24 Z. BOUCEK 



Paratypes. 'Central America': ex Euglossa sp., i $ (USNM). Ecuador: 

 Coca, v. 1965, 1$ (L. Pena) (CU, Ithaca). Guyana: Tumatumari, vi. 1923, 1$ 

 {F. X. Williams) (BBM, Honolulu); Kamakusa, 1$ (H. Lang) (USNM); Tuheit 

 Trail, Kaieteur, 1. and 3.ix.i937, 3^ (Richards & Smart) (BMNH). French 

 Guiana: Cayenne, i $ (MHN, Geneva). Brazil: 'Amazonas', 1861, 1$ {Bates) 

 (UM, Oxford); without data, 1$ (BMNH). Bolivia: Prov. Cochabamba, 

 Yungas Esp. Santo, ix.-xi. 1949, 1? (L. Pena) (MCZ, Cambridge); without data, 

 I? (BMNH). 



I cannot suppress some doubts whether the male described above really belongs 

 to this species and not to the closely related and similar P. surinamensis (Westwood) . 

 Both species are similar in colour, and form of dorsellum, but the males have, 

 like the females of P. conura sp. n. relatively less fine and denser puncturation, 

 particularly on the scutellum. They also show an indication of a boss on the 

 sixth tergite, which is so characteristic of the female, but have rather weak 

 propodeal plicae like P. surinamensis, the male of which remains unknown to me. 



I find also a slightly puzzling problem in the females which I attribute to P. 

 conura. They all seem to be conspecific but some show weaker propodeal plicae 

 and the Amazonas and Cayenne specimens deviate also in the form of the gastral 

 apex. Whilst in all the other specimens it is as described above, in these specimens 

 the epipygium very slightly exceeds the apex of the sixth tergite so that it is not 

 completely hidden in dorsal view. 



Polistomorpha femorata sp. n. 



(Text-fig. 32) 



9. 15 -5 mm. Body mainly testaceous with brown to blackish markings very similar to 

 those of P. surinamensis, except that the fifth tergite has, apart from the apical brownish 

 band, another sub-basally; also wings darker due to slightly longer brown pilosity which is 

 very similar to that of P. conura sp. n. 



Head distinctly narrower than pronotum posteriorly (0-9 : i-o), dorsally about 2-5 times as 

 broad as long, temples slightly broader than in P. conura. Occipital carina between ocelli 

 stout, arched forwards, strigose; vertex laterad of ocelli dull but broad area without coarse 

 punctures; ocelli not large, their triangle about 2-3 : 1. Face very finely punctured ; convex 

 interantennal area distinctly keeled. Relative measurements: height of head 84, width of 

 frontovertex 51, of scrobes 32, lower face width 42, height 44, eye 47 : 33, upper orbit not 

 distinctly emarginate; malar space 27, width of mouth 32. Lower margin of clypeus dis- 

 tinctly produced, medially emarginate and depressed. Scapus shorter than malar space as 

 25 : 27; flagellum similar to P. conura but first flagellar segment twice as long as broad, about 

 1 -5 times as long as pedicellus. 



Pronotum medially nearly regularly convex; sides emarginate in middle; lower corner about 

 70 degrees. Puncturation of thoracic dorsum as in P. conura, finer than in P. surinamensis. 

 Scutellum 1-35 times as broad as long; axillar furrows distinctly converging forwards, otherwise 

 as in P. conura. Dorsellum dorsally densely punctured and hairy, sharply carinate but apex 

 truncate, with carina lowered medially so that the shape is more crescentic, not triangular. 

 Propodeum only 0-58 the length of scutellum, median carina strong but plicae obliterated as 

 in P. surinamensis; postero-lateral corners nearly reaching level with apex of median carina. 

 Fore femur stout, 2*9 times as long as broad; mid femur stout basally, tapering to apex. Dorsal 



