REVISION OF LEUCOSPIDAE 23 



Head slightly narrower than pronotum posteriorly, in dorsal view about 2-5-2-7 times as 

 broad as long, with temples distinct though very short. Occipital carina strong and complete 

 down to lower third of eye, sharp and shiny laterad of ocelli; vertex densely punctured; POL: 

 OOL as 13 : 12, ocelli large, their triangle in ratio 2-1-2-4 : l - Frontal protuberances low 

 but distinct, subrectangular; scrobal carina weak or indistinct. Head in facial view fully 

 i-i times as broad as high; face fiat but interantennal area conspicuously convex, sharply 

 carinate only above; rugulose puncturation dense, pubesence indistinct, beneath extremely 

 short. Relative measurements: height of head 8o, width of frontovertex 49, scrobes 31, lower 

 face width 41, height 45, eye 48 : 34, upper orbit shortly subemarginate; malar space 22-5, 

 width of mouth 30. Clypeus much higher than broad although dorsally vaguely delimited, 

 its sides feebly diverging, lower margin rounded laterally, subemarginate in middle, distinctly 

 produced. Scapus as long as malar space. Flagellum broadly filiform, combined with pedi- 

 cellus about 1-3 times as long as breadth of head; pedicellus slightly shorter than following 

 segment (8 : 9); all flagellar segments moderately oblong, second about 1-4, eighth fully i-i 

 times, clava 2-5 times as long as broad, subacuminate. 



Pronotum short (about 2-3 : 1), strongly sloping, except near hind margin at which there is 

 a slight swelling; sides strongly converging forwards, concave in middle; rather densely clothed 

 with hairs which are longer than on mesoscutum, finely punctured; lateral panel smooth at 

 the nearly rectangular lower corner. Punctures on mesoscutum less fine but still about twice 

 as fine as in P. fasciata; vestige of parapsidal furrow at hind corner in form of diverging depres- 

 sion at lateral margin. Scutellum about 1-2 times as broad as long, moderately convex, apical 

 margin bordered by impressed row of punctures; on disc puncturation coarser than on meso- 

 scutum, submedially with interspaces generally about one-third as broad as punctures. Dor- 

 sellum bearing distinct sublaminate carina delimiting dorsal triangle which is rounded at 

 apex, inside of triangle hairy and densely punctured ; postero-lateral flanks below carina, smooth, 

 Propodeum usually with strong plicae and median carina, median part strongly raised, 0-83 

 times the length of scutellum. Fore femur 3-5 times, mid femur 3-4 times as long as broad, 

 latter nearly parallel-sided. For hind leg see Text-fig. 29. Hind coxa on dorsal impunctate 

 part finely transversely strigose. Fore wing: hairs below stigma slightly shorter than width 

 of stigmal vein. 



Gaster (Graham, 1969 : 17, fig. 21, as P. surinamensis [misidentification]) hardly longer than 

 head plus thorax combined, densely punctured, punctures rarely confluent but mostly not 

 lengthened, interspaces only laterally on first tergite broader than punctures. First tergite 

 about i-i times as long as broad, with large elongate-tnanpular basal fovea, sides diverging, 

 nearly straight. Third, fourth and basal two-thirds of fifth tergite with blunt median carina 

 bearing mostly a fine groove. Pubescence on fifth tergite basally subdecumbent, short, apically 

 semi-erect and much longer, dense. Sixth tergite the last one visible from above, very densely 

 covered with longish pubescence, bluntly conical, about o-6 times as long as broad at its base, 

 in lateral view (Text-fig. 30) rounded at apex and overlapping epipygium which is confined 

 to ventral side, distinctly exceeding tip of ovipositor. Hypopygium slightly behind middle 

 of gaster. 



$. 14-15 mm. In colour similar to $ but gaster more regularly banded, with four darker 

 bands apart from that on first tergite, all four medially slightly angularly produced backwards 

 suggesting margins of tergites. Fifth tergite posteriorly with rounded boss which appears 

 subconical dorsally, posterior outline of boss nearly in one subvertical line with epipygium 

 (Text-fig. 31). Middle to penultimate sternites slightly depressed, slightly transverse, last 

 sternite shallowly depressed along middle (in two specimens with a small hole in four-fifths 

 of sternite), longer than broad, sides slightly converging, apex subtruncate and waved in 

 middle, corners rounded. Antenna little different from 9» last flagellar segment subquadrate, 

 clava more acuminate, flagellum with sparse thin semi-erect hairs. 



Biology. Reared as parasite of solitary bees of the genus Euglossa Latreille. 



Distribution. Ecuador, Guayana, French Guiana, Brazil, Bolivia, Peru. 



Holotype $, Peru: Loreto, Atalaya, 29.iii.1954 (/. M. Schunke) (BMNH). 



