HYMENOPTERA OF BOMBAY PRESIDENCY. 307 



transverse, the apex laterally broadly rounded. Apex of post-scutellum broadly 

 rounded. Thorax more than twice longer than wide. The keel on the base of 

 the abdomen is broader, stouter and more clearly defined than usual. The 

 puncturation is distinct, finer and weaker on the abdomen than on the head or 

 thorax ; the whole body has a silvery pile. The 1st abdominal band is distinctly 

 dilated on the sides and is narrowly bordered at the base with red, the 2nd is 

 narrowed in the middle. 



A distinct species of Ancistrocerus, which appears to be rare compared with 

 Odynerus, sensu str. in India. 



Odynerus {Ancistrocerus) xanthozonus, sp. nov. 



Black, under side of antennal scape, clypeus, a small irregular spot over the 

 antennae, mandibles largely above, a line on pronotum, tegulae except in centre, 

 and the apices of abdominal segments, yellow. Legs, yellow, the coxae in front, 

 and the greater part of femora black, the middle femora with the apical half 

 yellow in front. Wings fuscous, with a distinct violaceous tinge, the nervurea 

 and stigma black. ft. 



Length 10 mm. 



Bombay. 



Antennal claw stout, not reaching to the middle of 10th joint. Head closely 

 punctured, thickly covered with long white hair. Clypeus roundly convex, 

 sparsely punctured, the apical incision semi-circular. Thorax closely, strongly 

 punctured, thickly covered with short thick white pubescence ; the punctures on 

 the scutellum are more widely separated ; the scutellum slightly depressed in 

 the middle ; post scutellum rugosely punctured, its apex with an oblique slope. 

 Median segment short, rugosely reticulated, except in the middle, the rugose 

 part clearly separated by a keel, the centre with a stout keel. 



Rhynchium auratiacum, sp. nov. 



Orange-yellow, the antennal flagellum, vertex and mesonotum of a deep 

 orange colour ; wings hyaline, slightly infuscated, the costa and stigma orange 

 yellow, the costal cellule tinged with fulvous, ft. 



Length to end of 2nd abdominal segment 8 mm. 



Deesa, October (Nurse). 



Head and thorax closely and strongly punctured, the puncturation on the 

 abdomen finer. Clypeus distinctly longer than wide, the middle above wide and 

 transverse, the apex with a shallow rounded incision; the puncturation weak and 

 sparse. Base of thorax quite transverse, the sides not projecting Top of post 

 scutellum broadly rounded, the apex with a serrated edge, the apex with a 

 straight steep slope, smooth, except narrowly above, the apex transverse. Apex 

 of metanotum with a steep slope, finely, closely transversely striated ; the upper 

 half of the sides closely serrated, the lower less strongly serrated, the center 

 with a slight projection. First abdominal segment cup-shaped; the second wider 

 than long, the apex broadly depressed, much more strongly punctured than the 

 rest, the punctured part projecting roundly backwards in the middle ; the 

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