224 SPHEGID^. 



B. Median seofment with a medial longitudinal 

 but no lateral furrows. 



a. Stoutly made and densely pubescent ; 



pubescence and pile on head and thorax 



golden T. cohratum, p. 226. 



b. More slenderly made, pubescence not so 



dense ; pubescence and pile on head and 

 thorax silvery. 

 a' . Front above base of antennae with a 



small tubercle T. obsonator, p. 226. 



h'. Front with a carina between base of 

 antennae. 



a^. Legs wholly black T. rejector, p. 226. 



li^. Legs black, varieaated with rufo- 

 testaceous. 

 a^. Abdomen black, 2ud and 3rd seg- 

 ments red T. bicolor, p. 227. 



i^. Abdomen red, basal segment (pe- 

 tiole) only black T. gracile»cens, p. 227. 



419. Trypoxylon pileatum, Smith, Cat. iv, p. 377, $ ; Kohl, Verh. 



zool.-bot. Ges. Wien, 1884, p. 206; Cam. Mem. Manch. L. Ph. 

 Soc. (4) ii, 1889, p. 119. 

 Trvpoxylon nigricans, Cam,. Mem. Manch. L. Ph. Soc. (4) ii. 1889, 

 p. 119. 



2 6 . Head — the clypeus densely pilose, the front above the 

 antennae produced into a shield-shaped form rounded above, 

 triangular, and running into a sharp carinated point below between 



the bases of the antennae ; from the 



lateral angles of the shield a short 



carina runs into the emargination of 



the eyes, beneath which on each side 



the face is hollowed and smooth ; the 



anterior ocellus is placed in the top of 



the shield, the posterior two ocelli above 



it ; mesonotum, scutellum, and post- 



scutellum smooth and shining ; median 



Fig. 57. — Trypoxylon segment with an enclosed stibtrian- 



pileatum, j. |. gular space at base, the enclosure with 



a medial transversely striate fuiTOW 



continued down from the apex of the enclosed space to the apex 



of the segment ; pleurae, sides and apex of the median segment 



pilose ; abdomen smooth, more than twice the length of the head 



and thorax united. Black, with glittering silvery pile ; wings 



hyaline, nervures testaceous. 



Hab. Barrackpore, Bengal ; Madras ; Ceylon ; Burma ; Tenas- 

 serim. $ 6 . Length 9-12 ; exp. 14-16 mm. 



420. Trypoxylon intrudens, Smith, Tracts. Zool. Soc. vii, 1872, p. 188, 



§ ; Kvhl, Verh. zool -bat. Ges. JJ 7m, 1884, p. 205; Cam. Mem. 

 Manch. L. Ph. Sue. (4) ii, 1889, p. 119. 



2 J . Head minutely and somewhat closely punctured, the 



