232 G. E. J. NIXON 



The MUNDA -Group 



Key to Species 

 Females 



c Hind spurs very short, the inner one only about one quarter as long as the hind 

 basitarsus. 



Hind coxa in greater part blackish; flagellum extremely slender, with segment 17 

 about one and a half times longer than wide ; pubescence of the flagellum so fine as 

 to be hardly noticeable ; mesoscutum with a fine, very dense punctation ; pro- 

 podeum on each side of the middle third polished ; nervellus of the hind wing 

 straight and directed slightly inwards on the vannal lobe side ; submediellan cell of 

 the hind wing setose all over ; cubitellan cell very distinctly wider than high ; 

 ovipositor sheath fully two and one third times longer than the hind tibia ; in a dor- 

 sal view of the thorax, the metapleurum is strongly bulging ; hind femur yellowish 

 with darkened apex ........... 2 



- Hind spurs longer, the inner one at least one third as long as the hind basitarsus . 3 

 2 Tergite 3 entirely smooth ; tergite 1 polished at least along most of its medial surface, 



more narrowed behind ; vannal lobe rather deeply concave beyond its widest part 

 and here without trace of projecting hairs ; head, in a facial view, slightly more 

 elongate and the mouth parts obviously lengthened (Text-fig. 254). Length: 4 mm. 

 without ovipositor ........ spilopterus sp. n. 



Brazil: Nova Teutonia, 13. xi. 1937, 1 $, the TYPE, 10. x. 1935, 1 J, [Planmann) . 

 Type in the British Museum (Nat. Hist). 



- Tergite 3 with a very large median zone covered with fine, longitudinal striation ; 



tergite 1 densely rugose all over and with longitudinal elements in the sculpture ; 

 vannal lobe not concave beyond its widest part, shorter and less narrowed apically 

 than in spilopterus, and its edge beyond its widest part with an occasional projecting 

 hair ; head in a facial view slightly less elongate ; mouth parts less obviously 

 lengthened ........... erigone sp. n. 



Brazil: Nova Teutonia, 21. v. 1937, 1 <j>, the TYPE, 14. ix. 1938, 1 $, {Plaumann). 

 Type in the British Museum (Nat. Hist.). 

 I Tergite 1 markedly widened behind, strongly humped at middle, strongly shining and 

 with only weak traces of rugosity towards apex. 



Legs, including the hind coxa but excluding the apex of the hind tibia and the 

 whole of the hind tarsus, bright reddish-yellow ; gaster strikingly bicoloured ; the 

 whole of the upper surface dark brown and the underside intense reddish-yellow ; 

 head, in a facial view, markedly triangular (Text-fig. 256) ; clypeus yellow and 

 deeply emarginate ; antenna as long as the body, with the preapical segment twice 

 as long as wide ; 1st abscissa of the discoideus distinctly shorter than the 2nd and 

 as long as the nervulns ; temples and mesoscutum finely, densely punctate ; 

 propodeum with indication of a weak medial keel, its surface otherwise weakly 

 rugose ; nervellus of the hind wing virtually straight ; median field of tergite 

 (2 -f- 3) about three times as wide as long, highly polished ; the long, narrow gaster 

 highly polished, its hairs reduced to a single row on each segment ; ovipositor sheath 

 fully one and one third times longer than the hind tibia. Length: ca. 4 mm. 

 without ovipositor ......... prater sp. n. 



Brazil: Nova Teutonia, 2.xi.ig38, 1 $, the TYPE, {Plaumann). Type in the 

 British Museum (Nat. Hist.). 



Aberrant within the group on account of the shape of the 1st segment of the gaster 

 and perhaps wrongly placed here. The general appearance of the gaster is striking. 

 I know of no close allies. 



- Tergite 1 not at all widened behind, usually narrowed and, if polished, then the median 



field of tergite (2 + 3) much more transverse ....... 4 



