456 HYMENOPTERA. 



and acute in the middle ; a yellow spot on the mandibles at their 

 base ; the metathorax with a triangular- shaped space at the base 

 in the centre, which is obliquely striated ; wings dark fuscous ; 

 the legs ferruginous, with a yellow stripe in front of the anterior 

 and intermediate tibiae and tarsi; the posterior tibiae serrated 

 exteriorly, and covered with shining pile within. Abdomen : the 

 first, second, and base of the third segment ferruginous; the 

 apical portion of the third segment yellow, with a slight emargi- 

 nation in the middle ; the sixth ventral segment armed with an 

 acute spine on each side at the apex. 



Hab. North China. (Coll. R. Fortune, Esq.) 



83. CERCERIS SINENSIS. B.M. 



Female. Length 4 lines. Black : the fa^e below the antennas, 

 the scape in front, and the mandibles, yellow, the tips of the 

 latter ferruginous ; the apex of the clypeus slightly elevated. 

 Thorax : the collar, a spot behind the tubercles, the tegulae, two 

 spots on the scutellum, the post-scutellum, and an ovate macula 

 on the posterior lateral angles of the metathorax, yellow ; wings 

 subhyaline, with a fuscous cloud occupying the marginal cell and 

 extending to the apex of the wing ; legs yellow, the base of the 

 coxae, and of the anterior and intermediate femora, black ; the 

 posterior femora black, with their extreme apex yellow ; the 

 posterior tibiae above, except their base, and the tarsi, rufo- 

 piceous. Abdomen : the first segment with a narrow yellow 

 band on its apical margin, the second segment with a large 

 macula at its base, and another smaller spot on each side of its 

 apical margin, the three following segments with a yellow band 

 on their apical margins, yellow ; the three bands attenuated in 

 the middle ; beneath, the second, third and fourth segments with 

 transverse attenuated yellow bands in the middle ; the second 

 segment sometimes yellow, with a dark macula in the middle. 



Hab. North China. 



84. CERCERIS UNIFASCIATA. B.M. 



Female. Length 4 lines. Black : the face below the antennae, 

 the scape in front, and the mandibles, yellow ; the flagellum 

 fulvous beneath. Thorax : an obscure line on the collar laterally, 

 a spot on the tegulae in front, and the post-scutellum, yellow ; 

 a minute spot on each side of the metathorax ; the wings sub- 

 hyaline, the apex of the anterior wings with a dark fuscous cloud, 

 which also occupies the marginal cell ; the apex of the coxae, the 

 trochanters, and tips of the femora, the anterior and intermediate 



