388 HYMENOPTERA. 



oblique lines on each side of the scutellum, running to the base 

 of the wings, white ; the anterior and intermediate tibiae in front, 

 and the posterior pair at their base, white ; the posterior tibiae 

 have also a white stripe within ; the anterior and intermediate 

 tibiae behind and all the tarsi fulvous ; the mucro at the base of 

 the metathorax slightly curved, linear, with the apex obtuse. 

 Abdomen : the basal segment with a broad, the second and 

 sometimes the third, with a narrow slightly interrupted white 

 fascia; the apical segment coarsely punctured and truncate at 

 the apex. 



Hab. India. 



Some examples differ in having the pale markings more or 

 less yellow. 



27. OXYBELUS RUFICORNIS. B.M. 



Female. Length 2^ lines. — Black : head closely punctured ; 

 the face and cheeks with bright silvery pubescence ; a thin gri- 

 seous pubescence on the vertex ; the antennae ferruginous, the 

 scape white in front ; the mandibles white, their apex ferrugi- 

 nous. Thorax punctured, thinly covered with griseous pubes- 

 cence; the collar, tubercles, tegulae and extreme base of the 

 wings, an ovate spot on each side of the scutellum, the squama, 

 the tip of the mucro at the base of the metathorax, and two 

 narrow lines running from the base of the wings to the scutel- 

 lum, yellowish -white ; the wings hyaline, the nervures pale tes- 

 taceous ; the coxae and femora ferruginous, the tips of the latter, 

 the tibiae and tarsi, yellowish-white ; the intermediate and pos- 

 terior tibiae with a ferruginous stripe outside. Abdomen finely 

 punctured and shining ; the basal segment with a large subovate 

 macula on each side, the second segment with a broad fascia, 

 emarginate in the middle anteriorly and narrowed towards the 

 lateral margins, and a narrower continuous fascia on the apical 

 margins of the two following segments, yellowish-white ; the 

 apical segment obscurely ferruginous. 



Hab. India. 



28. OxYBELUS SABULOSUS. B.M. 



Female. Length 2i lines. — Black : head punctured, the face 

 and cheeks with a silvery pubescence ; the flagellum fulvous 

 beneath towards the apex ; the mandibles yellow at their base 

 and ferruginous at their apex. Thorax strongly punctured ; the 

 collar, tubercles, and squama, yellow ; the scutellum with a cen- 

 tral carina ; the mucro short, broad, concave above and notched 



