460 HYMENOPTERA. 



scutellum, and a stripe on each side of the thorax, yellow ; the 

 wings shghtly coloured, with a dark fuscous cloud on the ante- 

 rior margin of the superior pair ; the nervures rufo-testaceous, 

 brightest at the base of the wings ; the tegulje ferruginous ; the 

 legs fuscous above and yellow beneath; the coxae and poste- 

 rior femora fuscous, their apex testaceous ; the posterior tarsi 

 fuscous. Abdomen : the apical half of the first segment yellow ; 

 the apical margin of the third segment with a narrow yellow 

 band; the apical margins of all the segments very narrowly 

 testaceous; beneath, the margins have a very narrow yellow 

 band. 



Hab. Brazil (Para). (Coll. H. W. Bates.) 



92. Cerceris marginata. B.M. 



Female. Length 5 lines. — Black : the clypeus, sides of the 

 face as high as the antennsc, a triangular spot above the cly- 

 peus, the carina above the antennae, the mandibles, and scape in 

 front, yellow ; the flagellum fulvous beneath ; the tips of the 

 mandibles ferruginous. Thorax : the collar transverse, straight, 

 not arched, angulated on each side ; the collar, tubercles, two 

 spots on the scutellum, a transverse interrupted line on the post- 

 scutellum, an oblique line on each side of the subcordate space 

 at the base of the metathorax, and a stripe on each side of the 

 metathorax, yellow; the punctures on the metathorax coarse, 

 and running into longitudinal striae ; the subcordate space at the 

 base of the metathorax transversely grooved, with a central lon- 

 gitudinal impressed line which passes downwards to the apex of 

 the metathorax ; the metathorax with large deep scattered punc- 

 tures ; the coxae, trochanters, and femora beneath, yellow ; the 

 tibiae in front, and the anterior and intermediate tarsi, yellow ; 

 the apical joints of the intermediate tarsi and the posterior pair 

 fuscous ; the wings hyaline, with a fuscous spot at the apex of 

 the externo-medial cell, and a cloud occupying the marginal 

 cell and extending to the apex of the wing. Abdomen strongly 

 but not closely punctured ; the sides and apex of the first seg- 

 ment yellow ; a yellow band on the apical margin of the third 

 and three following segments ; the apical segment entirely yellow, 

 with a black spot in the middle of its base. 



Hab. Brazil (Santarem). (Coll. H. W. Bates.) 



93. Cerceris rixosa. B.M. 



Female. Length 4i lines.— Black and coarsely punctured; 

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

 fulvous beneath. Thorax : the tegular and post-scutellum yel- 



