STIGMUS. — PASSAL(ECUS. 267 



491. Stigmus niger, Motsch. Bull. Soc. Nat. Mosc. 1863, p. 23. 



Stigmas coiigrims, Kohl^ Ann. Naturhist. Hofmus. TV'ien, v, 1890, 

 p. (J3 {nee Walk.). 



5 . Closely allied to and resembling S. congrmcs, Walk., but 

 the clypeus is markedly subporreet, projecting at the apex, with a 

 blunt tooth at each side, and smooth, polished, and shining, not 

 aciculate ; the median segment is somewhat shorter and more 

 steeply sloped ; the base strongly coarsely striate, with a triangular 

 space enclosed by convergent furrows continued from the apex of 

 the enclosure to the apex of the segment as a deep medial furrow ; 

 the sides are coarsely reticulate; with a large oval smooth space in 

 the middle. Black and shining, the mandibles in the middle, the 

 scape of the antenni?e, and the tibiae and tarsi of the anterior and 

 intermediate legs only testaceous. 



Hab. Ceylon. $ Length G ; e.ijp. 11 mm. c? unknown. 



Kohl (I. c.) joins these two species, but the specimens I have 

 seen differ as above, and I have kept them separate. 



Genus PASSALffiCUS. 



PemphredoH, pt., Van d. Lind. Mem. Acad. So. Belq. v, p. 78 (1829). 

 Diodonotus, pt., Curtis, Brit. Ent. \v, pi. 49G (183oJ. 

 Passaloecus, Shuck. JFoss. Hytn. p. 188 (1837). 



Type, P. insignis, Van d. Lind. 

 Eange. Palaearctic and Oriental regions. 



Head subquadrate, wider than the thorax ; eyes ovate, reaching 

 down to the base of the mandibles, their 

 inner orbits slightly convergent towards 

 the clypeus ; clypeus transverse, the 

 labrum slightly exserted, entire ; thorax 

 elongate oval ; pronotum transversely 

 linear; mesonotum convex, gibbous 

 anteriorly ; median segment elongate, 

 sloping posteriorly, not truncate. Wings 

 — fore wing with one radial and two 

 cubital cells ; radial cell long, its apex 

 Fig. 75. acute ; 1st cubital cell long, three times 



Fassalcecuslevzpes, $. ^ the length of the 2nd, which is con- 

 stricted above towards the radial cell ; the 1st cubital cell receives 

 the 1st, the 2nd cubital cell the 2nd i*ecurrent nervure. Legs short 

 slender, destitute of spines. Abdomen elongate, cylindrical ; the 

 ventral plate of the basal segment formed into a short petiole, the 

 2nd segment constricted at base. 



So far as I know, only the one species described below has as yet 

 been recorded from the Oriental region. The European species 

 make their nests iu rose-stems, old palings, &c. 



