M. W. R. de V. GRAHAM 



(i) Malar space only one third the length of an eye or even slightly less. Length 

 of antennal scape slightly less than the transverse diameter of an eye. 

 Fore wing with proximal half of costal cell virtually bare (Text-fig. 87). 



Dorsellum distinctly reticulate. Gaster i-i to 1-2 times as long as head 

 plus thorax. Clypeus, lower face, and genae, purplish bronze 



subglaber sp. n. (p. 115) 

 Malar space somewhat more than one third the length of an eye. Length of 

 antennal scape equal to or slightly greater than the transverse diameter of 

 an eye. Fore wing with lower surface of costal cell with at least some hairs 

 in the proximal half, sometimes with a complete row. 



Gaster i-i to 1-4 times as long as head plus thorax .... 3 



(2) Fore wing with row of hairs on lower surface of costal cell at least narrowly 

 broken in the middle ; basal cell open below except at apex. Clypeus, 

 genae, and at least the lower part of the face, purplish bronze 



maculatus Erdos (p. 114) 

 Fore wing with row of hairs on lower surface of costal cell complete, sometimes 

 partly double ; basal cell closed below in its distal half. Head entirely 

 greenish ........ unicolor sp.n. (p. 116) 



(1) Hypopygium shorter, its tip situated at one third the length of the gaster or 

 slightly more. Slender species. Gaster elongate, 1 -3 to 1 -5 times as long as 

 head plus thorax and 3-5 to 4 times as long as broad ; last tergite 1-7 to 2 

 times as long as its basal breadth. Length of eye 1-85 to 2-2 times the 

 malar space ........... 5 



Hypopygium longer, its tip situated at or nearly at half the length of the 

 gaster, the latter at most 1-25 times as long as head plus thorax. Species 

 sometimes more squat or with the malar space relatively shorter . . 6 



(4) Basal cell of fore wing (Text-fig. 89) quite extensively pilose (less so in very 

 small specimens). Legs, except coxae and sometimes the mid and hind 

 femora, testaceous. Funicular segments relatively long (the first 1-9 to 2-3 

 times as long as broad, 1-4 to 2 times as long as the pedicellus). Length 

 3-5 to 5-1 mm. ....... ductilis (Walker) (p. 117) 



Basal cell of fore wing less extensively pilose. Legs dark, femora mainly 

 fuscous to black ; at least the hind tibiae infuscate medially. Funicular 

 segments relatively shorter (the first 1 -5 to 1 -6 times as long as broad) not or 

 only slightly (up to 1-2 times) longer than the pedicellus. Length 2-8 to 3-4 

 mm. 



May be only an abnormally dark small form of ductilis (q.v.) 



Pductilis i. linearis (Walker) (p. 118) 

 (4) Length of eye 1 -8 to 2-1 times the malar space. Funicular segments relatively 

 short, the first quadrate to 1 -6 times as long as broad ; sixth usually 

 quadrate to slightly transverse, occasionally slightly longer than broad. 

 Legs very dark ; femora mainly fuscous or black, at least the hind tibia 

 more or less infuscate, sometimes the legs are mainly black. (Species- 

 group of dolosus Walker) ......... 9 



Length of eye 2-3 to 3 times the malar space. Funicular segments relatively 

 longer, the first i-6 to 2-4 times as long as broad ; sixth nearly always at 

 least slightly longer than broad, rarely quadrate. Legs almost always 

 paler ; tibiae usually testaceous, occasionally the hind ones slightly 

 infuscate ............ 7 



(6) Scutellum moderately strongly convex ; a broad strip running down its 

 middle is not distinctly striate-reticulate, most of the areoles being hardly 

 longer than broad. Gaster only 2-1 to 2-2 times as long as broad, not 

 longer than head plus thorax ; only the basal tergite tinged with green or 



