534 ON AUSTRALIAN FossoRiAL WASPS. [May 12, 



Mesonotum half as broad again as long, with a broad shallow 

 depression from the anterior margin to the centre, in the de- 

 pression is a very delicate longitudinal carina. Median segment 

 very short, the posterior slope vertical, the space at the base 

 coarsely obliquely striated, with a median sulcus ; the posterior 

 surface transversely rugose, with a deep median sulcus. Abdomen 

 subovate, shining, very minutely punctured ; the first segment 

 about one-third longer than the second, very narrow at the base, 

 rather more than half as wide at the apex as the apex of the 

 second segment, the apical segment lanceolate. The radial 

 nervure is received not far from the apex of the cubital cell. 



Black ; the scape of the antennas, pronotum veiy narrowly 

 interrupted in the middle, the scutellum (except at the base), a 

 transverse line on the postscutellum and a transverse band on 

 each side of abdominal segments 2-4, least broadly separated in 

 the middle on the second segment, yellow ; the tegulfe, legs, 

 mandibles, and the apical margins of ventral segments 2-5 fei-ru- 

 ginous. Wings fusco-hyaline, nervures black. A small spot on 

 the mesopleurpe below the anterior wings yellow. 



6 . As in the $ , but the distance between the eyes at the 

 base of the antennae is equal to half the length of the scape, the 

 median segment is more coarsely striated and the apical abdo- 

 minal segment is rounded ; the yellow spot on the mesopleurae is 

 absent. 



Length, c? 9 mm., exp. 14 mm.; § 10mm., exp. 17 mm. 



Hab. Mackay, Queensland (^Turner); April and May. 



Nearly allied to C palitans Bingh. from India. 



Crabro bivittatus, sp. n. 



5 . Mandibles bidentate at the apex. Clypeus small, clothed 

 with silvery pubescence, with a median caiina, slightly porrect at 

 the apex, with a minute tooth on the apical margin on each side 

 of the carina. Head subquadrate, slightly emarginate posteriorly, 

 very finely and closely punctured, the front smooth in the middle, 

 clothed with silvery pubescence on the sides. The posterior ocelli 

 further from each other than fiom the eyes and at least 

 one-half further from the posterior margin of the head than 

 from each other. Pronotum narrowed anteriorly, the anterior 

 margin straight and a little raised with a slight groove 

 behind it ; the mesonotum slightly depi-essed in the middle 

 anteriorly, minutely punctured. Median segment steeply sloped 

 posteriorly ; the space at the base divided by a very broad median 

 sulcus in which are a few transverse strias, with short longitudinal 

 striae at the base, the apex finely punctured ; the posterior slope 

 of the segment transversely and very finely striated, with a 

 median sulcus. Abdomen very closely and minutely punctured. 

 The recurrent nei-vure is received a little before the apex of the 

 cubital cell. 



Black ; the scape of the antennas yellow ; the antei-ior margin 

 of the pronotum narrowly intei-rupted, a broad transverse band at 



