Australia. 273 



Black ; the antonncc and the first abdominal segment at 

 the base tcsfaccous ; the prothorax, the mesoplouras, the sides 

 of the median segment, and the legs t'onuginoiis ; the median 

 segment abuve obscure bronze-green, testaceous at the 

 extreme apex ; the abdomen very dark bronze-green. Wings 

 hyaline, nervures fuscous; a broad fuscous band crossing the 

 discoidal cell, and another, broadly interrupted in the middle, 

 near the apex. 



Length 5 mm. 



? unknown. 



Ilab. Kuranda, near Cairns, Queensland (January). 



Genus PsEN, Latr. 

 Psen lutescens, sp. n. 



? . Clypeus broader at the apex tlian at the base, as long 

 as broad, covered with silver pubescence; the eyes diverging 

 towards the clypeus and towards the vertex. Head shining, 

 the front delicately reticulate, with a fine median sulca from 

 the anterior ocellus ; a large tubercle between and below the 

 base of the anteiime; from the base of the tubercle on each 

 side springs a carina, which skirts the base of the antennas 

 below, but does not reach the eye. The vertex is broad, 

 smooth, and polished ; the ocelli are la'rge. Thorax shining, 

 finely punctured, the pronotum linear, transverse, very 

 broad ; the scutellum transverse, with a slightly depressed 

 row of strong punctures at the base. Median segment con- 

 vex, oblique, with a transverse depressed space at the base 

 and a very deep median sulca from the base to the apex ; 

 finely rugulose. Petiole long; abdomen shining, very finely 

 punctured. 



Yellow ; the abdomen and posterior legs luteous ; the 

 head, a square spot on the middle of the mesonotum, the 

 depressed line at the base of the scutellum, and a transverse 

 mark on each side of the scutellum black ; the antenn£e 

 fuscous ; the scape and mandibles yellow. Wings hyaline, 

 iridescent. The first recurrent nervure is interstitial witli the 

 first transverse cubital nervure, the second recurrent nervure 

 is received by the third cubital cell near the base. 



Length 9 mm. 



(^ unknown. 



J/ab. Mackay and Cairns, Queensland (November to 

 February). 



Ann. cO Mag. N. Hist. Ser. 7. Vol. xix. 19 



