REVISION OF LEUCOSPIDAE 227 



maculae slightly removed from hind margin, apex of fore femur, hind femur ventro-basally 

 and dorso-apically and hind tibia dorsally. Wings distinctly infumate at venation. 



Head about as broad as pronotum, in dorsal view fully 1 -7 times as broad as long, with temples 

 distinct though extremely short and rounded; frontal protuberances rather high at scrobes, 

 obliquely receding from middle to shallow excision of eye orbit; space above protuberance 

 concave. Vertex almost regularly convex, densely punctured, mesad partly transversely 

 rugose, often with weak occipital carina between hind ocelli; ocellar triangle about 2-4 : 1, 

 POL about 3 times OOL; median ocellus nearly half its diameter from scrobal carina. Head 

 in facial view about i-i times as broad as high. Supraclypeal area fairly convex, median keel 

 distinct above. Relative measurements: head width 104, frontovertex 65, scrobes 38 (height 37), 

 lower face 53 (height 44), eye 61 : 38, malar space 27, mouth 27, length of scapus 23. Flagellum 

 plus pedicellus i-io— 1*15 times as long as breadth of head, distinctly clavate; first flagellar 

 segment narrowed in basal half, hardly longer than the slightly oblong pedicel, second flagellar 

 segment subquadrate. 



Puncturation of thorax coarse but less dense than in the other species, interspaces with 

 microscopic cross-striation which is obliterated on broad mesoscutal disc and absent on 

 scutellum; latter with interspaces up to one-third or one-half breadth of punctures, shiny. 

 Pubescence extremely short. Pronotum with hind margin weakly emarginate, premarginal 

 carina usually distinct; sides anteriorly not distinctly carinate; lateral panel rather abruptly 

 depressed below subcarinate edge. On mesoscutum notaular furrow indicated by outer margin 

 of discal spots and by slight depression more anteriorly. Scutellum about 1-25 times as broad 

 as long, weakly convex, crenulate impressed line at hind margin narrow. Dorsellum alveolate, 

 alveolae generally in two transverse rows separated by vague carina which is slightly more 

 raised submedially; hind margin subcarinate, not smoothly curved. Propodeum medially 

 fully o-8 as long as scutellum. Upper mesopleurum with smooth interspaces between coarse 

 punctures. Hind coxa even in relatively denser puncturation at base below lateral edge with 

 narrow shiny interspaces, hairs not dense, not covering surface; depression nearly smooth 

 (cross-striation usually obliterated), dorso-basal third coarsely punctured, dorsal tooth distinct. 

 Hind femur externally smooth, interspaces mostly broader than punctures. Fore wing: 

 terminal processus of stigmal vein broader than but nearly as long as uncus ; pubescence not very 

 dense, short, basal cell bare along cubital hair line, hairs in its upper half not very dense. 



Gaster slightly constricted behind first tergite, apical part expanding backwards. First 

 tergite subpyriform, about i-6 times as long as broad, dorsally convex and rather regularly 

 punctured with smooth interspaces generally nearly half as broad as punctures; posteriorly in 

 middle slightly depressed but median carina hardly indicated. Third tergite ridged medially, 

 hind margin produced about in right angle. Fourth tergite still more distinctly ridged, ridge 

 bearing fine groove; hind margin produced at very sharp angle, median ridge about as long as 

 maximum width of tergite; slight transverse depression submedially at hind margin of yellow 

 band. Fifth tergite broadest in posterior third, dorsally at sharp apex of preceding tergite 

 transversely depressed; coarsely punctured, interspaces mostly more than half diameter of 

 punctures, mostly smooth; ovipositorial furrow rather short, its apex removed from angle of 

 fourth tergite, its sides ridged and forming lobate elevations at apex of ovipositor. Sheaths 

 less than two-thirds length of hind tibia, in normal position only slightly directed forwards. 

 Gaster in lateral view shown in Text-fig. 267. 



<$. 5'8-9'Omm. In colour and sculpture similar to $, but puncturation often denser. 

 Petioliform part of gaster reddish only behind first tergite, whitish are : a band on fourth tergite 

 (anterior third of broad part of gaster) broadly interrupted medially, a horseshoe-like line on 

 subvertical sixth tergite. First tergite about 1-3 times as long as broad, hind margin hardly 

 emarginate. Second tergite between lateral keels 0-85 times as long as broad, to about as long 

 as broad (in one specimen clearly longer than broad, which throws some doubts on the validity 

 of this character), keels slightly diverging posteriorly, hind margin distinctly emarginate. In 

 lateral view gaster expanding to apex of fifth tergite; sixth tergite on truncate part with narrow 

 impunctate median line indicating a slight keel. Fourth tergite subquadrate. 



Biology. Reared from nest of Ceratina truncata Friese, Apidae. 



