264 G - E - J- NIXON 



Head small, strongly transverse, appearing very small in relation to the strongly domed, 

 rather massive thorax (Text-fig. 336). 



Face a little higher than wide, rugose ; top of head and temples more or less transversely 

 rugose-striate. Ocelli in a very low triangle. 



Mesoscutum dull with large punctures along each side of the middle line, with the interspaces 

 scaly-reticulate ; the notaulic courses are broadly rugose-reticulate ; pubescence of mesoscutum 

 consisting of rather thick, closely adpressed brownish-golden hairs. Disc of scutellum strongly 

 domed, especially in front, where it falls steeply to the wide, strongly costate furrow between 

 itself and the mesoscutum ; dull, strongly rugose all over. Posterior, polished band of the 

 scutellum widely interrupted at middle by an area of rugosity. Mesopleurum depressed below 

 and here dull, densely rugose-reticulate. Wings (Text-fig. 335) ; submedian cell of fore wing with- 

 out hairs ; vannal lobe small, strongly concave beyond its widest part and here without trace 

 of a hair-fringe. 



Sides of tergite 1 outside the long, narrow, median plate, and sides of tergite 2 pale, mem- 

 branous. 



Length: ca. 4-2 mm. 



Brazil : Nova Teutonia, 25.iii.1g36, 1 <$, the TYPE, (Plaumann). 

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



A very remarkable and distinctive species, characterized to some extent by the 

 unusually coarse sculpture of the large, hind coxa. Although the shape of the plate 

 of tergite 1 approaches that of Maps and the calliptera-gronp, I do not think that 

 ippis is related to these species. I am inclined to regard it rather as an aberrant 

 offshoot in the xanthaspis-group line of descent. 



XANTHOMICROGASTER Cameron gen. rev. 



Xanthomicrogaster Cameron, 1911 : 325. 



[ = Microgaster La treille ; Wilkinson, 1930 : 284]. 



The essential features of this genus, which seems distinct enough on the material 

 available, lie in the shape of the gaster and the venation of the hind wing. On both 

 these points it differs from Hypomicrogaster. 



Mesoscutum polished and with only a fine, sparse punctation. Scutellum flattened, 

 polished, impunctate ; lateral polished field only weakly convex in the anterior direction, 

 so that the sunken area between itself and the disc gradually narrows from in front to behind. 

 Inner spur of the hind tibia fully three quarters as long as the hind basitarsus ; spines of the 

 outer side of the hind tibia long enough to give the tibia a prickly appearance. Tergite 2 separa- 

 ted from 3 by a deep furrow. Hypopygium short, evenly sclerotised all over. Ovipositor 

 sheath fully two thirds as long as the hind tibia, clothed with long as well as short hairs. 



Key to Species 

 Females and Males 



1 Males .............. 2 



- Females .............. 3 



2 Body predominantly bright reddish yellow, with the mesosternum, propodeum, post- 



scutellum, underside of hind coxa and gaster posterior to tergite 2, blackened ; ter- 

 gite 2 large, very coarsely rugose and together with 3 occupying almost the entire 

 surface of the gaster beyond tergite 1 ; apical tergites very short and retracted 

 beneath 3 ; stigma slightly narrower ; 1st abscissa of the radius slightly longer 

 and more obliquely placed than in pelides (Text-figs. 344 and 345) . . seres sp. n. 



