194 SPHEGID^. 



and the transv^erse pilose bands on the abdomen ; these latter 

 and the pubescence on the front of the head and clypeus 

 brilliantly silvery in certain lights ; legs black, the tarsi and 

 tibial calcaria testaceous, in marked contrast with the upper part 

 of the legs ; wings hyaline and iridescent ; nervures and tegulse 

 pale testaceous. 



Hah. Tenasserim. d. Length 1 -d ; exp. 11-14 mm. Type in 

 the British Museum. 



A true TacJii/sphex ; the anterior femora conspicuously emar- 

 ginate at base. 



375. Tachysphex auriceps, Cam. Mem. Manch. L. Ph. Soc (4) ii, 1889, 



2 • Head densely, thorax more sparsely pubescent, the pu- 

 bescence longer and most dense on the clypeus, the front and 

 sides of the median segment; head and thorax finely and closely 

 punctured ; ocellar area raised, longitudi)ially furrowed, the furrow- 

 produced backward on to the vertex and forward on the front ; 

 behind the ocelli there is also a well-marked A-shaped furrow ; 

 clypeus slightly produced anteriorly, arched ; median segment 

 punctured, rugose, the apex transversely striate. Black, the 

 pubescence golden ; the apex of the femora, the tibise and tarsi, and 

 the basal two segments of the abdomen red, the apical margins of 

 the 1st to 5th segments with transverse medially interrupted 

 bands of glittering silvery pile ; wings light flavo-hyaliue, tegulse 

 and nervures testaceous. 



c? similar, the pubescence more dense, the eyes above more 

 convergent, the basal segments of the abdomen shaded with 

 black. 



Hab. Bombay ; Bangalore ; Ceylon. 5 . Length 11-12 ; exp. 21- 

 23 mm. 6 • Length 9-10 ; exp. 20 mm. 



376. Tachysphex argyreus. 



Lariada argyrea, Smith, Cat, iv, p. 27(3, J (?""'" 2 )■ 

 Tachysphex argyrea, Cam. Mem. Mamh. L. Ph. Soc. (4) ii, 1889, 

 p. 143. 



2 . Head and thorax pubescent, finely and closely punctured 

 under the pubescence, the eyes strongly convergent at the vertex ; 

 clypeus with the anterior margin broadly rounded ; median 

 segment very closely and minutely punctured, roundly truncate 

 posteriorly, beai'ing above an abbreviated medial longitudinal 

 groove not reaching the base, but continued over the truncate 

 posterior face of the segment nearly to the apex ; legs with long 

 thin pubescence ; abdomen dull and opaque, the surface above 

 finely aciculate. Black, the pubescence silvery white, mandibles 

 ferruginous ; legs with the tibiae and tarsi rufo-testaceous ; abdo- 

 men red, the margins of the segments with broad obscure bands 

 (interrupted along the median line) of sihery pile ; wings hyaline, 

 iridescent. 



