. Aculeate Hymenopiera. 237 



Gen. u^LUKUs. 



^lurus volatilis. 



Male. Length 7j lines. Black, with the legs and 

 abdomen red. Head : the anterior margin of the clypeus, 

 the palpi, mandibles, and a curved line above the inser- 

 tion of the antennae, bordering an elevation, reddish- 

 yellow : the cheeks with a minute tooth at the base of 

 the mandibles ; the scape ferruginous, dusky above ; the 

 cheeks with long cinereous pubescence, that on the 

 mesothorax fulvous. Thorax : the sides, beneath, as 

 well as the metathorax, with a thin cinereous pubes- 

 cence, the prothorax above, the scutellum and legs, of a 

 brick-red ; the anterior margin of the prothorax and the 

 post-scutellum, yellow ; wings fulvo-hyaline, with pris- 

 matic reflections in certain lights. Abdomen red, black 

 at the extreme base ; the sixth segment is also black at 

 its basal margin. 



Hab. Adelaide. 



In the British Museum. 



Gen. Tachypteeus. 

 Tachypterus alho-pictus . 



Male. Length 7 lines. Black, variegated with white. 

 Head : the inner orbits of the eyes, a spot on each 

 side of the clypeus, the basal half of the mandibles, 

 and a narrow line behind the eyes, white. Thorax ; 

 the posterior margin of the prothorax, a curved line 

 from the insertion of the posterior wings traversing 

 the posterior margin of the scutellum, the post-scu- 

 tellum, the tubercles, the front of the anterior coxae, 

 and a spot outside the the posterior pair, white ; the 

 spines at the apex of the tibiee, white; the sides 

 obscurely blue, as well as the metathorax ; wings fusco- 

 hyaline, the nervures black. Abdomen : a minute spot 

 on each side of the first segment, an interrupted line on 

 the posterior margin of the second, third, and fourth, 

 white ; two minute white spots at the apex. 



Hab. Australia. 



