REVISION OF LEUCOSPIDAE 25 



part of hind coxa with distinct striation which becomes obliterated in lower half of depression. 

 Hind femur unusually broad (Text-fig. 32; hence the name), broad basal tooth followed by 

 about eight small teeth; hind tibia with outer ventral carina confined to basal one-third. Fore 

 wing: hairs below stigma slightly longer than width of stigmal vein. 



Gaster with median keel distinct except on first tergite, only slightly obliterated at apex 

 of fifth and on sixth tergite, but distinct as a smooth blunt keel on epipygium. Puncturation 

 mostly dense but less so and coarser on paler cross-band on fifth tergite; first tergite mostly 

 smooth, with broad median cross-band of sparse fine punctures. First tergite hardly longer 

 than broad, basal fovea short, transverse, shallow; disc strongly convex. Fifth (broadest) 

 tergite 1-75 times as long as the first, about i-i times as long as broad, more than four times as 

 long as sixth tergite; latter 2-5 times as broad as long, its anterior and posterior margins parallel. 

 Epipygium nearly as long as broad, conical, apex elevated (Text-fig. 32), its long ventral outline 

 convex; cerci low, small, in four-fifths of segment. Hypopygium reaching middle of gaster. 



$. Unknown. 



Biology. Unknown. 



Holotype?, Brazil: Para (BMNH). 



P.femorata sp. n. is very similar to P. surinamensis (Westwood) (for redescription 

 see Schletterer, 1890 : 295-297) and P. conura sp. n. It differs from all species 

 of the genus mainly by the unusually broad hind femora. 



Polistomorpha surinamensis (Westwood) 

 (Text-figs 16, 23) 



Leucospis (Polistomorpha) Surinamensis Westwood, 1839 : 265-266, pi. 4, fig. 5, §. LECTOTYPE 

 $ (here designated), Surinam (MNHU, Berlin) [examined]. 



There are known now several species close and very similar to P. surinamensis, 

 so that it is not possible to find out which of the earlier records really concern this 

 species, except where the original material can be re-examined. Only Schletterer 

 (1890 : 295-297) redescribed P. surinamensis from the then unique type (now 

 regarded as lectotype, as Westwood did not specify how many specimens he had). 

 He mentioned also another specimen in the Hamburg Museum, but that was 

 destroyed during the last war. It is not sure which species Ducke had (1906) 

 and Westwood himself redescribed and figured in 1874 another species as 

 surinamensis (see P. conura sp. n.), mistaken for the type also by Graham (1969 : 17). 



The male is still unknown. 



Biology. Host unknown. Like several other species of the genus, P. 

 surinamensis mimics some Polistine wasps, but that does not necessarily mean 

 that these wasps are its hosts. 



Distribution. Guyana, Surinam, French Guiana, ? Brazil. 



Material examined. 



Type data given in synonymy. 



Guyana: Essequibo River, Moraball Creek, 4.xi.i929, 1 $ {Oxf. Univ. Exped.) 

 (BMNH). French Guiana: ToUinche, 1 ? (Le Moult) (MNHN, Paris). 



