of FosHorid] Hymenoptera. 413 



Cerceris varijjes. 



Female. Length 7 lines. Black, with the second and fifth 

 segments orange-yellow. Head : the base of the mandibles, 

 the clypeus, the face (as high as the insertion of the antennae), 

 and a minute ovate spot behind the eyes yellowish white ; a 

 spot on the scape, and the second and four following joints of 

 the antenna? fulvous beneath. Thorax : the triangular space 

 at the base of the metathorax with fine divergent stria? ; wings 

 subhyaline, with a dark fuscous cloud occupying the marginal 

 cell and passing on to the apex of the wing ; the nervures rufo- 

 fuscous ; the tegul^ rufo-testaceous, with a yellow spot in 

 front ; the apex of the femora and the tibia? ferruginous ; the 

 anterior and intermediate tarsi white, slightly stained with 

 ferruginous at the apex of the joints, the posterior tarsi fuscous, 

 with their base and the claw-joint ferruginous, the posterior 

 trochanters white beneath. Abdomen black beneath. 



Hah. Adelaide. 



Cerceris venusta. 



Female. Length 4| lines. Variegated with black and yellow; 

 the head wider than the thorax. The mandibles, clypeus, face 

 higher than the insertion of the antenna?, a line between them 

 (which terminates in a round spot), the scape in front, a line 

 behind the eyes, and two oblique spots on the vertex yellow ; 

 the flagellum fulvous and slightly fuscous above. Thorax 

 black, with a broad fascia on the prothorax, the tegula?, scu- 

 tellum, postscutellum, and a large ovate oblique spot on each 

 side of the metathorax yellow ; the legs ferruginous, with yellow 

 stains ; beneath, the trochanters and some spots ou the coxze 

 white ; a black line on the posterior femora and tibia? ; wings 

 subhyaline, with a fuscous cloud occupying the marginal cell 

 and passing beyond to the apex of the wing. Abdomen : 

 the base of the first, second, and fourth, and the third seg- 

 ment entirely black ; a small ovate yellow spot on each side 

 of the third segment ; otherwise yellow ; a central ferruginous 

 stain on the first and second segments ; beneath ferruginous, 

 with the margins of the segments narrowly black ; the fourth 

 and fifth segments with a yellow spot on each side. 



Hah. Queensland. 



Cerceris opposita. 



Female. Length 4^ lines. Black ; the clypeus elevated, and 

 with three yellow fascia? on the abdomen ; the insect covered 

 with rather fine confluent punctm-es. Head : the mandibles, 

 cly])cus, sides of the face as high as the insertion of the antennae, 

 a narrow line between tliem, and a minute spot behind the eyes 



Ann. d;Maci.N. Hist. Scr. 4. Fo/. xii. 28 



