z. boucek 



Hind coxa above distinctly transversely striate ; all tibiae testaceous ; dorsellum dull, 

 extremely densely punctured, dorsally flat and rather abruptly edged posteriorly 

 and laterally; scutellum sublaterally dull, with hardly any interspaces between 

 dense punctures ......... atrata sp. n. (p. 27) 



Polistomorpha fasciata Westwood 

 (Text-figs 18, 24, 25, 247, 248) 



Polistomorpha fasciata Westwood, 1874 : 134, pi. 25, fig. 3, $. LECTOTYPE ^ (here designated), 



Brazil: 'Amazonas' (UM, Oxford) [examined]. 

 Polistomorpha nigromaculata Cameron, 1904 : 96, <$. LECTOTYPE <$ (here designated), 



Panama (BMNH) [examined]. Syn. n. 



The apparently unique original specimens of fasciata and nigromaculata are 

 accepted as lectotypes. 



The species stands rather apart from all the other known species of the genus, 

 differing mainly by the quadrangular dorsellum (Text-fig. 25) and preserved 

 rudiments of the maxillary palpi (Text-fig. 18). 



Biology. Reared from cells of Euglossa ignita Smith and Euglossa sp., Apidae. 



Distribution. Panama, Colombia, Trinidad, French Guiana, Brazil, Ecuador. 



Material examined. 



Type data given in synonymy. 



Colombia: Gorgona Island, vii.1924, 1 £ (L. E. Cheesman) (BMNH). Trinidad: 

 io.vi.1933, 1 $ (D. Vesey-FitzGerald) (BMNH); Arena Forest, 30.iv.-Lv.1945, 

 ex Euglossa ignita, 1 $, 1 $ (R. G. Donald) (USNM); St Augustine, i.v.1945, ex 

 Euglossa sp., 1$ {Donald) (USNM); 7.VL1949, 1 $ (D. L. Mbotela) (BMNH). 

 French Guiana: Saint Laurent de Maroni, 2 $ (MNHN, Paris). Brazil: State 

 Para., Alter de Chao nr Santarem, 1$ (Bates) (BMNH). Ecuador: Guayaquil, 

 1920, 1$ (Buchwald) (TM, Budapest); 1930, 1$ (BMNH). 



Polistomorpha conura sp. n. 



(Text-figs 6, 17, 26, 29-31) 



[Polistomorpha surinamensis (Westwood); Westwood, 1874 : 133-134, pi. 25, fig. 2. Mis- 

 identification.] 



$. 1 1 -0-15 -5 mm. Ochreous-yellow with black and brown markings; black are: transverse 

 band on vertex across ocelli, inner edge of mandibles, two transverse submedian spots on 

 pronotum (usually connected), median and sublateral longitudinal streaks on mesoscutum 

 not reaching posterior margin, broad triangle on scutellum, middle of propodeum and teeth 

 of hind femur apically; darker or lighter brown are: genal streak below eye, cross-band on 

 occiput, indistinct spots in front of pronotal maculae, tegulae, dorsellum basally and posterior 

 metanotal margin, lateral margin of propodeum and gaster except, usually, for paler bands at 

 apex of first tergite and base of fifth tergite. Pubescence mainly brown, darker on black 

 spots. Wings yellowish brown, veins brownish. 



