ii2 M. W. R. de V. GRAHAM 



blue, the rest purplish black. Scape not or hardly more than three 

 quarters as long as an eye ..... Ptarrha (Walker) (p. 122) 

 Scutellum weakly convex to nearly flat ; a strip running down the middle has 

 striate-reticulate sculpture, most of the areoles being distinctly longer than 

 broad. Gaster 2-2 to 4 times as long as broad, from as long, to 1-25 times 

 as long, as head plus thorax. Scape most often somewhat more than three 

 quarters the length of an eye ........ 8 



8 (7) Gaster 2-2 to 2-8 times as long as broad . . . ajfinis (Walker) (p. 118) 



Gaster 3 to 4 times as long as broad . . millenius Szczepanski (p. 119) 



9 (6) Scutellum reticulate with elongate areoles, but these do not give the appear- 



ance of strigosity. Propodeum usually without a purplish or violet zone 

 around each spiracle ...... longigena sp. n. (p. 120) 



Scutellum (Text-fig. 88) very finely and regularly strigose, at least over its 

 middle third. Propodeum nearly always with a purplish or violet zone 

 around each spiracle ...... dolosus (Walker) (p. 120) 



(Males) 



1 Antennal flagellum (Text-figs. 81, 82, 84) with outstanding hairs, whose length 



is about as great as the breadth of the funicular segments ; sensilla sparse, 

 arranged in one, sometimes slightly irregular, row situated in the distal 

 half of each funicular segment ........ 2 



- Antennal flagellum (Text-figs. 83, 85) with subdecumbent hairs, whose length 



is at least somewhat less than the breadth of the funicular segments ; 

 sensilla most often numerous and arranged in two to three rows on each 

 funicular segment, sometimes even four rows on the proximal segments . 6 



2 (1) Propodeum between the spiracles as strongly reticulate as the callus and 



metapleuron ; all these areas blue or greenish. Scutellum reticulate with 

 little tendency towards striation. Fore wing with row of hairs on lower 

 surface of costal cell often broken medially ; basal cell sometimes partly or 

 entirely open below .......... 3 



- Propodeum between the spiracles more weakly reticulate and more shiny than 



the callus and metapleuron ; the former area blue or green, the two latter 

 most often bronze or coppery bronze. Scutellum sometimes partly strigose. 

 Fore wing with row of hairs on lower surface of costal cell complete ; basal 

 cell closed below .......... 4 



3 (2) Antenna (Text-fig. 84) with funicle slender, proximally hardly as stout as the 



pedicellus ; its first segment about 2-5 times, the sixth nearly twice, as long 



as broad. Dorsellum with distinct, raised reticulation subglaber sp. n. (p. 115) 



- Antenna with funicle stouter (proximally as stout as or rather stouter than the 



pedicellus), its first segment hardly twice as long as broad, the sixth only 

 slightly longer than broad. Dorsellum with relatively weaker sculpture 



Pmaculatus Erdos (p. 114) 



4 (2) Antennal scape (Text-fig. 81) reaching slightly above the level of the vertex, 



its length fully equal to or slightly greater than the transverse diameter of 

 an eye. About the middle third of the scutellum has very regular striate 

 sculpture whose areoles are for the most part three times as long as broad 

 or more, the sculpture even more regular than that of the female (cf . Text- 

 fig. 88) ........ dolosus (Walker) (p. 120) 



Antennal scape reaching only to about the level of the middle of the median 

 ocellus, its length hardly equal to the transverse diameter of an eye. Scutel- 

 lum with more reticulate sculpture with little tendency towards striation 

 (Text-fig. 86) ; over its middle third most of the areoles are less than three 

 times as long as broad .......... 5 



