REVISION OF LEUCOSPIDAE 129 



(Turner) (BMNH); Howison's Poort nr Grahamstown, 17.xii.1967, 1 $ (E) (Jacot- 

 Guillarmod) (AM, Grahamstown); Cape Prov., Villiersdorp, (iv.) xii. 1943, ex 

 Serapista denticulata , 3 $, 1 <J (E) (SAM, Cape Town; BMNH). 



Leucospis rostrata sp. n. 



(Text-figs 154-156) 



§. 4-3-5-0 mm (form B), 6-5-7-5 mm (forms A, C). In holotype (form A) yellow colour 

 predominant, leaving black only following: scrobes, vertex and occiput narrowly at occipital 

 carina, narrow cross-line on pronotum, antero-median and sublateral parts of mesoscutum, 

 subtriangular area on scutellum basally and not reaching apex, ventral part of mesopleurum, 

 teeth of hind femur; following parts are reddish instead of black: flagellum, prepectus, upper 

 mesepimerum, propodeum, sides of gaster, tergites four and five medially and narrowly along 

 margins, coxae except hind one dorsally, tibiae except externally (fore tibia dorsally) and 

 tarsi. In darker specimens (form C) red is mostly replaced by black, yellow partly by red and 

 markings thus much reduced so that black prevails: face black except sometimes reddish spots 

 laterad of toruli and tiny spots at occipital margin laterad of ocelli; mesoscutum mostly black 

 with small red spots in place of yellow pattern of holotype; whitish yellow reduced to pre- 

 marginal line on pronotum, lateral spots on scutellum, dorsellum, dorsal spot on hind coxa, two 

 or one spot on hind femur and two interrupted bands on gaster; hind femur mostly black but 

 dorso-apically red, sometimes with apical whitish spot and with similar transverse-triangular 

 spot broadest at base of toothed margin in basal third; gaster black but more or less red at 

 base and along median line, with whitish band narrowly interrupted on fourth tergite and 

 another, broken to two transverse maculae, near apex of fifth tergite. In small specimens 

 (referred to as form B) colour pattern generally intermediate between A and C: black prevailing 

 on mesoscutum, hind coxa and on middle of gastral dorsum centred on fourth tergite; hind 

 femur suffused rufous with black centre. Wings infuscate, moderately in holotype, strongly 

 in form C, in latter case with violaceous tint. 



Head slightly narrower than pronotum anteriorly, in dorsal view about 2-4 times as broad as 

 long; occipital carina high medially but low and disappearing before reaching eyes; temple 

 very short, not carinate. POL about 2-2 times OOL; ocellar triangle about 2-7 : 1; vertex 

 with transverse rugae mixed with punctures at eyes, coarsely umbilicate-punctured in front 

 of lateral ocelli. Frontal protuberances rather weak but in some specimens subrectangular at 

 upper scrobes; scrobal carina dorsally arched, removed from ocellus by third of its diameter. 

 Head in facial view 1 -08-1-15 times as broad as high ; interantennal lobe without keel. Relative 

 measurements: height of head 54, width of frontovertex 34, scrobes 17, lower face 27-5, its 

 height 28, eye 33-5 : 21-5, malar space 12, mouth 20. Emargination of eye weak. Clypeus 

 about 1-2 times as high as broad but mostly not well-defined dorsally, flat, its lower margin 

 slightly produced (Text-fig. 155), middle tooth blunt. Flagellum plus pedicellus 1-22-1-44 

 times as long as breadth of head (relatively shorter in smaller specimens, form B), subfiliform, 

 apically 1-5 times as broad as pedicellus and 1-2 times as broad as second flagellar segment; 

 first flagellar segment quadrate, second fully i-i times, eighth 0-86-0-93 times, clava 1-65-1-80 

 times as long as broad. 



Thorax moderately densely hairy, hairs not long. Pronotum transversely subdepressed, 

 with distinct though not sharp premarginal carina, hind margin not carinate, straight; sides 

 subconcave, slightly converging; interspaces mainly a quarter as broad as punctures, with fine 

 transverse microreticulation ; lateral panel moderately convex, with small depression at spira- 

 cular indentation. Mesoscutum slightly depressed postero-submedially, interspaces of punctures 

 anteriorly distinctly microreticulate ; vestiges of parapsidal furrows less than half as long as 

 I 



