282 SPHEGIDJ-. 



of the pronotum, the tubercles, a large spot beneath them on 

 the pleurae, a broad stripe across the tegute, a large square spot 

 at each lateral anjile of the scutellum, the postscutelluin, the 

 posterior lateral angles broadly of tjie median segment, the apex 

 of the femora, the tibiae and tarsi of all the legs, a very large oval 

 spot on each side of the basal abdominal segment, and transverse 

 bauds, greatly widened at the sides, on the posterior margins of 

 segments 2-5, yellow. 



Hah. Barrackpoi'e. $ . Length 7 ; exp. 13 mm. 



513. Stizus prismaticus. 



Lana prismatica, Smith. Jour. Linn. Soc. 1858, p. 103, $ c? . 

 Stizus prismaticus, Ca7n. Mem. Manch. L. Ph. Soc. (i) iii, 1890, 

 p. 244 ; Hcmdl. Sitzungsb. Akad. Wtss. Wien, ci, 1892, p. 55. 



2 c? . Head, thorax, and abdomen shining, obscurely but very 

 finely and closely punctured, each puncture beariug a fine, very 

 short, recumbent hair ; clypeus transverse, the anterior margin- 

 depressed, very slightly and widely emarginate ; median segment 

 posteriorly deeply excavate, the sides compressed and somewhat 

 laminate, not incised. Black, suffused with brilliant tints of 

 purple and blue in certain lights ; the clypeus, a triangular spot 

 above it, an abbreviated Une at the inner orbits of the eyes, the 

 scape in front and the flagellum beneath, the posterior margin of 

 the pronotum, the tubercles, the outer margins of the tegulae, an 

 oblique spot on each side of the scutellum, a transverse line on the 

 postscutellum, an elongate spot on the lateral angles of the median 

 segment, an elongate spot on each side of the basal abdominal seg- 

 ment and a fascia on the apical margins of the 2nd-4th segments, 

 with a spot on each side of the 5th segment, yellow ; the fascia 

 on the 2nd segment is broadest laterally ; the fascia on the 3rd 

 segment abbreviated ; legs variegated with yellow ; wings hyaline 

 and iridescent. 



Smith describes the male as having two parallel abbreviated lines 

 on the mesonotum and the fasciae on the abdomen entire, but in 

 the common Indian and Burmese form the c? and $ are pre- 

 cisely similar. I have seen no specimen corresponding in colour 

 with Smith's description, nor with the specimens from Borneo and 

 Celebes in the British Museum. One variety wants the abbreviated 

 fascia on the 3rd abdominal segment ; a second form is altogether 

 destitute of the yellow lateral spots on the basal abdominal segment. 



Hah. Sikhim ; Ceylon ; Burma ; Teuasserim. $ . Length 9-11 ; 

 exj). 17-20 mm. J • Length 8-9; exp, 17-19 mm. 



Note. — Handlirsch (Sitzungsb. Akad. Wiss. Wien, ci, 1892, 

 pp. 43 et seq.) has described several closely allied forms more or 

 less resembling S. prismaticus, Smith. One of these is given from 

 the Andamans, two or three others are stated to occur in the 

 Oriental region. I do not know of the latter having been found 

 within our limits. I append, however, short descriptions, taken 

 from Handlirsch's work. 



