818 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, lol. XXI. 



in ferox but deeply incised in ferocior. The petiole is also much longer in 

 fcro.r, and the striation of the cordate area of the median segment is 

 longitudinal. The markings in the three species are almost identical. 



Cerceris invita sp. n. 



5 . Nigra, opaca ; clypeo, mandibulis basi, margine interiore oculorum, 

 carina frontali, pronoto utrinque, tegulis, postscutello, segmentoque abdo- 

 minali secundo basi anguste flavis ; scapo, flagello subtus, segmento 

 abdominali primo, pedibusque testaceis ; alis hyalinis, apice infumatis, venis 

 testaceis ; clypeo apice emarginato, angulis dentato ; mesopleuris minute 

 bituberculatis ; segmento mediano area basali delicatissime oblique striata, 

 segmento ventrali secundo area basali elevata nulla. 



Long. 13 mm. 



O. Clypeus flat, short, rather widely emarginate at the apex, the angles 

 •of the emargination produced into broad and slightly porrect teeth. An- 

 tennee inserted nearly twice as far from the anterior ocellus as from the 

 base of the clypeus ; the second joint of the flagellum half as long again as 

 the third ; the frontal carina produced into a small tubercle at the apex. 

 Eyes diverging towards the clypeus ; posterior ocelli twice as far from the 

 •eyes as from each other. Pronotum not depressed in the middle ; meso- 

 pleurse with two minute tubercles. First abdominal segment nearly twice 

 as broad as long ; second ventral segment without a raised area at the 

 base ; pygidial area finely transversely rugulose, about two and a half 

 times as long as the breadth at the base, gradually narrowed from the 

 base and almost pointed at the apex. Opaque, pubescent, shallowly punc- 

 tured ; the enclosed area at the base of the median segment finely striated, 

 •obliquely in the angles, more indistinctly in the middle, intermixed with 

 fine punctures, with a low median carina instead of the usual groove. 

 First recurrent nervure received just before the middle of the second 

 •cubital cell. 



Habitat. — Sumatra. Type in Oxford University Museum, ex coll. 

 West wood. 



The clypeus resembles that of C. instabilis Sm. 



Cerceris e.ccavata Cam. 



Cerceris e.rcarata Cam. Journ. Straits Asiatic Soc, p. 13o, 1902. S • 

 This is the representative of C. vischnu Cam. in Borneo. 

 The male only differs from vischnu in having the petiole a little shorter 

 aiid broader, and in the much less distinctly raised basal area of the second 

 ventral segment. The female has no raised area at the base of the second 

 ventral segment, there is a yellow spot at the base of the second dorsal 

 segment and the wings are strongly shaded with fuscous on the costal 

 margin. 



