384 HYMENOPTEBA. 



The head is nearly as wide as the thorax, narrowed and rounded behind, where it is 

 shorter than the length of the eyes ; shining, sparsely punctured, covered, but not very 

 thickly, with long soft pale hair ; the ocelli brownish and not situated on a black patch ; 

 the mandibles broadly black at the apex. The antennae are, if anything, longer than 

 the head and thorax united ; bare, towards the apex covered with a white down ; the 

 flagellum at the base darker, the scape lighter and yellower in colour than the rest ; 

 the third joint, if anything, shorter than the fourth. The thorax is densely covered 

 with long white soft hair ; the mesonotum is coarsely punctured, the punctures almost 

 running into reticulations and nearly obliterating the two longitudinal furrows ; the 

 scutellum coarsely and closely punctured. The median segment has an abruptly 

 rounded slope, and is strongly reticulated all over, except a smooth spot in the centre 

 at the base divided by a curved furrow. The pro- and mesopleurae strongly punctured, 

 except the apex of the latter; the metapleura reticulated, smooth at the base. The 

 abdomen is a little longer than the head and thorax united, ferruginous, but of a darker 

 tint than the thorax, and with the base of the second and other segments more or less 

 blackish. The petiole is longer than broad, a little shorter than the second segment, 

 gradually dilated towards the apex, smooth and impunctate ; the second segment is 

 also smooth and impunctate, covered with long pale soft hair ; the other segments are 

 covered with long white hair, the hair having a slight fulvous tinge; the apical 

 segment is keeled down the side, rounded at the apex, the surface shagreened. The 

 basal segment on the underside is bluntly keeled down the centre, the apex oblique, 

 the surface bearing somewhat large, distinctly separated, punctures. The second ventral 

 segment bears some not very large, shallow punctures ; the other segments are covered 

 with long pale hair, hiding the surface ; the apical ventral segment is not so hairy as the 

 others, and is more strongly punctured. The legs are of a paler and more yellowish 

 colour than the thorax or abdomen ; they are covered thickly on the tibiae and tarsi 

 with long pale soft white hair ; the spurs are pale ; the four hinder femora are darker 

 than the front pair, particularly towards the apex. The wings reach beyond the apex 

 of the abdomen and are clear hyaline throughout ; the nervures are pale yellow, the 

 stigma having a darker tint; the radius is curved at the base and apex; the first 

 transverse cubital nervure is curved, the second is straight and slightly oblique, and the 

 third is obliterated completely ; the cubital nervure is angled where the first (and only) 

 recurrent nervure is received before the middle of the cellule ; the transverse basal 

 nervure is received quite close to the transverse median, being almost interstitial. 



This species is smaller than S. paron, and has the abdomen longer compared with the 

 head and thorax, with the petiole more gradually dilated ; the fourth antennal joint is 

 longer compared with the third ; and the mesonotum is reticulated (not punctured), with 

 the parapsidal furrows obsolete. 



